Fault Code 4400

Fault Code 4400

Transverse Acceleration Sensor

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.

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

Affected terminals
- Terminals 8, 39

Diagnosis/troubleshooting, Rate-of-turn sensor 996.606.145.00 as of 08/00

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.

The following troubleshooting procedure applies to the transverse acceleration sensor (rate-of-turn sensor) 996.606.145.00 as of 08/00




Transverse acceleration sensor (rate-of-turn sensor) 996.606.145.00




Work instructions 1 to 3




Work instructions 4 to 6

Diagnosis/troubleshooting, Rate-of-turn sensor 996.606.147.00 up to 07/00

NOTE: If the transverse acceleration sensor (rate-of-turn sensor) with part No. 996.606.147.00 is determined to be faulty, the new transverse acceleration sensor (rate-of-turn sensor) with part No. 996.606.145.00 must be installed. The front centre console holder and the lower front centre console support must be replaced for this purpose. An adapter plug must be used for the plug connection.

The following troubleshooting procedure applies to the transverse acceleration sensor (rate-of-turn sensor) 996.606.147.00 up to 07/00.




Transverse acceleration sensor (rate-of-turn sensor) 996.606.147.00





Work instructions 1 to 6