Diagnostic Process
Use the following ordered procedure when servicing the ABS/DDRP system.
- Inspect the vehicle for any mechanical conditions related the brake system.
- Brake reservoir fluid level correct.
- Inspect master for fluid for contamination.
- Inspect brake master/modulator for leaks.
- Inspect brake master/modulator for leaks.
- Inspect brake components at all wheels.
- Verify no brake drag exists (brake switch adjustment).
- Verify even brake apply (no pull or lead).
- Inspect for worn/damaged brake pads.
- Inspect for worn/damaged wheel bearings
- Inspect wheel speed sensors/wiring.
- Inspect exciter rings for damage
- Inspect tires for tread depth/wear.
- Road test the vehicle to verify the complaint
- Perform the Diagnostic Circuit Check and proceed to the applicable Diagnostic Trouble Chart as necessary.
- Clear the ABS DTCs (Diagnostic Trouble Codes) after all of the system malfunctions have been corrected.