C1041

C1041-LEFT FRONT TONE WHEEL PERFORMANCE

- When Monitored:

With the ignition on.

- Set Condition:

When the Anti-Lock Brake Module detects periodic drops of a WSS signal.

Possible Causes

- LEFT FRONT TONE WHEEL

Diagnostic Test

1. CHECK FOR A DTC C1041-LEFT FRONT TONE WHEEL PERFORMANCE

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, read DTCs.

Record DTC and Freeze Frame information.

With the scan tool, erase DTCs.

Cycle the ignition switch off then on.

CAUTION: Ensure brake capability is available before road testing.

Test drive the vehicle in a straight line to 40 km/h (25 mph).

With the scan tool, read DTCs.

Does the scan tool display: C1041-LEFT FRONT TONE WHEEL PERFORMANCE?

Yes

- Go to 2

No

- Perform the ABS Intermittent Condition diagnostic procedure. Testing and Inspection.
- Perform ABS VERIFICATION TEST.

2. CHECK THE LEFT FRONT TONE WHEEL FOR DAMAGE

NOTE: Check the tone wheel teeth for missing teeth, cracks, or looseness Teeth should be perfectly square, not bent, or nicked

Check the left front tone wheel for damage.

Were any problems found?

Yes

- Replace the left front tone wheel.
- Perform ABS VERIFICATION TEST VER 1. ABS Verification Test

No

- Test Complete