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 Sensors, Rear, Replacing





Was a fault detected?

Yes - Verification

No - Checking the connectors and cables

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Checking the connectors and cables
Check the connectors of the brake control module (BCM) and the relevant wheel sensors for contact resistance and oxidation.
Check the connectors and cable insulation for damage.
Check that the wheel sensor cables are not too close to sources of interference.
Remedy as necessary.

Other information
- Connecting the breakout box, brake control module (BCM) Connecting the Breakout Box
- Wheel sensor front, replacing Wheel Sensor, Front, Replacing
- Wheel sensor rear, replacing Wheel Sensors, Rear, Replacing
- Signal specification, brake control module (BCM) with STC/ TRACS Signal Specification, Brake Control Module (BCM) with STC/ TRACS
- Checking wiring and terminals Checking Wiring And Terminals









Was a fault detected?

Yes - Verification

No - No Fault Found

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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 - Verification completed

No - Fault-tracing information

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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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the wheel sensor and pulse wheel

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