Spoiler

Instrument Cluster K22, K23, K27
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 status
- The instrument cluster expects the checkback concerning the new status of the spoiler after the speed exceeds or falls below the limit and after relevant activation. If a change in status 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.
- Depending on the software version of the instrument cluster, only the warning text is displayed without the fault code 9150 being stored.
- In GT2 vehicles, depending on the software version, the fault code "9150 spoiler control" is stored (without warning text in display). This is a software problem and the fault entered should be ignored.
- 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
- Relays 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 Vehicle/Diagrams)

Affected Terminals:
Connector A, terminals 6, 7, 22, 23

Diagnosis/troubleshooting

Spoiler not extending

Work Instruction 1 - 6:

Work Instruction 7 - 12:

Work Instruction 13 - 19:

Spoiler not retracting

Work Instruction 1 - 3:

Work Instruction 4 - 11:

Work Instruction 12 - 19: