Fault Code 4420
Fault Code 4420
Rate-of-turn sensor
Diagnostic conditions
- Rate-of-turn sensor actual value is evaluated and displays an implausible value
Possible cause of fault
- Short circuit to ground/B+ or open circuit
- Wiring/plug connection faulty
- Rate-of-turn sensor faulty
- PSM control module faulty
Affected terminals
PSM 5.7 terminals 9, 10, 21, 39, 41
PSM 5.3 terminals 34, 77, 78, 79, 80
Diagnosis/troubleshooting PSM 5.7
NOTE: If the fault codes 4400 Transverse acceleration sensor, 4420 Rate-of-turn sensor and 4440 Steering-angle sensor are displayed together, there may be an open circuit in the circuit to control module terminal 39.
Rate-of-turn sensor with combined transverse acceleration sensor
Work Instruction 1 - 6:
Work Instruction 7 - 8:
Diagnosis/troubleshooting PSM 5.3
Rate-of-turn sensor
Work Instruction 1 - 2:
Work Instruction 3 - 8:
