Spoiler not retracting

DIAGNOSIS/TROUBLESHOOTING CHART (SPOILER NOT RETRACTING) - FAULT CODE 9150

Work instruction			Display OK	If not OK
1	Check fuse	Check fuse D7	Step 2	Replace fuse -> End
2	Check spoiler status	In the menu item "Input signals", select Spoiler status Spoiler completely extended	Display in Porsche System Tester II 9588 : Spoiler is extended	Step 13
3	Check spoiler button	In the menu item "Input signals", select Spoiler button Actuate Retract spoiler button and perform the function check	Display in Porsche System Tester II 9588:" Retract spoiler" button actuated	Check spoiler button or check the wiring from the spoiler button to the instrument cluster -> End
4	Check power supply relay 9 (rear relay carrier)	Switch off ignition Disconnect relay 9 Measure voltage between relay socket pin 5 and ground	Battery voltage Step 5	Short circuit to ground/ open circuit in the wiring between fuse D7 and relay 3 or from relay no. 3 to relay no. 9 Repair wiring harness -> End
5	Check ground lead relay 9 (rear relay carrier)	Measure resistance between relay socket pin 4 and ground Measure resistance between relay socket pin 2 and ground	< 5 Step 6	Repair wiring harness -> End
6	Check control signal from instrument cluster to rear relay carrier	Switch on ignition Actuate Retract spoiler button and at the same time measure voltage between relay socket pin 7 and ground	Spoiler button actuated Battery voltage Step 7	Step 10
7	Replace relay no. 9	Switch off ignition Replace relay no. 9 on rear relay carrier Switch on ignition Actuate Retract spoiler button	Spoiler retracting -> End	Step 8
8	Check ground lead relay no. 3	Pull off relay no. 3 on rear relay carrier Measure resistance between relay socket no.3, pin 4 and ground	< 5 Step 9	Repair wiring harness -> End
9	Check relay no. 3	Jumper pin 4 and pin 3 on relay no. 3 Relay no. 9 is plugged in Actuate Retract spoiler spoiler button	Spoiler retracting Step 16	Step 12
10	Check wire between instrument cluster and relay no. 9 for short to ground	Switch off ignition Pull off plug A on instrument cluster Measure resistance between relay socket pin 7 and ground	Step 11	Repair wiring harness -> End
11	Check wire between instrument cluster and relay no. 9 for open circuit	Measure resistance between relay socket pin 7 and plug A on instrument cluster pin 23	< 5 Step 19	Repair wiring harness -> End
12	Check power supply of the spoiler drive	Switch off ignition Disconnect plug from the spoiler drive Insert both relays Switch on ignition Actuate Retract spoiler button and at the same time measure voltage between spoiler drive plug pin 2 and ground Actuate Extend spoiler button and at the same time measure the voltage between plug on spoiler drive between pin 1 and pin 2	Battery voltage Step 16	Check wiring between spoiler drive and relay no. 3 and relay no. 9
13	Check microswitches	Disconnect plug connection X 23 Remove microswitches Actuate top microswitch manually and at the same time measure resistance on microswitch plug (pin side) between pin 2 and pin 5 Actuate bottom microswitch manually and at the same time measure resistance on microswitch plug (pin side) between pin 4 and pin 5	< 5 Step 14	Step 15
14	Check ground lead between ground point 8 and microswitch for open circuit	Measure resistance between plug connection X 23 pin 5 (sleeve side) and ground	< 5 Step 18	Repair wiring harness -> End
15	Replace microswitch and repeat the function check; if not OK, check wiring to instrument cluster		-> End
16	Replace relay no. 9 on rear relay carrier		-> End
17	Replace spoiler drive		-> End
18	Check wiring from plug connection X 23 to instrument cluster		-> End
19	Replace instrument cluster		-> End