0xD91202 Wheel Speed Sensor Wheel 3-Data Erratic, Intermittent Or Incorrect
Action: Check the cables and connectors between EPM and wheel-speed sensor for short-circuits (between H and L) and open-circuits. Measure Voltage between EPM GND and wheel speed sensor (any pin) Voltage must in range 0.5-4.3V. Disconnect wheel speed sensor from EPM. Measure resistance of Sensor and cabling. Resistance must be between 800 x85. 2000 Ohm. Measure insulation resistance of sensor and cabling to vehicle GND. Resistance must be > 200kOhm. Check and correct air gap between wheel speed sensor and tone wheel by measuring the wheel speed signal (Wheel speed sensor signal must be higher than 100mV peak to peak at wheel speed of about 3-5km/h). Switch left/right WSS (with brakeout box) and see if the problem remain on the same side (vehicle has to be driven) =>replace EPM. If problem move to other side change defect sensor
What you'll see
Symptom:
System reaction
SystemReaction: ABS restricted. ESP control off. ATC off. DTC off. Diff-lock maybe restricted. HSA off. Trailer Brake off. Wheel Brake Monitoring off. ABS Warning Lamp.
Diagnostic depth
Detection: If not plausible drops of the wheel speed signal happen (signal is frequently jumping between above 11[km/h] and zero), error is set.
Cause: Damage of cables or connectors (Short circuit between H and L) Too large airgap between tone wheel and wheel speed sensor, damage of wheel speed sensor mounting, damaged or wrong tone wheel, damaged wheel speed sensor or EPM electronic circuit