Wheel Speed Sensor Abnormal Speed Detection (RA left)
If the failure is not sporadic and occurs several times, then the following workshop activity is suitable: - Check the fixing and mounting of the relevant wheel speed sensor (Can vibrations cause chattering ?) - Check the relevant foundation brake for inadmissable vibrations (return spring defect ? brake linings loosened ?)
What you'll see
No driver-visible symptom recorded.
System reaction
ABS function at relevant wheel is switched off ABS function at other wheels is still available ATC engine and brake control is switched off HSA is not deactivated EBL is not deactivated Drag Torque Control is deactivated
Diagnostic depth
- Brake squeezes or chatters was detected - An inadmissable wheel speed signal on the left side of the rear axle was detected. Indication: The fault is not interpreted respectively stored with standard parameter setting. Set the parameter accordingly, if necessary.
- fixing and mounting of the relevant wheel speed sensor faulty (vibrations) - foundation brake defect (return spring defect or brake linings loosened)