Mechanical Fault

Mechanical fault

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 or hub. Check that there is no dirt between the sensor and mating surface.
Check that the magnetic pulse wheel is correctly secured and free of damage, scratches (for example scratches, deformation).
Remedy as necessary.

Other information
- Transmission input speed sensor rear wheels Transmission Input Speed Sensor Rear Wheels
- Transmission input speed sensor, front wheels Transmission Input Speed Sensor, Front Wheels





Was a fault detected?

Yes - Verification

No - Checking the connectors and cables

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Checking the connectors and cables
Check the connectors on the brake control module (BCM) and the relevant wheel sensor. Check for contact resistance. Check for oxidation.
Check the connectors and wiring 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, B5254T7 Connecting the Breakout Box, Brake Control Module (BCM)
- Signal description with ABS/STC, B5254T7 Signal Description With ABS/STC
- Signal description with DSTC, B5254T7 Signal Description With DSTC
- Transmission input speed sensor rear wheels Transmission Input Speed Sensor Rear Wheels
- Transmission input speed sensor, front wheels Transmission Input Speed Sensor, Front Wheels
- 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, connectors, etc.
- Ignition on
- Test drive the car according to: 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

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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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