Porsche Stability Management (PSM)

Fault Code 0778

Steering-angle sensor


CAUTION: The steering-angle sensor must always be initialised 'control lamp on' whenever the battery terminal is disconnected.

Diagnostic conditions

- Ignition on
- Internal PSM control module function test

Possible cause of fault

- Initialisation/calibration not performed (no display/no or incorrect basic setting/adaptation)
- Mechanical fault
- The signal received from the PSM control module about the CAN drive does not correspond to the expected signal (implausible signal)
- CAN drive faulty (no signal/communication)
- Steering-angle sensor faulty

Affected pins

PSM control module plug:
- Pin 11 'CAN drive (high)'
- Pin 15 'CAN drive (low)'

Diagnosis/troubleshooting PSM 0101

INITIALISING

The steering-angle sensor in Cayenne must be initialised after the following work is carried out:
- Whenever the power supply is interrupted (PSM indicator light on).
- The steering-angle sensor must be calibrated after all work on the running gear.

NOTE: Calibration of the steering-angle sensor must be performed on a measuring platform. First, the PSM control module must be coded successfully and the steering-angle sensor must be initialised. The steering-angle sensor must be calibrated after work has been carried out on the running gear in the area of the front axle.