Spoiler not retracting

DIAGNOSIS/TROUBLESHOOTING - FAULT CODE 9150 - SPOILER NOT RETRACTING

Work instruction			Display OK	If not OK
1	Check fuse	Check fuse D 7	Step 2	Replace fuse -> End
2	Check spoiler status	In the menu item "Input signals", select Spoiler status Spoiler completely extended	Display in the Porsche System Tester II 9588: Spoiler is extended	Step 13
3	Check spoiler key	In the menu item "Input signals", select Spoiler key Actuate button Retract spoiler and perform the function check	Display in the Porsche System Tester II 9588 : Spoiler button "retract" 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 Switch on ignition 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)	Switch off ignition 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 9 (rear relay carrier)	Switch on ignition Actuate button Retract spoiler and at the same time measure the voltage between plug on relay socket pin 7 and ground	Retract spoiler key actuated Battery voltage Step 7	Step 10
7	Replace relay 9	Switch off ignition Replace relay no. 9 on rear relay carrier Switch on ignition Actuate button Retract spoiler	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 button Retract spoiler	Spoiler retracting Step 17	Step 12
10	Check wire between instrument cluster and relay no. 9 for short circuit to ground	Switch off ignition Remove plug A from the 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 the instrument cluster pin 23	< 5 Step 12	Repair wiring harness -> End
12	Check power supply of the spoiler drive	Switch off ignition Insert relay No. 3 Disconnect plug from the spoiler drive Switch on ignition Actuate button Retract spoiler and at the same time measure the voltage between plug on spoiler drive pin 3 and ground Actuate button Retract spoiler and at the same time measure the voltage on the plug of the rear spoiler between pin 1 and pin 3	Battery voltage Step 13	Check wiring between rear spoiler and relay no. 3 and relay no. 9. -> End
13	Check micro switch	Switch off ignition Pull plug off the rear spoiler Measure resistance on pins 2 and 5	< 5 Step 14	Step 16
14	Check ground lead between ground point 8 and micro switch for open circuit	Measure resistance on rear spoiler plug pin 5 (sleeve side) and ground	< 5 Step 15	Repair wiring harness ->End
15	Check wiring from rear spoiler plug to instrument cluster	Measure resistance on rear spoiler plug between pin 5 (sleeve side) and ground	< 5 Step 20	-
16	Replace rear spoiler and re-perform the function check		-> End	Step 18
17	Replace relay no. 9 on rear relay carrier		-> End	Step 19
18	Check drive motor on rear spoiler	Switch off ignition Pull plug off the rear spoiler Measure resistance between pins 1 and 3	approx. 1.6 -> End	Step 19
19	Replace drive motor on rear spoiler		-> End
20	Replace instrument cluster		-> End