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0P-115 0706
35, Multi-function switch
Diagnosis conditions
� Ignition on
� Selector lever in a position
Possible fault cause
♦ Short circuit to ground/B+/mutual short circuit or open circuit between control module and multi-function switch
♦ Multi-function switch is faulty
♦ Tiptronic control module is faulty
Affected pins
Pin 8, pin 9, pin 36, pin 37, pin 25
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check adjustment of selector lever cable ♦ Ignition on
♦ Connect Porsche System Tester ll No. 9588
♦ Select menu item
'Input signals – multi-
function switch'
♦ Move selector lever through the posi- tions one by one and compare with indica- tion on the instru- ment cluster and on the Porsche System Tester ll No. 9588 => Step 2 => Rep. Gr. 371515; Adjust- ing selector lever cable
→ End
2 Visual inspection ♦ Check all relevant plug connections and wiring for damage => Step 3 Repair wiring harness
→ End
Work instruction Display OK If not OK
3 Check multi-func- tion switch ♦ Ignition off
♦ Unplug connector from multi-function switch
♦ Actuate selector lever
♦ Measure resistance between switch pin E and pin A � In selector lever position
P or N or D
< 5 Ω
� In selector lever position
R
° Ω Multi-function switch faulty
=> Step 9
♦ Measure resistance between switch pin E and pin B � In selector lever position
R or N
< 5 Ω
� In selector lever position
P or D
° Ω
♦ Measure resistance between switch pin E and pin C � In selector lever position
N or D
< 5 Ω
� In selector lever position
P or R
° Ω
♦ Measure resistance between switch pin E and pin D � In selector lever position
D
< 5 Ω
� In selector lever position
P or R or N
° Ω
=> Step 4
4 Check ground con- nection for the multi-function switch ♦ Ignition off
♦ Measure resistance between connector, pin E, and ground < 5 Ω
=> Step 5 Repair wiring harness
→ End
Work instruction Display OK If not OK
5 Check position- switch wiring between control module, instru- ment cluster and multi-function switch for short circuit to B+ ♦ Ignition off
♦ Remove connector from Tiptronic control module
♦ Remove connector II from instrument clus- ter
♦ Ignition on
♦ Measure voltage between control module connector, pin 8, and ground
♦ Measure voltage between control module connector, pin 9, and ground
♦ Measure voltage between control module connector, pin 36, and ground
♦ Measure voltage between control module connector, pin 37, and ground < 0.3 V
=> Step 6 Repair wiring harness
→ End
6 Check position- switch wiring between control module, instru- ment cluster and multi-function switch for short circuit to ground ♦ Ignition off
♦ Measure resistance between control module connector, pin 8, and ground
♦ Measure resistance between control module connector, pin 9, and ground
♦ Measure resistance between control module connector, pin 36, and ground
♦ Measure resistance between control module connector, pin 37, and ground
° Ω
=> Step 7 Repair wiring harness
→ End
Work instruction Display OK If not OK
7 Check position- switch wiring between control module and multi- function switch for open circuit and swapped connec- tion ♦ Ignition off
♦ Measure resistance between control module connector, pin 8, and multi-func- tion switch connec- tor, pin B
♦ Measure resistance between control module connector, pin 9, and multi-func- tion switch connec- tor, pin D
♦ Measure resistance between control module connector, pin 36, and multi- function switch con- nector, pin A
♦ Measure resistance between control module connector, pin 37, and multi- function switch con- nector, pin C < 5 Ω
=> Step 8 Repair wiring harness
→ End
8 Check position- switch wiring between control module and instru- ment cluster for open circuit and swapped connec- tion ♦ Ignition off
♦ Measure resistance between control module connector, pin 8, and instru- ment cluster connec- tor II, pin 19
♦ Measure resistance between control module connector, pin 9, and instru- ment cluster connec- tor II, pin 2
♦ Measure resistance between control module connector, pin 36, and instru- ment cluster connec- tor II, pin 18
♦ Measure resistance between control module connector, pin 37, and instru- ment cluster connec- tor II, pin 3 < 5 Ω
=> Step 10 Repair wiring harness
→ End
Work instruction Display OK If not OK
9 ♦ Replace multi-function switch → End
10 ♦ Replace Tiptronic control module → End
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