Wheel Speed Sensor Open Circuit, Interruption Detection (IA left)
- Check, if configuration of the ABS system is correct (i.e 4-channel vehicle, but 6-channel configuration of ABS-ECU ?) - Check wiring and the relating electric connectors of the relevant wheel speed sensor (interruption?) - Check the wheel speed sensor (internal interruption?) - Replace the ABS-ECU, if the configuration, wiring and the wheel speed sensor are faultless
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 deactivated EBL is not deactivated Drag Torque Control is only deactivated, if the intermediate axle
Diagnostic depth
An interruption of the left wheel speed sensor at the intermediate-axle is detected. The measured resistance is too high. Remark: A wiring-mixture of wheelspeed sensor lines left/right could also lead to failure detections "interruption" or "shorted to GND" on both sides.
- configuration of the ABS system is not correct (i.e 4-channel vehicle, but 6-channel configuration of ABS-ECU) - wiring or relating electric connectors of the relevant wheel speed sensor is interrupted - wheel speed sensor has internal interruption - ABS-ECU defective