Spoiler not extending

DIAGNOSIS/TROUBLESHOOTING CHART (SPOILER NOT EXTENDING) - 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 retracted	Display in Porsche System Tester II 9588 : Spoiler is retracted	Step 13
3	Check spoiler button	In the menu item "Input signals", select Spoiler button Actuate Extend spoiler button and perform the function check	Display in Porsche System Tester II 9588:" Extend spoiler" button actuated	Check spoiler button or check the wiring from the spoiler button to the instrument cluster -> End
4	Check power supply relay 3 (rear relay carrier)	Switch off ignition Disconnect relay 3 Measure voltage between relay socket pin 5 and ground	Battery voltage Step 5	Short circuit to ground/open circuit in the wire between fuse D7 and relay 3 Repair wiring harness -> End
5	Check ground lead relay 3 (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 relay carrier	Switch on ignition Actuate Extend spoiler button and at the same time measure voltage between relay socket pin 7 and ground	"Extend spoiler" button actuated Battery voltage Step 7	Step 10
7	Replace relay	Switch off ignition Replace no. 3 on rear relay carrier Switch on ignition Actuate Extend spoiler button	Spoiler extends -> End	Step 8
8	Check ground lead relay no. 9	Pull off relay no. 9 on rear relay carrier Measure resistance between relay socket no. 9, pin 4 and ground	< 5 Step 9	Repair wiring harness -> End
9	Check relay no. 9	Jumper pin 4 and pin 3 on relay no. 9 Relay no. 3 is plugged in Actuate button Extend spoiler	Spoiler extends Step 16	Step 12
10	Check wire between instrument cluster and relay no. 3 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 3 for open circuit	Measure resistance between relay socket pin 7 and plug A on instrument cluster pin 7	< 5 Step 19	Repair wiring harness -> End
12	Check power supply of the spoiler drive	Switch off ignition Insert relay no. 9 Disconnect plug from the spoiler drive Switch on ignition Actuate Extend spoiler button and at the same time measure voltage between plug X 23 on spoiler drive pin 1 and ground Actuate Retract spoiler button and at the same time measure voltage on plug X 23 of spoiler drive between pin 1 and pin 3	Battery voltage Step 17	Check wiring between spoiler drive, relay no. 3 and relay no. 9. -> End
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