Fault Code 9150

Fault code 9150

Spoiler control

Diagnostic conditions
- Vehicle speed higher than 120 km/h and then lower than 60 km/ h
- Manual actuation

NOTE:
- From a vehicle speed of 120 km/h, the spoiler is extended and retracts again when the speed falls below 60 km/h. This is controlled via the instrument cluster.
- By means of microswitches which are attached to the spoiler control, the instrument cluster receives the checkback of faults concerning the spoiler state
- The instrument cluster expects the checkback concerning the new state of the spoiler after the speed exceeds or falls below the limit and after relevant activation. If a state change is not registered despite the control, the fault code 9150 is stored and the warning text "Failure of spoiler control" is emitted on the display.
- The warning text is displayed, depending on the version of the instrument cluster after model year 2003.
- On failure of the PSM control module, the spoiler extends as soon as the ignition is switched on.

Possible cause of fault
- Fuse D7 faulty
- Relay faulty
- Micro switch faulty
- Short circuit to ground/open circuit in the wiring between instrument cluster and relay carrier or spoiler control
- Spoiler drive faulty

NOTE: The relays are in the rear area of the relay carrier. The spoiler is extended via relay no. 3. The spoiler is retracted via relay no.9 (see wiring diagram)

Affected pin
Instrument cluster connector A, pin 5, pin 6, pin 7, pin 21, and pin 23

Spoiler not extending

Diagnosis/troubleshooting

Part 1:

Part 2:

Part 3:

Spoiler not retracting