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POSSIBLE CAUSES WHEEL SPEED SIGNAL FAILURE DTC PRESENT AFFECTED WHEEL SPEED SENSOR SIGNAL INOPERATIVE AFFECTED WHEEL SPEED SENSOR CONNECTOR DAMAGED AFFECTED WHEEL SPEED SENSOR TONE WHEEL DAMAGED AFFECTED WHEEL SPEED SENSOR AIR GAP FAULT WHEEL BEARING FAULT BRAKE LINING FAULT AFFECTED WHEEL SPEED SENSOR CIRCUIT ELECTRICAL FAULT TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTCs. With the DRBIII t, read Freeze Frame information. NOTE: The CAB must sense ALL 4 wheels at 25 km/h (15 mph) before it will t display WHEEL SPEED/SIGNAL FAILURE and SENSOR CIR- CUIT FAILURE? All Yes → Refer to the affected Wheel Speed SENSOR CIRCUIT FAILURE for the related symptom(s). No → Go To 2 2 Turn the ignition on. t in Sensors, monitor ALL the Wheel Speed Sensor Signals while an assistant drives the vehicle. All Yes → Go To 3 No → The condition is not present at this time. Monitor DRBIIIt parameters while wiggling the related wiring harness. Refer to 3 Turn the ignition off. All Yes → Repair as necessary. Perform ABS VERIFICATION TEST - VER 1. No → Go To 4 25 BRAKES (CAB) LEFT FRONT WHEEL SPEED SIGNAL FAILURE — Continued |