Diagnostic System Check
NOTE:
When using scan tool for diagnostics, ABS/TCS system is disabled by EBCM. ANTI-LOCK indicator will illuminate indicating only normal power assist braking is available. After diagnostics have been completed, disconnect scan tool from Data Link Connector (DLC) and turn ignition off for a least 10 seconds before road testing. This procedure is done to reset EBCM.
- Install scan tool. If scan tool powers up, go to next step. If scan tool does not power up, diagnose data link communications. See DATA LINK CONNECTORS article in WIRING DIAGRAMS.
- Turn ignition on, with engine off. Using scan tool, attempt to establish communication with BCM, EBCM, IPC and PCM. If scan tool communicates with all control modules, go to next step. If scan tool does not communicate with all control modules, see appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT.
- Select DTCs function on scan tool for BCM, EBCM, IPC or PCM. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, go to SYMPTOM DIAGNOSIS .
- If scan tool displays any DTCs which begins with a "U", see appropriate MODULE COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT. If scan tool does not display any DTCs which begins with a "U", go to next step.
- If scan tool displays DTC B1000, B1007 or B1440, diagnose affected DTCs. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If DTC B1000, B1007 or B1440 is not displayed, go to next step.
- If scan tool displays DTC B1327, B1328, B1507 or B1508, diagnose affected DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If DTC B1327, B1328, B1507 or B1508 is not displayed, diagnose affected DTC(s) displayed.
If multiple DTCs are displayed, begin diagnosis with DTC that is displayed first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table. Diagnose all codes in the order displayed by scan tool.
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC | (1) Definition | ||||
|---|---|---|---|---|---|
| B2747 | Traction Control Switch Circuit Shorted To Ground | ||||
| C0035 | Wheel Speed Sensor Circuit Failure | ||||
| C0036 | Wheel Speed Sensor Circuit Failure | ||||
| C0040 | Wheel Speed Sensor Circuit Failure | ||||
| C0041 | Wheel Speed Sensor Circuit Failure | ||||
| C0045 | Wheel Speed Sensor Circuit Failure | ||||
| C0046 | Wheel Speed Sensor Circuit Failure | ||||
| C0050 | Wheel Speed Sensor Circuit Failure | ||||
| C0051 | Wheel Speed Sensor Circuit Failure | ||||
| C0060 - C0095 | Inlet & Outlet Solenoid Valve Circuit Failure | ||||
| C0110 | Pump Motor Circuit Failure | ||||
| C0121 | Solenoid Valve Relay Circuit Failure | ||||
| C0141 - C0156 | Isolation & Prime Solenoid Valve Circuit Failure | ||||
| C0161 | Stoplamp Switch Circuit Failure | ||||
| C0235 | Engine Speed Signal Circuit Failure | ||||
| C0237 | Engine Speed Signal Circuit Failure | ||||
| C0240 | TCS Malfunction | ||||
| C0241 | PWM Requested Torque Signal Malfunction | ||||
| C0244 | PWM Delivered Torque Signal Malfunction | ||||
| C0245 | Wheel Speed Deviation | ||||
| C0550 | EBCM Malfunction | ||||
| C0565 | Incorrect VIN Information | ||||
| C0896 | EBCM Voltage Out Of Range | ||||
| P1504 | Engine Speed Signal Circuit Failure | ||||
| P1571 | PWM Requested Torque Signal Malfunction | ||||
| P1689 | PWM Delivered Torque Signal Malfunction | ||||
| U1000 & U1255 | (2) | ||||
| U1300 | (2) | ||||
| U1301 | (2) | ||||
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