Fault Code 4440

Fault Code 4440

Steering-angle sensor
Steering angle sensor actual value is evaluated and displays an implausible value.

Steering angle sensor up until MY 2002 with 4-pole plug

- As of model year 2003 a new steering angle sensor with 6-pole plug is installed.
- When troubleshooting follow the relevant work instruction, since the pin assignment has changed.

Diagnostic conditions
- Steady forward speed on curves and straight ahead at no less than 20 km/h

Possible cause of fault

This fault may also be displayed in the event of faults with the running gear setting.

- Steering angle sensor calibration incorrect
- Short circuit to B+/ground or open circuit in control unit circuit
- Steering angle sensor incorrectly installed
- Steering angle sensor faulty
- PSM control unit faulty

Affected pins
Pin 21, pin 39, pin 24 and pin 40

Diagnosis/troubleshooting up until MY 2002

Part 1:

Part 2:

Diagnosis/troubleshooting as of MY 2003