Diagnostic Test

1) COMPARE WHEEL SPEED SENSOR SIGNALS
WARNING: Ensure brake capability is available before road testing.

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 Right Front WSS speed differ from the other WSS speeds by 8 km/h (5 mph) or show NO speed?

Yes
1. Go to 2).
No
1. Perform ABS-INTERMITTENT CONDITION TEST .
2) INSPECT TONE WHEEL/BEARING
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 .
No
1. Go to 3).
3) CHECK WHEEL SPEED SENSOR WIRING
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 .
No
1. Go to 4).
4) RIGHT FRONT WHEEL SPEED SENSOR
Replace the Right Front Wheel Speed Sensor in accordance with the Service Information.

Perform ABS VERIFICATION TEST .

CAUTION: Ensure brake capability is available before road testing.

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

NOTE: Vehicle must be driven above 40 km/h (25 mph) for set conditions to be meet.

With the scan tool, read ABS DTCs.

NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at 12 km/h (7.5 mph) before it will extinguish the ABS indicators.

Did DTC C1047-RIGHT FRONT WHEEL PRESSURE PHASE MONITORING reset?

Yes
1. Replace the Anti-Lock Brakes Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .
No
1. Test Complete.