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.
- Micro switches attached to the spoiler control signal the state of the spoiler to the instrument cluster.
- 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, fault code 9150 is stored and the warning text "Failure of spoiler control" is issued on the display.
- Depending on the software version of the instrument cluster, only the warning text is displayed without fault code 9150 being stored.
- The warning text is issued depending on the instrument cluster version after model year 2003.
- If the PSM control module has failed, the spoiler extends as soon as the ignition is switched on for reasons of safety.

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 relay carrier. The spoiler is extended via relay No. 3. The spoiler is retracted via relay No. 9 (Refer wiring diagram)

Affected pins
Instrument cluster connector A, pin 6, pin 7, pin 22 and pin 23

Spoiler does not extend

Diagnosis/Troubleshooting

Work Instruction 1 - 6:

Work Instruction 7 - 12:

Work Instruction 13 - 19:

Spoiler does not retract

Work Instruction 1 - 3:

Work Instruction 4 - 11:

Work Instruction 12 - 19: