Faulty Signal

Faulty signal

Checking the wheel sensor and pulse wheel




- Ignition off.
- Remove the wheel for better access.
Check that the relevant wheel sensor is mounted tightly against the shaft/hub. Check that there is no dirt between the sensor and mating surface.
Check that the toothed wheel is properly mounted and is free from damage (all teeth intact, no scratches or deformity, etc.)
Remedy as necessary.

Other information
- Wheel sensor front, replacing Wheel Sensor Front, Replacing
- Wheel sensor rear, replacing Wheel Sensor Rear, Replacing





Was a fault detected?

Yes - Verification

No - Checking the brakes and wheel bearings

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Checking the brakes and wheel bearings

Hint: A binding brake may block some or both wheels when driving. This will mean that the wheel sensor signal is not transmitted.

Check that the brake calipers are not sticking and locking the wheels.
Check the wheel bearing on the relevant wheel for play. Check that the wheel rotates freely and is not sticking.
Remedy as necessary.

Other information
- Brake calipers front, replacing Removal and Replacement
- Brake calipers rear, replacing Removal and Replacement
- Front wheel hub, replacing Front Wheel Hub, Replacing
- Rear wheel hub, replacing Rear Wheel Hub, Replacing





Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Test drive the car. See Test Drive Form (DSTC (dynamic stability and traction control) /brake control module), description Test Drive Form (DSTC (Dynamic Stability And Traction Control) /Brake Control Module), Description.
Check the ABS warning lamp during the test drive.
If the fault has been remedied the lamp will go out when the speed exceeds 20 km/h.
If the warning lamp does not go out, return to the workshop and read off the diagnostic trouble codes (DTCs).

Does the ABS warning lamp go out and remain unlit?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

PAPER - No Fault Found

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the wheel sensor and pulse wheel

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