Antilock Control

Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

NOTE: Prior to any testing or inspection, the vehicle should be check for any relevant warning lamps being illuminated. If a warning lamp is illuminated, check for DTCs and refer to the relevant DTC Index, if no warning lamp is illuminated, continue with diagnostic procedures below.

1. Verify the customer concern.
2. Visually inspect for obvious signs of damage and system integrity.





3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. If the cause is not visually evident, check the anti-lock braking system and steering rotation sensor modules for Diagnostic Trouble Codes (DTCs) and refer to the relevant DTC Index.