Faulty Signal
Faulty signal
Checking the connectors and cables
Check relevant wheel sensor and ABS control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check wiring and cable splices for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check connectors and wiring insulation for damage.
Check that wheel sensor wiring is not too close to sources of interference such as electric motors, ignition cables, car telephone wiring etc.
Remedy as necessary.
Other information:
- To disconnect control module connector, see Replacing the control module Service and Repair.
- To disconnect wheel sensor connector, see Rear wheel sensor, with integrated cabling, replacement Rear Wheel Sensor, With Integrated Cabling, Replacement.
- To connect the breakout box, see Signal specification, ABS control module Signal Specification, ABS Control Module.
Was a fault detected?
Yes - Verification
No - Checking wheel sensor and pulse wheel
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Checking wheel sensor and pulse wheel
- Remove wheel for better access.
Check that relevant wheel sensor is fitted tightly against shaft/hub. Check that there is no dirt between the sensor and mating surface.
Check that the relevant pulse wheel is correctly secured and free of damage, scratches etc.
Remedy as necessary.
Other information:
- To remove/replace rear wheel sensor, see Rear wheel sensor, with integrated cabling, replacement Rear Wheel Sensor, With Integrated Cabling, Replacement.
- To check/replace rear pulse wheel, see Replacing rear wheel hub/stub axle Replacing Rear Wheel Hub/Stub Axle.
Was a fault detected?
Yes - Verification
No - Checking brakes and wheel bearings
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Checking brakes and wheel bearings
Hint: A sticking brake or parking brake may have blocked one or both wheels during driving. This will mean that the wheel sensor signal is not transmitted.
Check that the parking brake is not sticking or in contact with anything.
Check that brake calipers are not sticking and blocking the wheels.
Check wheel bearing on relevant wheel for play and sticking.
Remedy as necessary.
Other information:
- To check/adjust parking brake, see Parking brake Service and Repair.
- To check/replace brake calipers, see Brake caliper rear, overhaul Brake Caliper Rear, Overhaul.
- To check/adjust rear wheel bearings, see Replacing rear wheel hub/stub axle Replacing Rear Wheel Hub/Stub Axle.
Select Continue when the fault has been remedied.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Connect control module.
- Reconnect connectors, reinstall components.
- Test drive car according to Test driving .
Note! Vehicle speed must be above 40 km/h (28.6 mph) for more than 2 minutes.
- Read off the diagnostic trouble code (DTC) counters.
Check the counter value. The control module interprets a counter value greater than 0 as an intermittent fault. The control module interprets a counter value of 0 as a permanent fault. If the value changes it indicates that the fault has been remedied.
Is counter value greater than 0?
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 connectors and cables
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