Spoiler not extending

DIAGNOSIS/TROUBLESHOOTING - FAULT CODE 9150 - SPOILER NOT EXTENDING

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 retracted	Display in the Porsche System Tester II 9588 : Spoiler is retracted	Step 13
3	Check spoiler key	In the menu item "Input signals", select Spoiler key Actuate key Extend spoiler and perform the function check	Display in the Porsche System Tester II 9588 : Spoiler button "extend" actuated	Check spoiler key or check the wiring from the spoiler key to the instrument cluster -> End
4	Check power supply relay 3 (rear relay carrier)	Switch off ignition Disconnect relay 3 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 3 (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 3 (relay carrier)	Switch on ignition Actuate button Extend spoiler and at the same time measure the voltage between plug on relay socket pin 7 and ground	Battery voltage Step 7	Step 10
7	Replace relay 3	Switch off ignition Replace no. 3 on rear relay carrier Switch on ignition Actuate button Extend spoiler	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 17	Step 12
10	Check wire between instrument cluster and relay no. 3 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. 3 for open circuit	Measure resistance between relay socket pin 7 and plug A on the instrument cluster pin 7	< 5 Step 12	Repair wiring harness -> End
12	Check power supply of the spoiler drive	Switch off ignition Insert relay no. 9 Pull plug off the rear spoiler Switch on ignition Actuate button Extend spoiler and at the same time measure the voltage between plug on rear spoiler pin 1 and ground Actuate button Extend spoiler and at the same time measure the voltage between plug on spoiler drive between pin 1 and pin 3	Battery voltage Step 13	Check wiring between rear spoiler plug, relay no. 3 and relay no. 9. ->End
13	Check micro switch (rear spoiler retracted)	Switch off ignition Pull plug off the rear spoiler Measure resistance on pins 4 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 between 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 pin 4 to plug A on the instrument cluster pin 22	< 5 Step 20	Repair wiring harness -> End
16	Replace rear spoiler and re-perform the function check.		-> End	Step 15
17	Replace relay no. 9 on rear relay carrier		-> End	Step 18
18	Check drive motor on rear spoiler	Switch off ignition Pull plug of 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