Fault Code 4400

Fault Code 4400

Transverse acceleration sensor

Diagnostic conditions
- Transverse acceleration sensor (rate-of-turn sensor) actual value is evaluated and displays an implausible value

Possible cause of fault
- Short circuit to ground/voltage or open circuit in circuit to control module terminals 8, 39
- Wiring/ plug connection faulty
- Transverse acceleration sensor (rate-of-turn sensor) faulty

NOTE: The transverse acceleration sensor and the rate-of-turn sensor are combined in one housing. If a fault is detected in the transverse acceleration sensor, the rate-of-turn sensor must be replaced.

Affected terminals
PSM 5.7 terminals 8, 39
PSM 5.3 terminals 18, 19, 75

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 is combined with the transverse acceleration







Diagnosis/troubleshooting PSM 5.3







Transverse acceleration sensor