Troubleshooting
Troubleshooting
Checking wheel sensor and toothed wheel
- Ignition off
- Remove the wheel for better accessibility.
Check that the wheel sensor is mounted close to the spindle/hub. There must not be any dirt between the sensor and the contact 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
- For wheel sensor access/replacement: Wheel sensor front, replacing Wheel Sensor Front, Replacing or Wheel sensor rear, replacing Wheel Sensor Rear, Replacing.
Was a malfunction detected?
Yes - Verification
No - Checking connectors and cables
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Checking 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 wiring harness insulation for damage.
Check that the wheel sensor cables are not positioned too close to a source of interference.
Remedy as necessary.
Other information
- Signal specification, brake control module (BCM) with STC/ TRACS, B8444S, B6324S Signal Specification
- Signal specification, brake control module (BCM) with DSTC (dynamic stability and traction control), B8444S, B6324S Signal Specification
- For wheel sensor check/replacement: Wheel sensor front, replacing Wheel Sensor Front, Replacing or Wheel sensor rear, replacing Wheel Sensor Rear, Replacing
- Checking wiring and terminals Checking Wiring and Terminals
Was a malfunction 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 - Troubleshooting procedure complete
No - Troubleshooting information
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Troubleshooting 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 wheel sensor and toothed wheel
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