Initial Inspection and Diagnostic Overview

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.
1 Verify the customer concern.
2 Confirm if the Anti-Lock Brake System (ABS) warning light was illuminated, or still is.

NOTE:
An intermittent fault may allow the warning light to go off. This does not necessarily mean the fault is not present. Some warnings will appear to clear when the ignition is cycled. This is often because the warning has flagged as a result of one of the vehicle's on-board diagnostic routines having run to detect the fault. If the same routine is not run when the ignition status is set to ON, the warning will not re-flag until the routine does run.
3 Visually inspect for obvious signs of damage and system integrity.





4 If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5 If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC index.


DTC Index
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to A L L Diagnostic Trouble Codes ( DTC ). For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Anti-Lock Braking System (ABS) Diagnostic Trouble Code Descriptions