Abs/TRACS Function Check
- Turn ignition on. If ABS and TRACS warning lights come on for at least one second, go to next step. If ABS and TRACS warning lights do not come on for at least one second, go to ABS WARNING INDICATOR DOES NOT LIGHT or TRACS WARNING INDICATOR DOES NOT LIGHT under SYMPTOM DIAGNOSIS.
- Wait 3 seconds. If ABS and TRACS warning lights go out, go to next step. If ABS and TRACS warning lights do not go out, check for diagnostic trouble codes. Go to ACCESSING DIAGNOSTIC TROUBLE CODES. If codes cannot be read or are not displayed, go to ABS WARNING INDICATOR LIGHTS, NO TROUBLE CODE DISPLAYED or TRACS WARNING INDICATOR LIGHTS, NO TROUBLE CODE DISPLAYED under SYMPTOM DIAGNOSIS. If codes are present, go to ABS/TRACS DIAGNOSTIC TROUBLE CODES table. Always begin diagnosis with highest diagnostic trouble code.
- Check for diagnostic trouble codes. If codes cannot be read, go to DIAGNOSTIC TROUBLE CODES CANNOT BE READ under SYMPTOM DIAGNOSIS. If no codes are displayed, test drive vehicle and note symptoms. Go to TEST DRIVING VEHICLE, then go to step 4). If codes are displayed, go to CHECKING INTERMITTENT FAULTS to determine probable cause of fault. Record, then erase codes. Test drive vehicle and note any other symptoms. Go to TEST DRIVING VEHICLE, then go to step 4).
- If ABS and/or TRACS warning indicator lights during test drive, check for trouble codes. If no codes are present, check if ABS or TRACS warning light circuit has been grounded.
- If ABS and/or TRACS warning light does not light during test drive, check if any other symptoms of a faulty ABS or TRACS system are present. If symptoms are present, go to POOR BRAKING, BOTH FRONT WHEELS ARE COMPLETELY OR PARTIALLY LOCKED or NO TRACS FUNCTION under SYMPTOM DIAGNOSIS. If symptoms are not present, no faults are present, or problems or symptoms are intermittent.