C1046

C1046 - LEFT FRONT WHEEL PRESSURE PHASE MONITORING

For a complete wiring diagram, refer to Electrical Diagrams

- When Monitored:

During active ABS control.

- Set Condition:

If the Anti-Lock Brake Module detects a pressure reduction phase and the following pressure hold phase is too long.





1. COMPARE WHEEL SPEED SENSOR SIGNALS

WARNING: TO avoid possible serious or fatal injury, check brake capability 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 25 mph (40 km/h).

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

Yes

- Go To 2

No

- Perform the ABS INTERMITTENT CONDITION TEST.

2. INSPECT TONE WHEEL/BEARING

Turn the ignition off.

Visually inspect the tone wheel and bearing for damage.

- 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 wear/looseness.

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST.

No

- Go To 3

3. CHECK WHEEL SPEED SENSOR WIRING

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

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST.

No

- Go To 4

4. LEFT FRONT WHEEL SPEED SENSOR

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

Perform ABS VERIFICATION TEST.

WARNING: To avoid possible serious or fatal injury, check brake capability before road testing.

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

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

With the scan tool, read ABS DTCs.

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

Did DTC C1046 - LEFT FRONT WHEEL PRESSURE PHASE MONITORING reset?

Yes

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST.

No

- Test complete.