Diagnostic System Check
NOTE:
When using scan tool for diagnostics, ABS/ETS 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, go to TEST G: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYMPTOM TESTS.
- 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", go to TEST G: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE . If scan tool does not display any DTCs which begins with a "U", go to next step.
- If scan tool displays DTC B1000 or B1013, diagnose affected DTCs. See appropriate BODY CONTROL MODULE article in ACCESSORIES & EQUIPMENT. If DTC B1000 or B1013 is not displayed, go to next step.
- If scan tool displays DTC P0560 or P0620, diagnose affected DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If DTC P0560 or P0620 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 | ||
|---|---|---|---|
| C1214 | Solenoid Valve Relay Contact Or Coil Circuit Open | ||
| C1217 | Pump Motor Shorted To Ground | ||
| C1218 | Pump Motor Shorted To Voltage | ||
| C1221 | Wheel Speed Sensor Input Signal Is Zero | ||
| C1222 | Wheel Speed Sensor Input Signal Is Zero | ||
| C1223 | Wheel Speed Sensor Input Signal Is Zero | ||
| C1224 | Wheel Speed Sensor Input Signal Is Zero | ||
| C1225 | Rapid Variation In Wheel Speed Sensor | ||
| C1226 | Rapid Variation In Wheel Speed Sensor | ||
| C1227 | Rapid Variation In Wheel Speed Sensor | ||
| C1228 | Rapid Variation In Wheel Speed Sensor | ||
| C1232 | Wheel Speed Sensor Short To Voltage Or Ground, Or Open | ||
| C1233 | Wheel Speed Sensor Short To Voltage Or Ground, Or Open | ||
| C1234 | Wheel Speed Sensor Short To Voltage Or Ground, Or Open | ||
| C1235 | Wheel Speed Sensor Short To Voltage Or Ground, Or Open | ||
| C1236 | Low System Supply Voltage | ||
| C1237 | High System Supply Voltage | ||
| C1238 | Brake Rotor Temperatures Have Exceeded Thermal Cutoff Point ("W" Body) | ||
| C1242 | BPMV Pump Motor Circuit Open | ||
| C1243 | BPMV Pump Motor Circuit Open | ||
| C1248 | DRP Circuit Malfunction ("W" Body) | ||
| C1254 | Abnormal Shutdown Detected | ||
| C1255 | EBCM Internal Malfunction | ||
| C1256 | EBCM Internal Malfunction | ||
| C1261 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1262 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1263 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1264 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1265 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1266 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1267 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1268 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1261 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1262 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1263 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1264 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1265 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1266 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1267 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1268 | Commanded State Of Driver And Acutal State Of control Circuit Does Not Match (Except "W" Body) | ||
| C1271 | Commanded State Of Driver And Actual State Of Control Circuit Does Not Match ("W" Body) | ||
| C1272 | Commanded State Of Driver And Actual State Of Control Circuit Does Not Match ("W" Body) | ||
| C1273 | Commanded State Of Driver And Actual State Of Control Circuit Does Not Match ("W" Body) | ||
| C1274 | Commanded State Of Driver And Actual State Of Control Circuit Does Not Match ("W" Body) | ||
| C1275 | PCM Requested ETS Disabled | ||
| C1276 | EBCM Or PCM Detects Delivered Torque Signal Is Out Of Valid Range ("W" Body) | ||
| C1277 | Requested Torque Signal Malfunction ("W" Body) | ||
| C1278 | TCS Temporarily Inhibited By PCM | ||
| C1295 | Brakelight Switch Circuit Open | ||
| P1571 | Requested Torque Signal Malfunction ("W" Body) | ||
| P1644 | EBCM Or PCM Detects Delivered Torque Signal Is Out Of Valid Range ("W" Body) | ||
| P1689 | EBCM Or PCM Detects Delivered Torque Signal Is Out Of Valid Range ("W" Body) | ||
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