C1047

C1047-92-RIGHT FRONT WHEEL PRESSURE PHASE MONITORING - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
During active ABS control.

- Set Condition:
If the Anti-Lock Brake System (ABS) Module detects a pressure reduction phase and the following pressure hold phase is too long.





1. VERIFY THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Freeze Fame information.
4. With the scan tool, erase DTCs.
5. Start the engine.
6. Test drive the vehicle above 40 km/h (25 mph).
7. With the scan tool, read and record DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Perform the ABS INTERMITTENT CONDITION TEST. Testing and Inspection.

2. COMPARE WHEEL SPEED SENSOR SIGNALS

WARNING: Make sure brake capability is available before road testing.

1. With the scan tool, monitor ALL the WSS speeds while an assistant drives the vehicle.
2. 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

- Go To 4

No

- Go To 3

3. CHECKING INSIDE WHEEL SPEED
1. Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph) and perform a 90 degree turn while monitoring if inside wheel is slower than outside.

Was the inside wheel slower than outside?

Yes

- Perform the ABS INTERMITTENT CONDITION TEST. Testing and Inspection.

No

- Go To 4

4. INSPECT TONE WHEEL/BEARING
1. Turn the ignition off.
2. Visually inspect the tone wheel and bearing for damage.
3. 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

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 5

5. CHECK WHEEL SPEED SENSOR (WSS) WIRING
1. Check the ABS Module and WSS harness connectors for incorrectly wired connectors.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 6

6. RIGHT FRONT WHEEL SPEED SENSOR (WSS)
1. Replace the Right Front Wheel Speed Sensor (WSS). Wheel Speed Sensor - Removal.
2. Perform the ABS VERIFICATION TEST. ABS Verification Test.

CAUTION: Make sure brake capability is available before road testing.

3. 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.

4. 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.

Does the DTC remain active?

Yes

- Replace the Anti-Lock Brake Module. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test complete.