Diagnostic Test

With the scan tool, monitor ALL the WSS speeds while an assistant drives the vehicle.

Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph).

Does the Left Rear WSS speed differ from the other WSS speeds by 8 Km/h (5 mph) or show NO speed? 

Yes 

1. Go To Step  2).

No 

1. Perform the ABS Intermittent Condition diagnostic procedure in this Section.
2. Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to BRAKES - DIAGNOSIS AND TESTING - ABS-INTERMITTENT CONDITION) .

Turn the ignition off.

Visually inspect the tone wheel and bearing for damage.

1. Check the tone wheel teeth for missing teeth, cracks, and looseness. The teeth must be perfectly square, not bent, or nicked. Check the wheel bearing for worn/looseness.

Were any problems found? 

Yes 

1. Repair as necessary.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST)  .

No 

1. Go To Step  3).

Check the Anti-Lock Brakes Module and Wheel Speed Sensors harness connectors for incorrectly wired connectors.

Were any problems found? 

Yes 

1. Repair as necessary.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST)  .

No 

1. Go To Step  4).

Replace the Left Rear Wheel Speed Sensor in accordance with the Service Information.

Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST)  .

Road test the vehicle over 40 km/h (25 mph).

With the scan tool, read ABS DTCs.

Did DTC C1048-LEFT REAR WHEEL PRESSURE PHASE MONITORING reset? 

Yes 

1. Replace the Anti-Lock Brakes Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST)  .

No 

1. Test Complete.