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Отправлено: 06.12.09 20:53. Заголовок: SERVICE ENGINE SOON ..
SERVICE ENGINE SOON LIGHT
The dash mounted "CHECK ENGINE" light (also called "SERVICE ENGINE SOON" (SES) or "MALFUNCTION INDICATOR LAMP" (MIL) on some model years) is used to inform the technician of detected system malfunctions or abnormalities. When the check engine light turns on, it indicates that a malfunction has occurred for which a trouble code has been set. The trouble code can be retreived with either the on-board diagnostic display, or on some model years, through the use of a Tech-2 scan tool. The malfunction may or may not result in abnormal engine operation. The light goes out automatically once the required repairs are made or if the fault clears itself (intermittent). However, the computer stores the trouble code(s) associated with the detected failure until the diagnostic system, is "Cleared" or until 20 (or 50) ignition switch (on-off) cycles have occurred without the fault reappearing.
Proper operation of the light is as follows:
With the engine running the light is normally off. A bulb check is preformed when the ignition is in the "On" and "Crank" positions. When the engine starts, the bulb goes out. The light comes on and stays on when a constant malfunction is detected. If a malfunction is intermittent, the light will go out when the malfunction is not present. The light will come on each time a malfunction is detected (may flicker on/off). The light stays on when the system is displaying the diagnostic routine. The dash mounted digital display panel, either the Electronic Climate Control (ECC) or Driver's Information Center (DIC), can be temporarily directed to display trouble codes stored in the onboard computer.
1980s DIAGNOSTIC DISPLAY
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
Turn the ignition "ON". Engine can be either OFF or RUNNING. Depress the "OFF" and "WARMER" buttons on the ECC panel simultaneously and hold until "--" appears. "88" will then be displayed which indicated the beginning of the diagnostic readout. Trouble codes will be displayed on the digital ECC panel beginning with the lowest numbered code. Note that the MPG panel goes blank when the system is displaying as the diagnostic mode.
HOW TO "CLEAR" TROUBLE CODES
Trouble codes stored in the ECM's memory may be cleared (erased) by entering the diagnostic mode and then depressing the "OFF" and "HI" button simultaneously. Hold until "00" appears. After "00" is displayed the ECM will display "70".
HOW TO "EXIT" DIAGNOSTIC MODE
To get out of the diagnostic mode, depress any of the ECC "function" keys (Auto, Econ, etc. except Rear Defog) or turn ignition switch off for 10 seconds. Trouble codes are not erased when this is done. The temperature setting will reappear in the display panel.
Additional information on Trouble Codes and Diagnostic Procedures specific to the Early 1980s Cadillacs.
1990s DIAGNOSTIC DISPLAY OBD-1 Equipped Vehicles
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
Turn ignition "ON." Engine can be either OFF or RUNNING. Depress the "OFF" and "WARMER" buttons on the Climate Control Center (CCC) simultaneously and hold until the segment check appears on the Instrument Panel Cluster (IPC). After entering On-Board Diagnostics, a segment check is automatically performed and then any trouble code stored in computer memory will be displayed. Codes may be stored for the Powertrain Control Module (PCM), Instrument Panel Cluster (IPC), Air Conditioning Programer (ACP), Supplemental Inflatable Restraint (SIR) Traction Control System (TCS) or Road Sensing Suspension (RSS) systems.
Each trouble code consists of the system abbreviation: (P: Powertrain, PCM), (E: Engine, ECM), (I: Instrument Panel Cluster , IPC), (A: Air Conditioning, ACP), (R: Supplemental Inflatable Restraint - Air Bags, SIR), (T: Traction Control - Anit-Lock Brakes, TCS), (S: Road Sensing Suspension, RSS), a three digit code identifier, and the letter C or H. All codes for each system are displayed together, in the order of their three digit number (lowest first). The final digit of the code, a "C" or "H" is used to indicate whether the code is Current or History. A "C" means the fault was still present the last time the diagnostic test was run, while "H" means the failure was not present the last time the code was tested for.
If no codes are present for a system, a "NO X CODE" message (with "X" being the system i.e. E, I, A, R, T or S) will be displayed. If the communication line to a component is not operating, a "NO X DATA" message will be displayed, indicating that the IPC could not communicate with that system.
HOW TO "CLEAR" TROUBLE CODES
Selection of "CLEAR CODES?" test will result in the message "CODES CLEARED" being displayed along with the selected systems name. This message will appear for 3 seconds and then return to the next available test type.
HOW TO "EXIT" DIAGNOSTIC MODE
To get out of the diagnostic mode anytime during the test, depress the "AUTO" or "DEFOG" button, or turn the ignition switch "OFF." Trouble codes are not erased if this is done prior to selecting "CODES CLEARED."
Additional information on Trouble Codes and Diagnostic Procedures specific to the Early-1990s OBD-I Cadillacs.
Mid-1990s Cadillac Fleetwood Using the On-Board Diagnostics
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
With the ignition in the "RUN" position (engine does not necessarily need to be running, but it will work either way). Push (and hold) "OFF" and "WARMER" simultaneously on the Electronic Climate Control (ECC) until all telltales lights illuminate (segment check). Release the "OFF" and "WARMER" buttons. System is now in diagnostic mode. "00" (zero-zero) should now be displayed. This is the pointer. Pressing "OUTSIDE TEMP" will allow you to display the corresponding code for the pointer. Use the "FAN SPEED" override switch (UP/DOWN) to increment or decrement the pointer number. Pressing "AUTO" or turning the ignition switch "OFF" exits diagnotic mode. Pointers 00-04 contain the stored trouble codes.
"00" = Powertrain Control Module (PCM) codes "01" = "02" = Heating, Ventilation and Air-Conditioning (HVAC) codes "03" = "04" = Anti-lock Brake/Traction Control System (ABS/TC) Codes
HOW TO "CLEAR" TROUBLE CODES
A code can be cleared by press the "OFF" button while that particular code is displayed.
To get out of the diagnostic mode, depress any of the "ECON" or "DEFOG" buttons, or turn ignition switch off for 10 seconds. Trouble codes are not erased when this is done. The temperature setting will reappear in the display panel.
Additional information on Trouble Codes and Diagnostic Procedures specific to the Mid-1990s LT1 equipped Cadillac Fleetwoods.
1990s DIAGNOSTIC DISPLAY OBD-2 Equipped Vehicles
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
Turn ignition "ON." Engine can be either OFF or RUNNING. For cars equipped with the Digital Instrument Panel Display (Digital IPC):
Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated For cars equipped with the Analog Instrument Panel Display (Analog IPC):
Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons. After the segment display test, the driver message center displays all set DTC, current and history, in the following order:
PCM DTC IPC DTC ACM DTC SDM DTC TCS DTC PZM DTC IRC DTC RFA DTC CCP DTC MSM DTC MMM DTC PHN DTC The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.
On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.
HOW TO "EXIT" DIAGNOSTIC MODE
To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF."
Additional information on Trouble Codes and Diagnostic Procedures specific to the 1990 OBD-II Cadillacs.
2000s DIAGNOSTIC DISPLAY
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
Turn ignition "ON." Engine can be either OFF or RUNNING. Depress the "ON/OFF" button and the "UP ARROW" end of the info button on the driver information center simultaneously for a few seconds. All the dashboard lights will illuminate, including the segments of the DIC display. You are then presented with text.
You can cycle through different questions using the UP and DOWN arrows on the info button.
HOW TO "EXIT" DIAGNOSTIC MODE
To exit the diagnostic mode anytime during the test turn the ignition switch "OFF."
Additional information on Trouble Codes and Diagnostic Procedures specific to the 2000 OBD-II Cadillacs.
ULTRASONIC REAR PARKING ASSIST DIAGNOSTIC DISPLAY
Using the 3 indicators on the rear parking assist display the system is capable of displaying diagnostic trouble codes. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the Ultrasonic Read Parking Assist (URPA) system under this condition.
HOW TO "ENTER" DIAGNOSTIC MODE
To enter diagnostic mode, proceed as follows:
Short the rear parking assist diagnostic connector to ground while the vehicle is in PARK. Turn the ignition ON. Place foot on the brake. Shift the vehicle into REVERSE within 5 seconds. If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON, the diagnostic mode will still be initiated. However, a reverse input wiring fault will be registered as shown in the Diagnostic Indicator table below. When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system.
Diagnostic Indicators
State/Fault Location Amber Outside Amber Middle Red Outside Start of Diagnostics ON OFF ON RR Corner Object Sensor and Wiring ON OFF OFF RR Middle Object Sensor and Wiring ON ON OFF LR Middle Object Sensor and Wiring OFF ON ON LR Corner Object Sensor and Wiring OFF OFF ON Chime Warning Wiring OFF ON OFF Reverse Input Wiring OFF FLASHES OFF Sensor Supply Voltage Circuit and FLASHES FLASHES FLASHES Sensor Low Reference Circuit
HOW TO "CLEAR" TROUBLE CODES
The rear parking assist diagnostic sequences may be cleared in one of the following ways:
Drive the vehicle forward at least 24 km/h (15 mph). Stop the vehicle. Turn the ignition OFF. Turn the ignition ON. Place foot on the brake. Shift the vehicle into REVERSE within five seconds. Turn the ignition OFF. The sequences will not clear if the rear parking assist diagnostic connector is grounded.
MANUFACTIRE CODES (CADILLAC):
DTC 01 - General Sensor Fault DTC 02 - Instantaneous Battery Voltage Out of Range DTC 03 - Filtered Battery Voltage Out of Range DTC 04 - Compressor Relay Short to Ground/Open DTC 05 - Compressor Relay Short to Battery DTC 06 - Exhaust Valve Short to Ground/Open Circuit DTC 07 - Exhaust Valve Short to Battery DTC 08 - Warning Lamp Short to Ground/Open Circuit DTC 09 - Warning Lamp Short to Battery DTC 10 - Inside Air Temperature Sensor Voltage Low DTC 10 - Intake Accumulator Fault DTC 11 - Driver Seat Forward/Backward Motor Inop DTC 11 - Exhaust Accumulator Fault DTC 11 - Inside Air Temperature Sensor Open Circuit DTC 11 - Transponder Key Problem DTC 12 - Consecutive Intake Malfunction DTC 12 - Driver Seat Recliner Motor Inoperative DTC 12 - LH Air Outlet Sensor Voltage Low DTC 12 - Wrong Transponder Key DTC 12 - Diagnostic System Check (Escalade) DTC 13 - Driver Air Bag Deployment Loop Short to GND DTC 13 - Immobilizer Not Programmed DTC 13 - LH Air Outlet Sensor Open Circuit DTC 14 - Coolant Temp Voltage Low DTC 14 - Driver Pretens Deployment Loop Short to GND DTC 14 - No Transponder Key Programmed DTC 14 - RH Air Outlet Sensor Voltage Low DTC 15 - Driver Air Bag Deploy. Loop Short to V DTC 15 - RH Air Outlet Sensor Open Circuit DTC 15 - Vehicle Speed Signal Voltage Low DTC 16 - Driver Pretens Deploy Loop Short to Voltage DTC 16 - Driver Seat Front Height Motor Inoperative DTC 16 - Int Air Mix Door Mtr Volts Low/Open Circuit DTC 16 - Vehicle Speed Signal Voltage High DTC 17 - Driver Seat Rear Height Motor Inoperative DTC 17 - Interior Air Mix Door Motor Voltage High DTC 17 - No Engine Request Received DTC 18 - Driver Side Mirror Circuit DTC 18 - LH Air Mix Door Mtr Volts Low/Open Circuit DTC 18 - MIL Circuit DTC 19 - Inside Mirror Circuit DTC 19 - LH Air Mix Door Motor Voltage High DTC 20 - Passenger Side Mirror Circuit DTC 20 - RH Air Mix Door Mtr Volts Low/Open Circuit DTC 21 - Driver Seat Adjuster Switch Inoperative DTC 21 - No Speed Signal DTC 21 - RH Air Mix Door Motor Voltage High DTC 21/31 - Courtesy Lamps Feed Shorted to Ground (Escalade) DTC 22 - Floor Air Mix Dr Mtr Voltage Low/Open Circuit DTC 22 - Solenoid Circuit Short to Ground/Open DTC 22/32 - Courtesy Lamps Return Shorted to Battery (Escalade) DTC 23 - Floor Air Mix Door Motor Voltage High DTC 23 - Passenger Air Bag Deployment Loop Short to GND DTC 23 - Power Steering Control Module Malfunction DTC 23/33 - RAP Feed Shorted to Ground or Battery (Escalade) DTC 24 - Def Air Mix Door Mtr Volts Low/Open Circuit DTC 24 - Passenger Pretens Deployment Loop Short to GND DTC 24/34 - Seatbelt Indicator Shorted to Ground or Battery (Escalade) DTC 25 - Defrost Air Mix Door Motor Voltage High DTC 25 - Passenger Air Bag Deploy. Loop Short to Voltage DTC 25/35 - Security Indicator Status (Escalade) DTC 26 - Passenger Pretens Deploy. Loop Short to Voltage DTC 27 - Blower Motor Voltage Low or Open Circuit DTC 28 - Air Circ. Valve Voltage Low or Open Circuit DTC 29 - Air Circulation Valve Voltage High DTC 30 - Heating Cut-Off Valve Volts Low or Open Circuit DTC 31 - Driver Air Bag Deploy. Loop Resistance High DTC 31 - Heating Cut-Off Valve Voltage High DTC 32 - Driver Air Bag Deploy. Loop Resistance Low DTC 32 - Rear Window Defog Signal Voltage Low DTC 33 - Passenger Air Bag Deploy. Loop Resistance High DTC 33 - Rear Window Defog Signal Voltage Open Circuit DTC 34 - Passenger Air Bag Deploy. Loop Resistance Low DTC 34 - Rear Window Defogger Open Circuit DTC 35 - A/C Request Signal Voltage High DTC 35 - Driver Pretens Deploy. Loop Resistance High DTC 36 - A/C Request Signal Voltage Low DTC 36 - Driver Pretens Deploy. Loop Resistance Low DTC 37 - Heater and A/C Control Switch Stuck DTC 37 - Passenger Pretens Deploy. Loop Resistance High DTC 38 - Passenger Pretens Deploy. Loop Resistance Low DTC 38 - Solar/Twilight Sensor Supply Voltage Low DTC 39 - Solar/Twilight Sensor Supply Voltage High DTC 40 - Solar/Twilight Sensor GND Short to Voltage DTC 41 - Last Message Received Valid (Escalade) DTC 42 - Last Message Received Invalid (Escalade) DTC 43 - Last Message Received with Sumcheck Error (Escalade) DTC 43 - Warning Lamp Circuit Short to Voltage DTC 44 - Warning Lamp Circuit Open or Short to GND DTC 44 - Last Message Received with Encryption Error (Escalade) DTC 45 - Receiver Processing in 20 Second Lockout (Escalade) DTC 50 - Seat Adjuster Memory Module Malfunction DTC 50, 51, or 55 - Sunroof Actuator Malfunction DTC 51 - Replace Heater and A/C Control DTC 51 - Reprogram Cluster or Cluster Malfunction DTC 52 - Heater and A/C Control Not Programmed DTC 52 - Reprogram Cluster DTC 52 - SDM Not Configured DTC 53 - Configuration Mismatch DTC 55 - Internal SDM Failure DTC 55 - Replace Heater and A/C Control DTC 55 - Seat Adjuster Memory Module Malfunction DTC 55 - Theft Deterrent Module Malfunction DTC 55 - Begin Configuration Display (Escalade) DTC 56 - SDM Not Reusable DTC 65 - Passenger Air Bag Deployment Commanded DTC 66 - Driver Air Bag Deployment Commanded DTC 67 - Pretensioner Only Deployment Commanded DTC 68 - Driver Side Air Bag Deployment Commanded DTC 69 - Passenger Side Air Bag Deployment Commanded DTC 71 - Driver Side Impact Sensor Comms Invalid DTC 73 - Driver Side Impact Sensor Short to Voltage DTC 74 - Driver Side Impact Sensor Short to Ground DTC 75 - Driver Side Air Bag Short to Ground DTC 76 - Driver Side Air Bag Short to Voltage DTC 77 - Driver Side Air Bag Deploy Loop Resist High DTC 78 - Driver Side Air Bag Deploy Loop Resist. Low DTC 81 - Passenger Side Impact Sensor Comms Invalid DTC 83 - Passenger Side Impact Sensor Short to Voltage DTC 84 - Passenger Side Impact Sensor Short to Ground DTC 85 - Passenger Side Air Bag Short to Ground DTC 86 - Passenger Side Air Bag Short to Voltage DTC 87 - Passenger Side Air Bag Deploy. Loop Resist High DTC 88 - Passenger Side Air Bag Deploy. Loop Resist. Low DTC 97 - ONSTAR DCO Link Open or Short to Voltage DTC 98 - ONSTAR DCO Link Short to Ground DTC 167 - Fuel Gauge Voltage Low DTC 168 - Fuel Gauge Voltage High DTC 169 - Outside Temperature Sensor Voltage Low DTC 171 - Outside Temperature Sensor Open Circuit
BODY CODES
DTC - DTC Descriptor (Modules that sets the DTC) B0001 - PCM Discrete Input Speed Signal Error B0004 - PCM Discrete Input Speed Signal Not Present B0005 - In Park Switch Circuit Malfunction B0012 - Right Front/Passenger Frontal Deployment Loop Circuit B0013 - Right Front/Passenger Frontal Deployment Loop Circuit B0014 - Right Front/Passenger Frontal Deployment Loop Circuit B0016 - Right Front/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low B0017 - Right Front/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Open B0018 - Right Front/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range B0022 - Left Front/Driver Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low B0024 - Left Front/Driver Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range B0026 - Left Front/Driver Frontal Deployment Loop (Single Stage or Stage 1) Open B0028 - Right Front/Passenger Side Deployment Loop Resistance Low B0029 - Right Front/Passenger Side Deployment Loop Open B0030 - Right Front/Passenger Side Deployment Loop Short to Ground/Voltage Out of Range B0035 - ADS Closed/Shorted to Ground B0036 - ADS Open/Missing/Shorted to Battery B0037 - AUX switch closed/shorted to ground B0038 - AUX switch open/shorted to battery B0040 - Left Front/Driver Side Deployment Loop Resistance Low B0041 - Left Front/Driver Side Deployment Loop Open B0042 - Left Front/Driver Frontal Deployment Loop Circuit B0043 - Left Front/Driver Frontal Deployment Loop Circuit B0044 - Left Front/Driver Frontal Deployment Loop Circuit B0045 - Left Front Side Deploy Loop Short to Ground/Voltage Out of Range B0051 - Deployment Commanded B0053 - Deployment Commanded with Loop Malfunctions Present B0057 - Right Front/Passenger Pretensioner Deployment Loop Resistance Low B0058 - Right Front/Passenger Pretensioner Deployment Loop Open B0059 - Right Front/Passenger Pretensioner Deployment Loop Short to Ground/Voltage Out of Range B0061 - Roof Rail Module-Left Deployment Loop Circuit B0062 - Roof Rail Module-Left Deployment Loop Circuit B0064 - Left Front/Driver Pretensioner Deployment Loop Resistance Low B0065 - Left Front/Driver Pretensioner Deployment Loop Open B0066 - Left Front/Driver Pretensioner Deployment Loop Short to Ground/Voltage Out of Range B0068 - Roof Rail Module-Left Deployment Loop Circuit B0069 - Roof Rail Module-Right Deployment Loop Circuit B0070 - Roof Rail Module-Right Deployment Loop Circuit B0071 - Roof Rail Module-Right Deployment Loop Circuit B0073 - Supplemental Deployment Loop #1 Resistance Low B0074 - Supplemental Deployment Loop #1 Open B0075 - Supplemental Deployment Loop #1 Short to Ground/Voltage Out of Range B0077 - Left Front/Driver Side Impact Sensor (SIS) Malfunction B0078 - Right Front/Passenger SIS Malfunction B0079 - Incorrect Left Front/Driver SIS Installed B0080 - Discard Left Front/Driver SIS B0081 - Incorrect Right Front/Passenger SIS Installed B0082 - Discard Right Front/Passenger SIS B0086 - Supplemental Deployment Loop #2 Resistance Low B0087 - Supplemental Deployment Loop #2 Open B0088 - Supplemental Deployment Loop #2 Short to Ground/Voltage Out of Range B0090 - Active switch voltage out of range B0091 - Active switch: wrong state B0092 - PPS passenger detection error B0093 - PPS/CPS self-test malfunction B0094 - CPS childseat detection error B0095 - SDM-PPS/CPS mismatch malfunction B0100 - Electronic Front End Sensor 1 Performance B0101 - Electronic Front End Sensor 1 Performance B0102 - Electronic Front End Sensor 1 Performance B0103 - Electronic Frontal Sensor Circuit B0104 - Electronic Frontal Sensor Circuit B0105 - Electronic Frontal Sensor Circuit B0109 - Side impact module-Left Rear deployment loop resistance is less than 1.3 ohms B0110 - Side impact module-Left Rear high circuit is less than 2.4 volts B0111 - Side impact module-Left Rear high and/or low circuits is short to ground or short to voltage B0112 - Side impact module-Right Rear deployment loop resistance is less than 1.3 ohms B0113 - Side impact module-Right Rear high circuit is less than 2.4 volts B0114 - Side impact module-Right Rear high and/or low circuits is short to ground or short to voltage B0126 - Right Panel Discharge Temperature Fault B0130 - Air Temperature/Mode Door Actuator Malfunction B0131 - Right Heater Discharge Temperature Fault B0145 - Auxiliary HAVC Actuator Circuit B0159 - Outside Air Temperature Sensor Circuit Range/Performance B0160 - Ambient Air Temperature Sensor Circuit B0162 - Ambient Air Temperature Sensor Circuit B0164 - Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance B0169 - In-car Temp Sensor Failure (passenger -not used) B0174 - Output Air Temperature Sensor #1 (Upper; Single or LH) Circuit Range/Performance B0179 - Output Air Temperature Sensor #2 (Lower; Single or LH) Circuit Range/Performance B0183 - Sunload Sensor Circuit B0184 - Solar Load Sensor #1 Circuit Range (sunload) B0188 - Sunload Sensor Circuit B0189 - Solar Load Sensor #2 Circuit Range (sunload) B0229 - HVAC Actuator Circuit B0248 - Mode Door Inoperative Error B0249 - Heater/Defrost/AC Door Range Error B0263 - HVAC Actuator Circuit B0268 - A/I Door Inoperative Error B0269 - Air Inlet Door Range Error B0283 - Electric Rear Defrost Circuit B0285 - Electric Rear Defrost Circuit Low (BCM) B0286 - Electric Rear Defrost Circuit High (BCM) B0408 - Temperature Control #1 (Main/Front) Circuit Malfunction B0409 - Air Mix Door #1 Range Error B0414 - Air Temperature/Mode Door Actuator Malfunction B0418 - HVAC Actuator Circuit B0419 - Air Mix Door #2 Range Error B0423 - Air Mix Door #2 Inoperative Error B0424 - Air Temperature/Mode Door Actuator Malfunction B0428 - Air Mix Door #3 Inoperative Error B0429 - Temperature Control #3 Rear Circuit Range/Performance B0510 - RH Panel Discharge Temp Sensor Failure B0515 - RH Heater Discharge Temp Sensor Failure B0520 - Rear Discharge Temp Sensor Failure B0530 - Fuel Level Sensor Stuck B0532 - Fuel Sensor Shorted To Ground B0533 - Fuel Sensor Open/Shorted To B+ B0540 - Speedometer Circuit B0560 - Tachometer Circuit B0688 - Security System Indicator Circuit High B0689 - Security System Indicator Circuit Open (BCM) B0728 - P (park) Indicator Circuit High (BCM) B0729 - P (park) Indicator Circuit Open (BCM) B0733 - R (reverse) Indicator Circuit High (BCM) B0734 - R (reverse) Indicator Circuit Open (BCM) B0738 - N (neutral) Indicator Circuit High (BCM) B0739 - N (neutral) Indicator Circuit Open (BCM) B0748 - D (drive) Indicator Circuit High (BCM) B0749 - D (drive) Indicator Circuit Open (BCM) B0768 - Service Indicator Circuit High B0770 - All Wheel Drive (AWD) Indicator Circuit B0775 - Four Wheel Drive High Range (4HI) Indicator Circuit B0780 - Four Wheel Drive Low Range (4LO) Indicator Circuit B0785 - Two Wheel Drive High Range (2HI) Indicator Circuit B0790 - Transfer Case Neutral Indicator Circuit B0846 - +5 Volt Reference Out of Range B0856 - Battery 2 Out of Range B0951 - Dimming Circuit B1000 - ECU Malfunction B1001 - Option Configuration Error B1004 - Keep Alive Memory (KAM) B1008 - Calibration Data Not Programmed (BCM) B1007 - EEPROM Write Error B1009 - EEPROM Checksum Error B1013 - ROM Checksum Error B1014 - Program ROM Checksum Error B1015 - Passenger Deploy. Loop Resistance High B1016 - Passenger Deployment Loop Resistance Low B1017 - Passenger Deployment Loop Open B1018 - Passenger Deployment Loop Short to GND B1019 - Passenger Deploy. Loop Short to Voltage B1021 - Driver Deployment Loop Resistance High B1022 - Driver Deployment Loop Resistance Low B1023 - Integral Switch Performance B1024 - Driver Deployment Loop Short to Ground B1025 - Driver Deployment Loop Short to Voltage B1026 - Driver Deployment Loop Open B1035 - Discr. Sensor Closed or Short to GND B1036 - Discr. Sensor Open or Short to Voltage B1045 - Audio Output 3 Circuit (Radio) B1051 - Frontal Air Bag and Preten Deployment B1053 - Deployment Commanded w/Loop Malfunction B1054 - Infl Rst IP Module Switch Circuit Failure B1055 - Audio Output 4 Circuit (Radio) B1061 - Lamp Circuit Failure B1071 - Internal SDM Failure B1115 - Passenger Deploy. Loop Resistance High B1116 - Passenger Deploy. Loop Resistance Low B1117 - Passenger Deployment Loop Open B1121 - Driver Deployment Loop Resistance High B1122 - Driver Deployment Loop Resistance Low B1124 - Driver/Passenger Deploy. Loop Short to GND B1125 - Driver/Pass Deploy Loop Short to Voltage B1126 - Driver Deployment Loop Open B1131 - Passenger Pretensioner Loop Resistance High B1132 - Passenger Pretensioner Loop Resistance Low B1134 - Passenger Pretensioner Loop Open B1135 - Discr. Sensor Closed or Short to GND B1136 - Discr. Sensor Open or Short to Voltage B1141 - Driver Pretensioner Loop Resistance High B1142 - Driver Pretens. Deploy. Loop Res. Low B1144 - Driver/Pass Pretens. Loop Short to GND B1145 - Driver/Pass Pretens. Loop Short to Volt B1146 - Driver Pretensioner Loop Open B1147 - Driver Side Air Bag System Malfunction B1148 - Passenger Side Air Bag System Malfunction B1151 - Deployment Commanded - Frontal B1152 - Data Area Full B1153 - Deployment Commanded w/Loop Malfunction B1155 - SDM Calibration Mismatch B1159 - Loss of Serial Data-Key Not Received B1160 - Loss of Serial Data - VIN Not Received B1161 - Lamp Circuit Failure B1163 - Loss of Serial Data-No Lamp Response B1171 - Internal SDM Failure B1245 - CD Changer Not Responding B1259 - The digital radio receiver detects an antenna fault B1271 - Theft Lock Enabled - VIN does not match expect value B1310 - Ambient Air Temperature Sensor Failure B1311 - Outside Air Temp Sensor Short Circuit B1312 - High Side Temp Sensor Open Circuit B1313 - High Side Temp Sensor Short Circuit B1314 - Evaporator Inlet Temp Sensor Open Circuit B1315 - Evaporator Inlet Temp Sensor Short Circuit B1316 - In Car Temperature Sensor Open Circuit B1317 - In Car Air Temperature Sensor B1318 - LH Sun Load Sensor Fault B1319 - Sunload Sensor Short Circuit B1321 - A/C Low Side Temperature Sensor Fault B1324 - A/C Refrigerant Overpressure B1327 - Vehicle system voltage below 9.0 volts B1328 - Vehicle system voltage is greater than 15.9 volts B1328 - RH Sun Load Sensor Fault B1330 - Left A/C Discharge Sensor Fault B1331 - Right A/C Discharge Sensor Fault B1332 - Left Heater Discharge Sensor Fault B1333 - Right Heater Discharge Sensor Fault B1336 - Memory seat module (MSM) current exceeds 81 amps B1340 - Air Mix Door One Movement Fault B1341 - Air Mix Door Two Movement Fault B1343 - Air Inlet Door Movement Fault B1344 - HeaterDefrost/AC Door Movement Fault B1347 - Very Low A/C Refrigerant Warning B1348 - Very Low A/C Refrigerant Pressure B1350 - Engine Coolant Over-Temperature B1372 - Device Ignition 1 Circuit Low B1375 - Device Ignition 3 (ON) Circuit B1377 - Device Ignition 3 (ON) Circuit Low (BCM) B1378 - Device Ignition 3 (ON) Circuit High (BCM) B1382 - Device Ignition ACCESSORY Circuit Low B1390 - Device Voltage Reference Input Circuit Malfunction B1396 - Device Voltage Reference Output 1 Circuit Range Performance B1399 - Loss of KDD Communications B1420 - Seat Switch Input Status B1422 - Device Power Moding Malfunction B1438 - IPC High Voltage Output Overcurrent to IPM B1440 - Power Mode Master Input Circuits Mismatch B1480 - Battery Rundown Protection Circuit Malfunction B1482 - Battery Rundown Protection Circuit Low (BCM) B1513 - Voltage falls below 10.5 volts with the engine is running B1514 - Voltage is greater than 16.2 volts with the engine running B1550 - Mirror Left Front or Right Front Select Switch Circuit B1552 - Keep Alive Memory (KAM) Error B1556 - IPC EEPROM Odo/Configuration Error B1557 - EEPROM Calibration Error B1558 - BCM EPROM Checksum Error B1586 - Mirror Horiz. Pos Sensor-Out of Range/Open B1591 - Mirror Vert. Pos Sensor-Out of Range/Open B1652 - Loss of Keep Alive Memory (KAM) B1656 - EEPROM Write Error B1658 - EEPROM Checksum Error B1697 - Mirror Switch L Input Shorted to Ground B1698 - Mirror Switch L Up Input Stuck High B1702 - Mirror Switch L Input Shorted to Ground B1703 - Mirror Switch L Down Input Stuck High B1707 - Mirror Switch R Input Shorted to Ground B1708 - Mirror Switch R Up Input Stuck High B1710 - Switched Antenna Error B1712 - Mirror Switch R Input Shorted to Ground B1713 - Mirror Switch R Down Input Stuck High B1717 - Mirror Power Fold Control Switch Shorted Low B1718 - Power Folding Mirror Switch Input Circuit High B1720 - Mirror Up and Down Control Switch Circuit B1721 - Mirror Left and Right Control Switch Circuit B1723 - Mirror Motor Control Circuit 1 Performance B1724 - Mirror Motor Control Circuit 2 Performance B1735 - Driver Seat Front Up Switch Circuit Malfunction (Power Seat Switch Circuit) B1740 - Driver Seat Front Down Switch Circuit Malfunction B1745 - Driver Seat Rear Up Switch Circuit Malfunction B1750 - Driver Seat Rear Down Switch Circuit Malfunction B1755 - Driver Seat Asm Forward Switch Circuit Malfunction B1760 - Driver Seat Asm Rearward Switch Circuit Malfunction B1760 - CD Changer Not Responding B1761 - CD changer tracking fault B1762 - CD changer focus error B1763 - CD player load/unload fault B1770 - Cassette not responding B1771 - Cassette tape slow B1772 - Cassette head cleaning required B1780 - Theft Lock Enabled B1802 - Inadv. Pwr Short to Ground B1805 - Ignition Switch Problem B1815 - Driver Recline Forward Switch Circuit Malfunction B1820 - Driver Recline Rearward Switch Circuit Malfunction B1825 - Driver Recline Sensor Circuit Malfunction B1830 - Driver Lumbar Forward Switch Circuit Malfunction B1835 - Driver Lumbar Rearward Switch Circuit Malfunction B1840 - Driver Lumbar Up Switch Circuit Malfunction B1845 - Driver Lumbar Down Switch Circuit Malfunction B1850 - Driver Lumbar Horiz Sensor Circuit Malfunction B1860 - Driver Lumbar Vert Sensor Circuit Malfunction B1870 - Driver Belt Tower Up Switch Circuit Malfunction B1875 - Driver Belt Tower Down Switch Circuit Malfunction B1900 - Driver Belt Tower Vert Sensor Circuit Malfunction B1910 - Generator L-Terminal Open Circuit B1911 - Generator L-Terminal Problem B1913 - Heated Seat Switch - Mode Input Shorted to Battery B1918 - Heated Seat Switch - Temperature Input Shorted to Battery B1970 - Exterior Lamp Power B1971 - Inadvertent Power B1972 - Low Power Driver Fault B1973 - High Power Control Fault B1981 - Battery Voltage Low B1982 - Device Power Circuit High B1983 - Device Power Circuit Low B2075 - Lumbar Switch Control Circuit B2080 - Lumbar Switch Control Circuit B2085 - Lumbar Switch Control Circuit B2090 - Lumbar Switch Control Circuit B2101 - Recline Aft Switch Failed B2102 - Recline Forward Switch Failed B2103 - Rear Vertical Down Switch Failed B2104 - Rear Vertical Up Switch Failed B2105 - Horizontal Aft Switch Failed B2106 - Horizontal Forward Switch Failed B2107 - Front Vertical Down Switch Failed B2108 - Front Vertical Up Switch Failed B2109 - Lumbar Aft Switch Failed B2110 - Lumbar Forward Switch Failed B2111 - Lumbar Down Switch Failed B2112 - Lumbar Up Switch Failed B2115 - Recline Sensor Failed B2116 - Rear Vertical Sensor Failed B2117 - Horizontal Sensor Failed B2118 - Front Vertical Sensor Failed B2119 - Lumbar Forward/Aft Sensor Failed B2120 - Lumbar Up/Down Sensor Failed B2130 - Driver Memory 1 Select Switch Circuit Malfunction B2131 - Driver Memory 2 Select Switch Circuit Malfunction B2132 - Driver Memory Exit Exit/Off Switch Circuit Malfunction B2133 - Driver Memory Set Switch Circuit Malfunction B2140 - Mirror Up Control Switch Circuit Malfunction B2141 - Mirror Down Control Switch Circuit Malfunction B2142 - Mirror Left Control Switch Circuit Malfunction B2143 - Mirror Right Control Switch Circuit Malfunction B2144 - Left Front Mirror Vertical Position Sensor Circuit Low B2145 - Left Front Mirror Vertical Position Sensor Circuit High B2146 - Left Front Mirror Horizontal Position Sensor Circuit Low B2147 - Left Front Mirror Horizontal Position Sensor Circuit High B2148 - Right Front Mirror Vertical Position Sensor Circuit Low B2149 - Right Front Mirror Vertical Position Sensor Circuit High B2150 - Right Front Mirror Horizontal Position Sensor Circuit Low B2151 - Right Front Mirror Horizontal Position Sensor Circuit High B2175 - Tilt/Telescope Module Manual Switch Fail B2200 - Left Front Window Switch Stuck in Up Position B2201 - Left Front Window Switch Stuck in Down Position B2202 - Right Front Window Switch Stuck in Up Position B2203 - Right Front Window Switch Stuck in Down Position B2204 - Left Rear Window Switch Stuck in Up Position B2205 - Left Rear Window Switch Stuck in Down Position B2206 - Right Rear Window Switch Stuck in Up Position B2207 - Right Rear Window Switch Stuck in Down Position B2212 - Right Front Switch on Left Front Door Stuck Up Position B2213 - Right Front Switch on Left Front Door Stuck Down Position B2214 - Left Rear Switch on Left Front Door Stuck Up Position B2215 - Left Rear Switch on Left Front Door Stuck Down Position B2216 - Right Rear Switch on Left Front Door Stuck Up Position B2217 - Right Rear Switch on Left Front Door Stuck Down Position B2220 - Left Front Door Lock/Unlock Switch Stuck in Lock B2221 - Left Front Door Lock/Unlock Switch Stuck UnLock B2222 - Right Front Door Lock/Unlock Switch Stuck in Lock B2223 - Right Front Door Lock/Unlock Switch Stuck UnLock B2224 - Left Rear Door Lock/Unlock Switch Stuck in Lock B2226 - Right Rear Door Lock/Unlock Switch Stuck in Lock B2240 - Memory 1 Switch Failed B2241 - Memory 2 Switch Failed B2242 - Memory Exit Switch Failed B2243 - Memory Set Switch Failed B2310 - Hand Set Failure B2311 - TRU Failure B2312 - Software Failure B2355 - Driver Front Vertical Sensor Malfunction B2365 - Driver Rear Vertical Sensor Malfunction B2375 - Driver Seat Asm Horiz Sensor Circuit Malfunction B2419 - Twilight Photocell Circuit Problem B2420 - Twilight Delay Pot Failure B2422 - Interior Lamp Rheostat Failure B2425 - Seat Heater Circuit B2430 - Seat Heater Circuit B2435 - Seat Back Heater Sensor B2440 - Seat Back Heater Sensor B2455 - Open or short in Cellular Phone Microphone Circuit B2460 - Navigation Antenna Selector Circuit High Current B2461 - Navigation ECU Synchronous Signal Error B2462 - GPS Signal Error B2463 - Navigation CD Player - No Disk B2464 - Navigation CD Player - Decoding Error B2465 - Navigation CD Player - Data Error B2466 - Navigation VICS Memory Error B2468 - Navigation Display Head (NDH) Malfunction B2470 - Daytime Running Lamps Fault B2470 - Cellular Phone Antenna Circuit (2000+) B2471 - Interior Lamp Fault B2472 - Low Beam Fault B2473 - High Beam Fault B2474 - Navigation Display Head (NDH) Back Lighting Malfunction B2475 - Navigation Display Head (NDH) Auxiliary Input Malfunction B2476 - Cellular Phone Select Service Switch Malfunction (keypad signal circuit) B2477 - Reverse Lamp Relay Shorted to Ground B2478 - Reverse Lamp Shorted to Battery B2482 - Cellular Phone Select Service Switch Range/Performance B2483 - Global Positioning System (GPS) Antenna Circuit B2484 - Global Positioning System (GPS) Antenna Circuit B2502 - Auto Trans Shift Lock Control Shorted to Ground B2503 - Park Gear (Auto Trans Shift Lock Control) Relay Shorted to Batt B2507 - Voltage from climate control seat module (CCSM) is less than 2.0 volts or greater than 10 volts B2510 - Steering Wheel Controls HVAC Key Stuck B2511 - Steering Wheel Controls Conv Key Stuck B2512 - Strng Wheel Controls Illegal A/D Values B2515 - Strg Whl Cont Illegal Resistance Value B2527 - Front Fog Lamp Circuit Low B2530 - Front Foglamps Control Circuit B2532 - Front Fog Lamps Control Circuit Low (BCM) B2533 - Front Fog Lamps Control Circuit High (BCM) B2540 - Rear Foglamps Control Circuit B2550 - Storage Mode Entered (Backup Lamps Control Circuit) B2556 - Interior Lamp Rheostat Circuit Range B2560 - RKE Message Validation Error B2575 - Headlamp Control Circuit B2577 - Headlamp Relay Output Circuit Low (BCM) B2578 - Headlamp Relay Output Circuit High (BCM) B2580 - Headlamp High Beam Control Circuit B2585 - Parklamp Control Circuit Malfunction B2587 - Park Lamp Relay Output Circuit Low (BCM) B2588 - Park Lamp Relay Output Circuit High (BCM) B2600 - Daytime Running Lamp Control Circuit (BCM) B2602 - Daytime Running Lamp Circuit Low (BCM) B2603 - Daytime Running Lamp Circuit High (BCM) B2610 - Passenger Compartment Dimming 1 Circuit B2615 - Passenger Compartment Dimming 2 Circuit B2620 - Display Dimming Input Circuit B2622 - Display Dimming Pulse Width Modulation (PWM) Input Circuit Low (BCM) B2623 - Display Dimming Pulse Width Modulation (PWM) Input Circuit High (BCM) B2625 - Display Dimming Pulse Width Modulation (PWM) Output Circuit B2627 - Display Dimming Pulse Width Modulation (PWM) Output Circuit Low (BCM) B2628 - Display Dimming Pulse Width Modulation (PWM) Output Circuit High (BCM) B2641 - Delayed Exterior Lighting Ctrl Circuit Range B2645 - Ambient Light Sensor Circuit B2646 - Ambient Light Sensor Circuit Range B2647 - Ambient Light Sensor Circuit Low (BCM) B2662 - Park Lamp Relay Output Circuit Low (BCM) B2697 - Headlamp Washer Request Circuit B2700 - Ignition Shift Interlock Circuit (base number) B2701 - Ignition Shift Interlock Circuit Range/Performance B2702 - Ignition Shift Interlock Circuit Low B2703 - Ignition Shift Interlock Circuit High B2704 - Ignition Shift Interlock Circuit Open B2707 - Gearshift Unlock Circuit Low (BCM) B2708 - Gearshift Unlock Circuit High (BCM) B2710 - PASSKey Open/Shorted Pellet B2711 - PASSKey Open/Shorted Pellet After Good Key B2719 - CTD-Trunk Tamper Switch Fault B2725 - ATC Mode Switch Circuit Malfunction B2732 - Trunk Release Switch Circuit Low B2734 - Coded Key Controller Memory Failure B2743 - Fog Lamp Switch Circuit High (BCM) B2750 - PASSKey Data Communication Failure B2752 - Horn Relay Coil Circuit Low (BCM) B2753 - Horn Relay Coil Circuit High (BCM) B2757 - Driver Memory 1 Select Switch Circuit Low B2762 - Driver Memory 2 Select Switch Circuit Low B2767 - Memory Set Switch Failed Low B2772 - Driver Memory Exit Switch Circuit Low B2780 - Wrong Resistor Before Good B2781 - Wrong Resistor After Good B2782 - PASSKey Pellet Resistance Not Programmed B2783 - Key Code/Password Corrupted in Memory B2805 - Steering Whl Controls HVAC Switch Circuit Malfunction B2810 - Steering wheel controls Entertainment Circuit Malfunction B2815 - Steering Wheel Controls Illegal Resistance Value B2853 - Telescope Forward Switch Circuit Malfunction B2858 - Telescope Rearward Switch Circuit Malfunction B2860 - Telescope Position Sensor Range B2862 - Telescope Position Sensor Low B2873 - Tilt Up Switch Circuit Malfunction B2878 - Tilt Down Switch Circuit Malfunction B2880 - Tilt Position Sensor Range B2882 - Tilt Position Sensor Low B2891 - Tilt/Telescope Motor Over Current B2904 - Tilt/Telescope 4-way Position Switch Circuit Malfunction B2947 - Security System Sensor Power Circuit Low B2948 - Security System Sensor Power Circuit High B2955 - Security System Sensor Data Circuit Malfunction B2957 - Security System Sensor Data Circuit Low B2958 - Security System Sensor Data Circuit High B2960 - Security System Sensor Data Incorrect but Valid B2961 - Key In Ignition Circuit Malfunction B2965 - Key in Ignition Circuit Open (IPC) B3028 - Starter Relay Interface Short to Ground B3029 - Starter Relay Interface Open/Short to B+ B3031 - Key Decoder Device in Assem Learn Mode B3033 - Security System Indicates Tamper B3055 - Key Not Present B3060 - Security System Sensor Data Incorrect but Valid B3064 - Driver Door Key Cylinder Circuit B3069 - Right Front/Left Front Door Key Unlock Circuit Low B3108 - Transmitter Synchronization Failure B3109 - 3 consecutive low battery signals from the same programmed transmitter B3127 - LF Door Only, Unlock Circuit Low (BCM) B3128 - LF Door Only, Unlock Circuit High (BCM) B3132 - All Door Unlock Circuit Low (BCM) B3133 - All Door Unlock Circuit High (BCM) B3137 - All Door Lock Circuit Low (BCM) B3138 - All Door Lock Circuit High (BCM) B3142 - Left Front Unlock Switch Circuit Low B3147 - Passenger Unlock Switch Circuit Low B3152 - Left Front Lock Switch Circuit Low B3157 - Passenger Lock Switch Circuit Low B3172 - Window Up Switch Circuit Low B3177 - Window Down Switch Circuit Low B3182 - Window Switch Circuit B3187 - Window Switch Circuit B3192 - Window Switch Circuit B3197 - Window Switch Circuit B3203 - Rear Window Lockout Switch Input Circuit High B3282 - Window Switch-Express Input Shorted to Ground B3287 - Left Rear Window Switch Express Down Circuit Low B3292 - Right Rear Window Switch Express Down Circuit Low B3282 - Window Switch-Express Input Shorted to Ground B3287 - Window Switch Circuit B3292 - Window Switch Circuit B3377 - Left Front Window Up Switch Circuit Low B3382 - Left Front Window Down Switch Circuit Low B3387 - Right Front Window Up Switch Circuit Low B3392 - Right Front Window Down Switch Circuit Low B3397 - Left Rear Window Up Switch Circuit Low B3410 - AHLD Front Axle Sensor Signal Circuit B3420 - AHLD Rear Axle Sensor Signal Circuit B3452 - Left Rear Window Down Switch Circuit Low B3457 - Right Rear Window Up Switch Circuit Low B3462 - Right Rear Window Down Switch Circuit Low B3467 - Left Front Window Express Down Circuit Low B3472 - Right Front Window Express Down Circuit Low B3477 - Left Rear Window Express Down Circuit Low B3482 - MalfunctionWindow Express Down Circuit Low B3517 - Left Rear Door Switch Express Up/Down Window Contact Shorted to GND B3522 - Right Rear Door Switch Express Up/Down Window Contact Shorted to GND B3527 - Window Lockout Switch Circuit Low B3531 - Auxiliary HAVC Actuator Circuit B3642 - Seat cool temperature switch shorted B3702 - Intermittent Wiper Delay Input Circuit Low (BCM) B3703 - Intermittent Wiper Delay Input Circuit High/Open (BCM) B3708 - Front Washer Motor Input High (BCM) B3713 - Rear Washer Motor Input Circuit High (BCM) B3717 - Front Wiper Relay Drive Circuit Low (BCM) B3718 - Front Wiper Relay Drive Circuit High (BCM) B3722 - Rear Wiper Relay Drive Circuit Low (BCM) B3723 - Rear Wiper Relay Drive Circuit High (BCM) B3761 - HVAC Actuator Circuit B3770 - HVAC Actuator Circuit B3793 - Memory Seat Module Over Current B3801 - Passenger Compartment Lamp Request Circuit B3802 - Parklamps Request Circuit B3808 - Rear Door Lock Relay Circuit B3809 - Rear Door Unlock Relay Circuit B3810 - Washer Relay Circuit B3811 - Washer Relay Circuit B3819 - Left Rear Power Window Up Relay Circuit B3820 - Left Rear Power Window Down Relay Circuit B3821 - Window Lockout Circuit Low B3822 - Right Rear Power Window Up Relay Circuit B3823 - Right Rear Power Window Down Relay Circuit B3824 - Window Lockout Circuit Low B3832 - Window Position Sensor Circuit B3833 - Window Position Sensor Circuit B3905 - Lumbar Switch Control Circuit
All cars and light trucks built and sold in the United States after January 1, 1996 were required to be OBD II equipped. In general, this means all 1996 model year cars and light trucks are compliant, even if built in late 1995. Some 1995 model year vehicles are also equipped with OBDII - although some pre-1996 OBD-II cars are not 100% compliant. Pre-OBD-II cars had connectors in various positions under the dashboard and under the hood. All OBD-II cars have a connector located in the passenger compartment easily accessible from the driver's seat.
Communications Protocols
GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation). There are some variations among imports such as the Cadillac Catera, which is a German Opel derivative, the Catera uses the European ISO 9141 protocol.
Reading OBD-II codes
A cable is plugged into the OBD-II J1962 connector and the other end is connected to a scan tool. A hand-held scan tool is usually limited to one OBD-II system type - there are three basic OBD-II protocols in use, each with minor variations on the communication pattern between the on-board diagnostic computer and the scan tool. In general, Chrysler products and all European and most Asian imports use ISO 9141 circuitry. GM cars and light trucks use SAE J1850 VPW (Variable Pulse Width Modulation), and Fords use SAE J1850 PWM (Pulse Width Modulation) for communication.
General Motors Driving Cycle
A complete driving cycle will perform diagnostics on all monitored systems and can usually be completed in less than fifteen minutes.
Performing a GM OBDII Driving cycle: Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 122°F (50°C) and within 11°F (6°C) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run. Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim. Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 55mph (88km/hr) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed. Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 20 mph (32km/hr). During this time the EGR, Purge and Fuel Trim diagnostics will be performed. Accelerate. Accelerate at 3/4 throttle until 55-60mph (88-96 km/hr). This will perform the same diagnostics as in step 3. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.
Disecting a DTC
How the Diagnostic Trouble Code is created: A DTC is made up of 5 digits. The chart below shows the composition of a DTC. With this information you can easily determine what system to trouble shoot without knowing the exact description of the code.
X X X X X | | | | | | | | B Body ----------+ | | +-- Fault (00 to 99) C Chassis -------+ | | P Powertrain ----+ | | U Network -------+ | +------ 1 Fuel & Air Metering | +------ 2 Fuel & Air Metering (Injector) | +------ 3 Ignition System or Misfire 0 SAE --------------+ +------ 4 Auxiliary Emission Controls 1 MFG --------------+ +------ 5 Vehicle Speed & Idle Control System +------ 6 Computer Output Citcuit +------ 7 Transmission +------ 8 Transmission +------ 9 Reserved +------ 0 Reserved Using the Cadillac on-board diagnostic display you'll also see "IP" for the IPC instrument panel, "AC" for the air conditioning module, "TC" for traction control, "RS" for the road suspension system, "SD" for the air bags, "PZ" for the body control module, "CC" for the cell phone and "RF" for the integrated radio.
Types of DTCs
There are two categories of DTC's that apply to OBDII.
Type A Emissions related. Requests illumination of the MIL after one failed driving cycle. Stores a freeze frame DTC after one failed driving cycle. Type B Emissions related. Sets a Pending Trouble Code after one failed driving cycle. Clears a Pending Trouble Code after one successful driving cycle. Turns on the MIL after two consecutive failed driving cycles. Stores a freeze frame after two consecutive failed driving cycles.
C0000 - Vehicle Speed Information Circuit Malfunction C0035 - Left Front Wheel Speed Circuit Malfunction C0040 - Right Front Wheel Speed Circuit Malfunction C0041 - Right Front Wheel Speed Sensor Circuit Range/Performance (EBCM) C0045 - Left Rear Wheel Speed Circuit Malfunction C0046 - Left Rear Wheel Speed Sensor Circuit Range/Performance (EBCM) C0050 - Right Rear Wheel Speed Circuit Malfunction C0051 - LF Wheel Speed Sensor Circuit Range/Performance (EBCM) C0060 - Left Front ABS Solenoid #1 Circuit Malfunction C0065 - Left Front ABS Solenoid #2 Circuit Malfunction C0070 - Right Front ABS Solenoid #1 Circuit Malfunction C0075 - Right Front ABS Solenoid #2 Circuit Malfunction C0080 - Left Rear ABS Solenoid #1 Circuit Malfunction C0085 - Left Rear ABS Solenoid #2 Circuit Malfunction C0090 - Right Rear ABS Solenoid #1 Circuit Malfunction C0095 - Right Rear ABS Solenoid #2 Circuit Malfunction C0110 - Pump Motor Circuit Malfunction C0121 - Valve Relay Circuit Malfunction C0128 - Low Brake Fluid Circuit Low C0141 - Left TCS Solenoid #1 Circuit Malfunction C0146 - Left TCS Solenoid #2 Circuit Malfunction C0151 - Right TCS Solenoid #1 Circuit Malfunction C0156 - Right TCS Solenoid #2 Circuit Malfunction C0161 - ABS/TCS Brake Switch Circuit Malfunction C0221 - Right Front Wheel Speed Sensor Circuit Open C0222 - Right Front Wheel Speed Signal Missing C0223 - Right Front Wheel Speed Signal Erratic C0225 - Left Front Wheel Speed Sensor Circuit Open C0226 - Left Front Wheel Speed Signal Missing C0227 - Left Front Wheel Speed Signal Erratic C0229 - Drop Out of Front Wheel Speed Signals C0235 - Rear Wheel Speed Signal Circuit Open C0236 - Rear Wheel Speed Signal Circuit Missing C0237 - Rear Wheel Speed Signal Erratic C0238 - Wheel Speed Mismatch C0241 - EBCM Control Valve Circuit C0245 - Wheel Speed Sensor Frequency Error C0254 - EBCM Control Valve Circuit C0265 - EBCM Relay Circuit C0266 - EBCM Relay Circuit C0267 - Pump Motor Circuit Open/Shorted C0268 - Pump Motor Circuit Open/Shorted C0269 - Excessive Dump/Isolation Time C0271 - EBCM Malfunction C0272 - EBCM Malfunction C0273 - EBCM Malfunction C0274 - Excessive Dump/Isolation Time C0279 - Powertrain Configuration Not Valid C0281 - Brake Switch Circuit C0283 - Traction Switch Shorted to Ground C0284 - EBCM Malfunction C0286 - ABS Indicator Lamp Circuit Shorted to B+ C0287 - Delivered Torque Circuit C0288 - Brake Warning Lamp Circuit Shorted to B+ C0290 - Lost Communications With PCM C0292 - Lost Communications With PCM C0291 - Lost Communications With BCM C0297 - Powertrain Configuration Data Not Received C0298 - Powertrain Indicated Traction Control Malfunction C0300 - Rear Speed Sensor Malfunction C0305 - Front Speed Sensor Malfunction C0306 - Motor A or B Circuit C0308 - Motor A/B Circuit Low C0309 - Motor A/B Circuit High C0310 - Motor A/B Circuit Open C0315 - Motor Ground Circuit Open C0321 - Transfer Case Lock Circuit C0323 - T-Case Lock Circuit Low C0324 - T-Case Lock Circuit High C0327 - Encoder Circuit Malfunction C0357 - Park Switch Circuit High C0359 - Four Wheel Drive Low Range (4LO) Discrete Output Circuit C0362 - 4LO Discrete Output Circuit High C0367 - Front Axle Control Circuit High C0374 - General System Malfunction C0376 - Front/Rear Shaft Speed Mismatch C0379 - Front Axle System C0387 - Unable to Perform Shift C0472 - Steering Handwheel Speed Sensor Signal V Low C0473 - Steering Handwheel Speed Sensor Signal V High C0495 - EVO Tracking Error C0498 - Steering Assist Control Actuator Feed Circuit Low C0499 - Steering Assist Control Solenoid Feed Circuit High C0503 - Steering Assist Control Solenoid Return Circuit Low C0504 - Steering Assist Control Solenoid Return Circuit High C0550 - ECU Malfunction - internal write / checksum malfunction C0559 - EEPROM Checksum Error C0563 - Calibration ROM Checksum Error C0577 - Left Front Solenoid Circuit Low C0578 - Left Front Solenoid Circuit High C0579 - Left Front Solenoid Circuit Open C0582 - Right Front Solenoid Circuit Low C0583 - Right Front Solenoid Circuit High C0584 - Right Front Solenoid Circuit Open C0587 - Left Rear Solenoid Circuit Low C0588 - Left Rear Solenoid Circuit High C0589 - Left Rear Solenoid Circuit Open C0592 - Right Rear Solenoid Circuit Low C0593 - Right Rear Solenoid Circuit High C0594 - Right Rear Solenoid Circuit Open C0611 - VIN Information Error C0615 - Left Front Position Sensor Malfunction C0620 - Right Front Position Sensor Malfunction C0625 - Left Rear Position Sensor Malfunction C0628 - Level Control Position Sensor Circuit High C0630 - Right Rear Position Sensor Malfunction C0635 - Left Front Normal Force Circuit Malfunction C0638 - Left Front Normal Force Circuit High C0640 - Right Front Normal Force Circuit Malfunction C0643 - Right Front Normal Force Circuit High C0655 - Level Control Compressor Relay Malfunction C0657 - Level Control Compressor Circuit Low C0658 - Level Control Compressor Circuit High C0660 - Level Control Exhaust Valve Circuit Malfunction C0662 - Level Control Exhaust Valve Circuit Low C0663 - Level Control Exhaust Valve Circuit High C0665 - Chassis Pitch Signal Circuit C0690 - Damper Control Relay Circuit Malfunction C0691 - Damper Control Relay Circuit Range C0693 - Damper Control Relay Circuit High C0695 - Position Sensor Overcurrent (8 volt supply) C0696 - Position Sensor Overcurrent (5 volt supply) C0710 - Steering Position Signal Malfunction C0750 - Tire Pressure Monitor (TPM) system sensor not transmitting C0755 - Tire Pressure Monitor (TPM) system sensor not transmitting C0760 - Tire Pressure Monitor (TPM) system sensor not transmitting C0765 - Tire Pressure Monitor (TPM) system sensor not transmitting C0800 - Device Power #1 Circuit Malfunction C0896 - Electronic Suspension Control (ESC) voltage is outside the normal range of 9 to 15.5 volts C1211 - ABS Indicator Lamp Circuit Malfunction C1214 - System Relay Contact or Coil Circuit Open C1217 - Pump Motor Shorted to Ground C1218 - Pump Motor Circuit Shorted to Voltage or Motor Ground Open C1221 - Left Front Wheel Speed Sensor Input Signal is 0 C1222 - Right Front Wheel Speed Sensor Input Signal is 0 C1223 - Left Rear Wheel Speed Sensor Input Signal is 0 C1224 - Right Rear Wheel Speed Sensor Input Signal is 0 C1225 - Left Front Excessive Wheel Speed Variation C1226 - Right Front Excessive Wheel Speed Variation C1227 - Left Rear Excessive Wheel Speed Variation C1228 - Right Rear Excessive Wheel Speed Variation C1232 - Left Front Wheel Speed Circuit Open or Shorted C1233 - Right Front Wheel Speed Circuit Open or Shorted C1234 - Left Rear Wheel Speed Circuit Open or Shorted C1235 - Right Rear Wheel Speed Circuit Open or Shorted C1236 - Low System Supply Voltage C1237 - High System Supply Voltage C1238 - Brake Thermal Model Exceeded C1241 - Variable Effort Steering Circuit Malfunction C1242 - Pump Motor Circuit Open C1243 - BPMV Pump Motor Stalled C1244 - Powertrain Indicated Engine Drag Control Malfunction C1246 - Brake Lining Wear Circuit Open C1248 - EBCM Turned the Red Brake Warning Indicator On C1251 - RSS Indicated Malfunction C1252 - Left Front Normal Force Malfunction C1253 - Right Front Normal Force Malfunction C1254 - Abnormal Shutdown Detected C1255 - EBCM Internal Malfunction C1256 - EBCM Internal Malfunction C1261 - Left Front Inlet Valve Solenoid Malfunction C1262 - Left Front Outlet Valve Solenoid Malfunction C1263 - Right Front Inlet Valve Solenoid Malfunction C1264 - Right Front Outlet Valve Solenoid Malfunction C1265 - Left Rear Inlet Valve Solenoid Malfunction C1266 - Left Rear Outlet Valve Solenoid Malfunction C1267 - Right Rear Inlet Valve Solenoid Malfunction C1268 - Right Rear Outlet Valve Solenoid Malfunction C1271 - Left Front TCS Master Cylinder Isolation Valve Malfunction C1272 - Left Front TCS Prime Valve Malfunction C1273 - Right Front TCS Master Cylinder Isolation Valve Malfunction C1274 - Right Front TCS Prime Valve Malfunction C1276 - Delivered Torque Signal Circuit Malfunction C1277 - Requested Torque Signal Circuit Malfunction C1278 - TCS Temporarily Inhibited By PCM C1281 - VSES Sensors Uncorrelated C1282 - Yaw Rate Sensor Bias Circuit Malfunction C1283 - Excessive Time to Center Steering C1284 - Lateral Accelerometer Sensor Bias Malfunction C1285 - Lateral Accelerometer Sensor Circuit Malfunction C1286 - Steering Sensor Bias Malfunction C1287 - Steering Sensor Rate Malfunction C1288 - Steering Sensor Circuit Malfunction C1291 - Open Brake Lamp Switch Contacts During Deceleration C1292 - Brake Fluid Pressure Sensor Circuit C1293 - Code C1291 Set in Previous Ignition Cycle C1294 - Brake Lamp Switch Circuit Always Active C1295 - Brake Lamp Switch Circuit Open C1296 - Brake Fluid Pressure Sensor Circuit C1297 - PCM Indicated Brake Extended Travel Switch Failure C1298 - PCM Class 2 Serial Data Link Malfunction C1326 - Battery Out of Range C1650 - RSS Control Module Fault C1658 - RSS Control Module Calibration Fault C1710 - Left Front Damper Actuator Short Circuit to Battery C1711 - Left Front Damper Actuator Short Circuit to Ground C1712 - Left Front Damper Actuator Open Circuit C1715 - Right Front Damper Actuator Short Circuit to Battery C1716 - Right Front Damper Actuator Short Circuit to Ground C1717 - Right Front Damper Actuator Open Circuit C1720 - Left Rear Damper Actuator Short Circuit to Battery C1721 - Left Rear Damper Actuator Short Circuit to Ground C1722 - Left Rear Damper Actuator Open Circuit C1725 - Right Rear Damper Actuator Short Circuit to Battery C1726 - Right Rear Damper Actuator Short Circuit to Ground C1727 - Right Rear Damper Actuator Open Circuit C1735 - Compressor Relay Short to Battery C1736 - Compressor Relay Short to GND/Open Circuit C1737 - Exhaust Solenoid Valve Short to Battery C1738 - Exhaust Solenoid Valve Short to GND C1743 - Speed Signal Fault C1744 - Lift/Dive Signal Discrete Fault C1760 - Left Front Position Sensor Input Fault C1761 - Right Front Position Sensor Input Fault C1762 - Left Rear Position Sensor Input Fault C1763 - Right Rear Position Sensor Input Fault C1768 - Position Sensor Supply Fault C1780 - Loss of Steering Position Signal C1782 - ICCS2 DL Left Output Short Circuit to Bat C1783 - ICCS2 DL Left Output Short Circuit to GND C1784 - ICCS2 DL Right Output Short Circuit to Bat C1785 - ICCS2 DL Right Output Short Circuit to GND C1786 - Damper Control Relay Fault C1787 - Damper Control Relay Short to GND C1788 - Damper Control Relay Short to Bat
P2008 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit P2009 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit Low Voltage P2010 - Intake Manifold Runner Control (IMRC) Solenoid Control Circuit High Voltage P2066 - Fuel Level Sensor 2 Performance P2067 - Fuel Level Sensor 2 Circuit Low Voltage P2068 - Fuel Level Sensor 2 Circuit High Voltage P2096 - Post Catalyst Fuel Trim System Low Limit P2097 - Post Catalyst Fuel Trim System High Limit P2098 - Post Catalyst Fuel Trim System Low Limit P2099 - Post Catalyst Fuel Trim System High Limit P2100 - Throttle Actuator Control (TAC) Motor Control Circuit P2101 - Control Module Throttle Actuator Position Performance P2105 - Throttle Actuator Control (TAC) System - Forced Engine Shutdown P2107 - Throttle Actuator Control (TAC) Module Internal Circuit P2108 - Throttle Actuator Control (TAC) Module Performance P2119 - Throttle Closed Position Performance P2120 - Accelerator Pedal Position (APP) Sensor 1 Circuit P2121 - Accelerator Pedal Position (APP) Sensor 1 Performance P2122 - Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage P2123 - Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage P2125 - Accelerator Pedal Position (APP) Sensor 2 Circuit P2127 - Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage P2128 - Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage P2135 - Throttle Position (TP) Sensor 1-2 Correlation P2138 - Accelerator Pedal Position (APP) Sensor 1-2 Correlation P2176 - Minimum Throttle Position Not Learned P2500 - Generator L-Terminal Circuit Low Voltage P2501 - Generator L-Terminal Circuit High Voltage P2535 - Ignition 1 Switch Circuit High Voltage (PCM) P2610 - ECU Malfunction P2763 - Short to voltage in the TCC Solenoid P2764 - Open or Short to ground in the TCC PWM solenoid valve circuit P2A00 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 1 (PCM) P2A01 - HO2S Circuit Closed Loop (CL) Performance Bank 1 Sensor 2 (PCM) P3000 - Hacking AWH Data
NETWORK CODES:
U0001 - Controller Area Network (CAN) Bus Communication (ECM) U1000 - Class 2 Communication Malfunction U1001~U1254 - Loss of XXX Communications U1002~U1015 - Loss of serial communications for class 2 devices U1016 - Loss of Class 2 Communication with VCM U1016 - Loss of Communications with PCM U1017~U1025 - Loss of serial communications for class 2 devices U1026 - Loss of ATC Class 2 Communication U1027~U1039 - Loss of Serial Communications for Class 2 Devices U1040 - Loss of Class 2 Communications with ABS U1041 - Loss of EBCM Communication U1042 - Lost Communications with Brake/Traction Control System U1043~U1055 - Loss of Serial Communications for Class 2 Devices U1056 - Loss of Communications with RSS U1057~U1060 - Loss of Serial Communications for Class 2 Devices U1161 - Loss of PDM Serial Data U1062 - Loss of Serial Communications for Class 2 Devices U1163 - Loss of RRDM Serial Data U1064 - Loss of Communications with DIM U1065 - Loss of Communications with IPM U1066 - Loss of Communications with RIM U1067~U1069 - Loss of Serial Communications for Class 2 Devices U1170 - Loss of Driver Door Switch Asm Serial Data U1071~U1087 - Loss of Serial Communications for Class 2 Devices U1088 - Loss of Communications with SDM U1089~U1095 - Loss of Serial Communications for Class 2 Devices U1096 - Loss of Communications with IPC U1097~U1127 - Loss of serial communications for class 2 devices U1128 - Loss of Communications with IRC U1129 - Loss of Communications with AMP U1130~U1143 - Loss of serial communications for class 2 devices U1144 - Loss of Communications with PHN U1145 - Loss Of NAV Communications U1146 - Loss Of Onstar Communiction U1147~U1151 - Loss of serial communications for class 2 devices U1152 - Loss Of ACM Serial Data Communication U1152 - Loss of Data HCM U1153 - Loss of Communications with CCP U1154~U1159 - Loss of serial communications for class 2 devices U1160 - Loss of Communications with DDM U1161 - Loss of PASS Door Module SBI U1162 - Loss of Rear Driver Door Module SBI U1163 - Loss of Rear PASS Door Module SBI U1164 - Loss Of DIM Serial Data Communication U1165 - Loss of serial communications for class 2 devices U1166 - Loss of Communications with SCM U1167 - Loss of serial communications for class 2 devices U1168 - Loss Of TTM Communications U1169 - Loss of Communications with MMM U1170 - Loss of Driver Door Switch SBI U1171~U1175 - Loss of serial communications for class 2 devices U1176 - Loss Of RFA Communications U1177~U1191 - Loss of serial communications for class 2 devices U1192 - Loss of VTD Class 2 Serial Data Com U1193 - Loss of VIM Class 2 Communication U1194~U1254 - Loss of serial communications for class 2 devices U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction) U1300 - Class 2 Short to Ground U1301 - Class 2 Short to Battery U1304 - Loss Of UART Communications U1305 - Class 2 Data Link Low or High U1500 - Inter-Device Dedicated Bus Malfunction U1713 - Loss of Front Door Module to Window Motor High Speed Comm. U1715 - Loss of Front Door Module to Window Motor High Speed Comm. U1714 - Loss of Front Door Module to Window Motor Normal Speed Comm. U1716 - Loss of Front Door Module to Window Motor Normal Speed Comm. U1800 - Controller Area Network (CAN) Bus Communication U2000 - Invalid BFC Transmitted SPI Data U2001 - Invalid IPC Transmitted SPI Data U2002 - SPI Data-In Low U2003 - SPI Data-In High U2004 - SPI Data-Out Low U2005 - SPI Data-Out High U2006 - SPI Clock-Out Low U2007 - SPI Clock-Out High U2050 - SIR PPS/CPS Communications Link malfunction U2100 - Controller Area Network (CAN) Bus OFF U2100 - CAN-BUS Communication Malfunction U2102 - More Controllers on Bus than Programmed U2103 - Fewer Controllers On Bus Than Programmed U2104 - CAN Bus Reset Counter Overrun U2105 - CAN Bus Error ECM U2105 - Lost Comm with Engine Control System U2106 - Lost Comm with Trans Control System U2107 - Lost Communications with Body Control System U2108 - CAN Bus Error ABS U2108 - Lost Comm with ABS Control System U2150 - Navigation ECU Gateway Communication Error U2151 - Navigation ECU Communication Malfunction U2153 - VICS ECU Communication Error
Sold in the United States between ??? and January 1, 1996 were required to be OBD I equipped.
OPERATING ON-BOARD DIAGNOSTIC SYSTEM
To enter diagnostic mode: Turn ignition "ON." Depress the "OFF" and "WARMER" buttons on the Climate Control Center (CCC) simultaneously and hold until the segment check appears on the Instrument Panel Cluster (IPC).
TROUBLE CODE DISPLAY
After entering On-Board Diagnostics, a segment check is automatically performed and then any trouble code stored in computer memory will be displayed. Codes may be stored for the Powertrain Control Module (PCM), Instrument Panel Cluster (IPC), Air Conditioning Programer (ACP), Supplemental Inflatable Restraint (SIR) Traction Control System (TCS) or Road Sensing Suspension (RSS) systems.
Each trouble code consists of the system abbreviation: (E: Engine), (P: PCM), (I: IPC), (A: ACP), (R: SIR), (T: TCS), (S: RSS), a three digit code identifier, and the letter C or H. All codes for each system are displayed together, in the order of their three digit number (lowest first). The final digit of the code, a "C" or "H" is used to indicate whether the code is Current or History. A "C" means the fault was still present the last time the diagnostic test was run, while "H" means the failure was not present the last time the code was tested for.
If no codes are present for a system, a "NO X CODE" message (with "X" being the system i.e. E, I, A, R, T or S) will be displayed. If the communication line to a component is not operating, a "NO X DATA" message will be displayed, indicating that the IPC could not communicate with that system.
SELECTING THE SYSTEM
After trouble codes have been displayed, a specific vehicle system PCM, IPC, ACP, SIR, TCS, RSS may be selected for testing. The first available system will be automatically displayed (i.e. PCM?). While selecting the system to test, any of the following actions may be taken:
Depressing the "HI" button on the CCC will select the displayed system for testing. Depressing the "LO" button on the CCC will display the next available system selection. This allows the display to be stepped through all system choices. This list of systems can be repeated following the end of the system list. Depressing the "OFF" button the CCC will stop the system selection process and return the display to the beginning of the trouble code sequence.
SELECTING THE TEST TYPE
Having selected a system, the first available test type will be displayed (i.e. PCM DATA?, PCM CLEAR CODES?). While selecting a specific test type, any of the following actions may be taken:
Depressing the "HI" button on the CCC will select the displayed test type. At this point the first of several specific tests will appear. Depressing the "LO" button on the CCC will display the next available test type for the selected system. This allows the display to be stepped through all available test type choices. This list of test types can be repeated following the display of the last test type. Depressing the "OFF" button on the CCC will stop the test type selection process and return the display to the next available system selection.
CLEAR CODES
Selection of "CLEAR CODES?" test will result in the message "CODES CLEARED" being displayed along with the selected systems name. This message will appear for 3 seconds and then return to the next available test type.
EXITING DIAGNOSTIC MODE
To get out of the diagnostic mode anytime during the test, depress the "AUTO" or "DEFOG" button, or turn the ignition switch "OFF." Trouble codes are not erased if this is done prior to selecting "CODES CLEARED."
Customer Snapshot
DESCRIPTION The Northstar powertrain has an unique feature that allows a Powertrain Control Module (PCM) snapshot to be recorded without being in on-board diagnostics by simply pressing two buttons on the Climate Control Center (CCC). This feature, called Customer Snapshot, records a complete set of PCM data parameters and inputs when the "OFF" and "FRONT DEFROST" buttons on the CCC are pressed simultaneously.
Customer Snapshot only works when the vehicle is NOT in on-board diagnostics. This feature can be very useful when it is difficult to reproduce a condition. When this occurs, the owner or driver may be instructed to take a Customer Snapshot while the condition is present and return to the dealer for diagnosis when convenient.
ACTIVATING SNAPSHOT A Customer Snapshot may be taken anytime the ignition is on and the vehicle is not in on-board diagnostics. While this is true, pressing the "OFF" and "FRONT DEFROST" buttons simultaneously for one second will cause a snapshot to be taken and the "Service Engine Soon" Malfunction Indicator Lamp (MIL) to be turned "ON" for 2 seconds as confirmation that a snapshot was taken.
RETRIEVING SNAPSHOT DATA This data may be retrieved by entering diagnostics, selecting PCM SNAPSHOT and viewing the P001 SNAPSHOT (It will appear as a code snapshot with a code designation of P001, hence the P001 SNAPSHOT designation.). The Customer Snapshot data will be overwritten if another Customer Snapshot is taken or if a PCM snapshot is taken while in on-board diagnostics.
GM Diagnostic Trouble Code List
Body Control Module (BCM) Codes Code Description B110 ....................................... Outside Air Temperature Circuit Problem B111 ..................................... A/C High Side Temperature Circuit Problem B112 ......................... A/C Low Side Temperature Circuit Problem [A/C Clutch] B113 ............................................ In-Car Temperature Circuit Problem B115 ........................................... Sunload Temperature Circuit Problem B119 ................................. Twilight Sentinel Photosensor Circuit Problem B120 ................................... Twilight Sentinel Delay Pot Circuit Problem B122 ........................................ Panel Lamp Dimming Pot Circuit Problem B124 .................................................. Speed Sensor Circuit Problem B127 .......................... PRNDL321 Sensor Circuit Problem [Park Brake Release] B132 ................................................... Oil Pressure Sensor Failure B332 .......................................... ABS/TCS Serial Communication Failure B333 ................................ Loss of Supplemental Inflatable Restraint Data B334 .................................. Loss of Electronic Control Module (ECM) Data B335 ................ Loss of Climate Control Driver Information Center (CCDIC) Data B336 .................................... Loss of Instrument Panel Cluster (IPC)Data B337 ................... Loss of Programmer Data [A/C Clutch, Parking Brake Release] B339 ..................................... Ride Control Serial Communication Failure B409 ....................................................... Charging System Failure B410 ....................................................... Charging System Problem B411 ......................................................... Battery Volts Too Low B412 ........................................................ Battery Volts Too High B420 ................................................... BCM Output Driver 1 Failure B421 ................................................... BCM Output Driver 2 Failure B440 .......................................................... Air Mix Door Problem B441 .......................................................... Cooling Fans Problem B446 ......................................... Low A/C Refrigerant Condition Warning B447 ....................... Very Low A/C Refrigerant Condition Warning [A/C Clutch] B448 ...................... Very Low A/C Refrigerant Pressure Condition [A/C Clutch] B449 ............................................ A/C High Side Temperature Too High B450 ..................................... Coolant Temperature Too High [A/C Clutch] B480 ......................... Loss of ABS/TCS Communication [Antilock Brake System] B481 ............................................. Antilock Brake System (ABS) Fault B483 ...................................... ABS/TCS Disabled [Antilock Brake System] B552 .................................................... BCM Memory Reset Indicator B556 .............................................................. BCM EEPROM Error L110 ........................................... LSP Communication Failure (Allante) L411 ................................. Lighting System Low Voltage Warning (Allante) Instrument Panel Cluster (IPC) Codes Code Description I022 .............................................. Panel Dimming Switch Pot Circuit I027 ........................................................ PRND321 switch failure I032 .......................................................... Loss of ABS/TCS Data I033 ................................ Loss of Supplemental Inflatable Restraint Data I034 ........................................ Loss of Powertrain Control Module Data I037 ...................................... Loss of Air Conditioning Programmer Data I039 .......................................... Loss of Road Sensing Suspension Data I041 ....................................................... Battery Voltage Too Low I042 ...................................................... Battery Voltage Too High I052 ....................................................... Keep Alive Memory Error I056 ......................................... Instrument Panel Cluster EEPROM Error
Supplemental Inflatable Restraint (SIR) Codes Code Description R014 .......................................... Dual Pole Arming Sensor Disconnected R015 ................................... Passenger Initiator Circuit Resistance High R016 .................................... Passenger Initiator Circuit Resistance Low R017 .............................................. Passenger Initiator Circuit Open R018 ....................................... Discriminating Sensor Interconnect Open R019 ...................................... Passenger Initiator Circuit Voltage High R021 ...................................... Driver Initiator Circuit Resistance High R022 ....................................... Driver Initiator Circuit Resistance Low R023 ......................................... Driver Initiator Circuit Voltage High R024 ................................................. Initiator Circuit Voltage Low R025 ........................................... Initiator Circuit Short to Ignition R026 ................................................. Driver Initiator Circuit Open R028 ................................................ Current Sink Or Source Failure R031 .......................................... Driver Loop Energy Reserve Feed Open RO32 ............................................. Grounded 36VLR to Deployment Loop RO33 ....................................... Steering Diode Shorted in Arming Sensor R034 .................................... Dual Pole Arming Sensor Ignition Feed Open R035 ......................................... Discriminating Sensor Open or Missing R036 ....................................... Passenger Loop Energy Reserve Feed Open RO41 ....................................... Energy Reserve Voltage Charging Failure R042 ............................................... Loop Energy Reserve Voltage Low R043 ........................................................ Driver Source Feed Low R044 ..................................................... Passenger Source Feed Low R051 ........................................................ Frontal Crash Detected R052 ................................................................ Data Area Full R053 ............................................... Driver Side Low High Resistance R054 ............................................ Passenger Side Low High Resistance R055 .......................................................... DERM Incompatibility R061 ................................................. SIR Indicator Circuit Failure R062 ....................................... Redundant SIR Indicator Circuit Failure R071 ............................... Internal Diagnostic Energy Reserve Module Fault R075 ........................................................... Internal DERM Fault R081 .................................................... Driver Ignition Diode Open R082 ................................................. Passenger Ignition Diode Open R083 .................................................. Driver Reserve Diode Shorted R084 ............................................... Passenger Reserve Diode Shorted
Air Conditioning Programer (ACP) Codes Code Description A010 ............................................ Outside Temperature Sensor Circuit A011 .......................................... High Side Temperature Sensor Circuit A012 ........................................... Low Side Temperature Sensor Circuit A013 ............................................. In-Car Temperature Sensor Circuit A015 ....................................................... Sun Load Sensor Circuit A037 ......................................... Loss of Instrument Panel Cluster Data A040 .......................................... Air Mix Valve (Door) Circuit Problem A046 ........................................................ Low Refrigerant Charge A047 ........................................................ Low Refrigerant Charge A048 ...................................................... Low Refrigerant Pressure A049 ........................................... HVAC - Coolant Temperature Too High A050 ........................................... HVAC - Coolant Temperature Too High A052 ....................................................... Keep alive memory error
Road Sensing Suspension (RSS) Codes Code Description S010 .................................. Left Front Damper Solenoid Valve Short to B+ S011 ......................... Left Front Damper Solenoid Valve Short to Ground/Open S015 ................................. Right Front Damper Solenoid Valve Short to B+ S016 ........................ Right Front Damper Solenoid Valve Short to Ground/Open S020 ................................... Left Rear Damper Solenoid Valve Short to B+ S021 .......................... Left Rear Damper Solenoid Valve Short to Ground/Open S025 .................................. Right Rear Damper Solenoid Valve Short to B+ S026 ......................... Right Rear Damper Solenoid Valve Short to Ground/Open S027 .............................................. Right Rear Solenoid open circuit S030 ................................................ Speed Sensitive Steering Fault S035 ............................... Electronic Level Control Compressor Short to B+ S036 ...................... Electronic Level Control Compressor Short to Ground/Open S037 ............................ Electronic Level Control Exhaust Valve Short to B+ S038 ................... Electronic Level Control Exhaust Valve Short to Ground/Open S043 ............................................................ Speed Signal Fault S044 ..................................................... Lift or Dive Signal Fault S050 .......................................... Road Sensing Suspension Module Fault S055 .......................................... Resistor Module Short to Ground/Open S060 .............................................. Left Front Position Sensor Fault S061 ............................................. Right Front Position Sensor Fault S062 ............................................... Left Rear Position Sensor Fault S063 .............................................. Right Rear Position Sensor Fault S064 ........................................ Left Front Position Sensor Overcurrent S065 ....................................... Right Front Position Sensor Overcurrent S066 ......................................... Left Rear Position Sensor Overcurrent S067 ........................................ Right Rear Position Sensor Overcurrent S070 ................................................ Left Front Accelerometer Fault S071 ............................................... Right Front Accelerometer Fault S072 ................................................. Left Rear Accelerometer Fault S073 ................................................ Right Rear Accelerometer Fault S074 .......................................... Left Front Accelerometer Overcurrent S075 ......................................... Right Front Accelerometer Overcurrent S076 ........................................... Left Rear Accelerometer Overcurrent S077 .......................................... Right Rear Accelerometer Overcurrent
Powertrain Control Module (PCM) Codes (Engine/Transmission) Engine Control Module (ECM) Codes* Code Description P000 (E000) ............................................. Cruise Servo Apply Problem P012 (E012) .................................................. No Distributor Signal P013 (E013) .......................................... Right Oxygen Sensor Not Ready P014 (E014) ............................................ Shorted Coolant Temp Sensor P015 (E015) ........................................ Open Coolant Temp Sensor Signal P016 (E016) ......................................... Voltage Out of Range [ALL SOL] P017 (E017) ........................................... Left Oxygen Sensor not ready P019 (E019) .............................................. Shorted Fuel Pump Circuit P020 (E020) ................................................. Open Fuel Pump Circuit P021 (E021) ............................................... Shorted TPS Signal [VCC] P022 (E022) .................................................. Open TPS Signal [VCC] P023 (E023) ..................... Electronic Spark Timing (EST) Signal problem [EGR] P024 (E024) ..................................... Vehicle Speed Sensor signal to TCC P025 (E025) .................. (Ignition Control Module) 24x Reference Low Indicator P026 (E026) ......................................... Shorted Throttle Signal Switch P027 (E027) ............................................ Open throttle signal switch P028 (E028) ......... Open 3rd or 4th Gear Shift Or Shorted 2-3 Shift Solenoid [VCC] P029 (E029) .............. Transaxle Shift 'B' solenoid problem (1st, 3rd, 4th gear) P030 (E030) ................................................... ISC RPM out of range P031 (E031) ..................................................... Shorted MAP Sensor P032 (E032) ................................................. Open MAP Sensor Signal P033 (E033) ............................................ Wheel speed sensors problem P034 (E034) ......................................... MAP Sensor Signal Out of Range P035 (E035) .......................... PCM reference low signal voltage Out of Range P036 (E036) ................................. EGR Valve Pintle Position Out of Range P037 (E037) .............................................. Shorted MAT Sensor Signal P038 (E038) ................................................. Open MAT Sensor Signal P039 (E039) ..... Torque Coverter Clutch/Viscous Converter Clutch Engagement Problem P040 (E040) .................................... Power steering Pressure switch open P041 (E041) ................... No Cam Reference Signal from Ignition Control Module P042 (E042) ......................................... Left Oxygen Sensor Signal Lean P043 (E043) ......................................... Left Oxygen Sensor Signal Rich P044 (E044) ........................................ Right Oxygen Sensor Signal Lean P045 (E045) ........................................ Right Oxygen Sensor Signal Rich P046 (E046) .................................. Right to Left Bank Fueling Difference P047 (E047) ................................................. IPC - PCM Data Problem P048 (E048) ......................... Exhaust Gas Recirculation (EGR) system Problem P049 (E049) .............................. Air Injection Reaction (AIR) System Fault P050 (E050) ........................................... Second Gear Circuit Pressure P051 (E051) .......................................................... MEM-CAL Error P052 (E052) ....................................................... PCM Memory Reset P053 (E053) ........................................... Distributor Signal Interrupt P055 (E055) ............................... Closed Throttle Angle Out of Range [TPS] P056 (E056) ........................................ Transmission Input Speed Sensor P057 (E057) .......... Shorted 4th Gear Switch Circuit Or Shorted 3-4 Shift Solenoid P058 (E058) ................................................ PASSKey Control Problem P059 (E059) ........................................ Transmission Input speed sensor P060 (E060) .......................................... Cruise-Transaxle Not in Drive P061 (E061) ......................................... Cruise - Vent Solenoid Problem P062 (E062) ....................................... Cruise - Vacuum Solenoid Problem P063 (E063) ....................................... Set Vs. Vehicle Speed Difference P064 (E064) ................................. Cruise - Vehicle Acceleration Too High P065 (E065) ................................................... Cruise - SPS Failure P066 (E066) .............................................. Cruise - RPM Out of Range P067 (E067) ........................................ Cruise Switch shorted at Enable P068 (E068) ............................ Cruise Command Problem (servo out of range) P069 (E069) ........................ Traction Control Active During Cruise Operation P070 (E070) ................................................ Intermittent TPS Signal P071 (E071) ................................................ Intermittent MAP Signal P072 (E072) ..................... MAP sensor signal change without TPS signal change P073 (E073) ..................................... Intermittent Coolant Sensor Signal P074 (E074) ................................................ Intermittent MAT Signal P075 (E075) ................................................ Intermittent VSS Signal P076 (E076) ......................................... Transmission Pressuse Solenoid P080 (E080) ....................................................... Fuel System Rich P081 (E081) ................................ CAM to 4X reference correlation problem P083 (E083) .................................. Crankshaft to Ignition Module Failure P085 (E085) ........................................... Idle Throttle Angle Too High P086 (E086) ................... Undefined Gear Ratio (Transmission Pressure Control) P088 (E088) .... Torque converter clutch did not disengage when commanded OFF by PCM P089 (E089) ................. Long Shift and Maximum Adapt (Trans. Pressure Control) P090 (E090) ......... VCC/TCC Brake Switch/Park/neutral switch Input Circuit Problem P091 (E091) .................. PRNDL Switch Problem (transaxle range switch problem) P092 (E092) ...................................... Heated Windshield Request Problem P092 (E092) ............................... Traction Control System PWM Link Failure P093 (E093) ............... Traction control system signals were not received by PCM P094 (E094) ............ Transaxle Shift "A" Solenoid Problem (Vehicle Speed Sensor) P095 (E095) .................................................. Engine Stall Detected P096 (E096) ............................................ Torque Converter Overstress P097 (E097) .............................................. High RPM P/N to D/R Shift P098 (E098) .................................... High RPM P/N to D/R Shift Under ISC P099 (E099) ............................ Cruise Control Servo Applied, Not in Cruise P102 (E102) .............................. Shorted brake Booster Vacuum (BBV) Sensor P103 (E100) ....................................... Open Brake Booster Vacuum Sensor P105 (E105) ........................................... Brake Booster Vacuum Too Low P106 (E106) ........... Sudden vehicle deceleration w/o brake switch being activated P107 (E107) .............................................. PCM/BCM Data Link Problem P108 (E108) ............................................................. PROM error P109 (E109) ....... Keep Alive Memory (KAM) Reset/PCM has lost primary battery power P110 (E110) ................................... Generator L-terminal Circuit Problem P112 (E112) ................................................... PCM PROM EPROM error P117 (E117) .................... Open/Short Solenoids/Solenoid Wiring (Transmission) P119 (E119) .......................................... Open or Shorted Fuel Injector P120 (E120) ................................ A/C low side temperature sensor problem P121 (E121) ............................... A/C high side temperature sensor problem P122 (E122) .................. A/C coolant temperature sensor signal voltage problem P123 (E123) ................................... A/C refrigerant pressure was too low P124 (E124) ............ A/C compressor circuit was shorted (ON) w/o request by HVAC P125 (E125) ............. A/C high pressure switch/A/C high side temperature problem P126 (E126) ....................... A/C high pressure switch disabled A/C compressor P128 (E128) .................. A/C was disabled because of high refrigerant pressure P131 (E131) .................................. No signal from the knock sensor (PCM) P132 (E132) ......................................... Knock Sensor Circuitry Failure P133 (E133) ........................................ Loss of ABS communications/data P134 (E134) ............................ Loss of IPC (instrument panel cluster) data P135 (E135) ...................................................... Loss of HVAC data P136 (E136) ................... Loss of DERM (diagnostic energy reserve module) data P137 (E137) ............................. Loss of TCS (traction control system) Data
(*) for the model years prior to 1993, the "P###" (Powertrain) is replaced by an "E####" (Engine), but the description remains unchanged.
PCM Data Displays DESCRIPTION
The Powertrain Control Module (PCM) Data selection allows viewing of inputs the PCM uses to control powertrain functions. Each data parameter is displayed on the Driver Information Center (DIC) in appropriate units. The values displayed are non-fail safe.
PD01 (ED01) TPS (Throttle Position Sensor) in degrees PD02 (ED02) Manifold Absolute Pressure Sensor in Kilo Pascals (kPa) PD03 (ED03) Barometric Pressure in kPa PD04 (ED04) Engine Coolant Temperature (ECT) sensor in degrees Celsius PD05 (ED05) Intake Air Temperature (IAT) sensor in degrees Celsius PD07 (ED07) EGR Pintle Position PD08 (ED08) Spark Advance in degrees Before Top Dead Center (BTDC) PD09 (ED09) Ignition Ground Voltage PD10 (ED10) Fuel Pump Feedback Voltage (battery voltage) PD11 (ED11) Engine Speed in revolutions per minute (rpm) PD12 (ED12) Vehicle Speed in miles per hour (mph) PD13 (ED13) Pintle Position PD15 (ED15) Ignition 1 Voltage PD16 (ED16) PCM Output Fault Status A PD17 (ED17) PCM Output Fault Status B PD19 (ED19) Power Steering Sensor (kPa) PD30 (ED30) Front Bank Injector Pulse Width in milliseconds (ms) PD31 (ED31) Rear Bank Injector Pulse Width in milliseconds (ms) PD32 (ED32) Front Oxygen Sensor Voltage PD33 (ED33) Rear Oxygen Sensor Voltage PD34 (ED34) Front Oxygen Sensor Cross Counts (per second) PD35 (ED35) Rear Oxygen Sensor Cross Counts (per second) PD36 (ED36) Front Short Term Fuel Trim PD37 (ED37) Rear Short Term Fuel Trim PD38 (ED38) Front Long Term Fuel Trim PD39 (ED39) Rear Long Term Fuel Trim PD40 (ED40) Knock Sensor Spark Retard in degrees PD41 (ED41) Knock Sensor PD42 (ED42) Octane Level of Fuel will display 0, 87, 90, or 93 PD69 (ED69) Cruise Lash PD70 (ED70) Cruise Control Feedback (percent) PD71 (ED71) Transaxle Pressure Switch (PRNDL Code) PD72 (ED72) Transaxle Input Speed in rpm (PRNDL P/N Sw) PD73 (ED73) Torque Converter Slip Speed in rpm PD74 (ED74) TPC Solenoid Current PD75 (ED75) Current ER PD76 (ED76) Transaxle Gear Ratio PD77 (ED77) Transaxle Oil Temperature in degrees Celsius PD78 (ED78) Transaxle Shift Adapt in pounds per square inch (psi) PD80 (ED80) Transaxle Garage Shift Adapt in seconds PD81 (ED81) Torque Converter Clutch (TCC) Solenoid Duty Cycle in percent PD82 (ED82) Transaxle Shift Time in seconds PD83 (ED83) Non-drive Wheel Speed in kph PD84 (ED84) Brake Booster Vacuum in kPa PD97 (ED97) PROM Calibration-Transaxle PD98 (ED98) Ignition Cycles (key cycles on/off) PD99 (ED99) PROM Calibration-Engine
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