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 (refer wiring diagram)

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

Spoiler not extending

Diagnosis/Troubleshooting

Work Instruction 1 - 6:

Work Instruction 7 - 14:

Work Instruction 15 - 20:

Spoiler not retracting

Work Instruction 1 - 5:

Work Instruction 6 - 11:

Work Instruction 12 - 20: