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9603 Telephone/telematics: Diagnosis/troubleshooting

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS/TROUBLESHOOTING (9603 TELEPHONE/TELEMATICS)

Work instruction Display OK If not OK
1 Read out telephone fault memory
  • Connect and start the Porsche System Tester II 9588 and switch on the ignition.
  • Select 911 (996) in the Vehicle type menu and confirm with the "FORWORD" key.
  • Select PCM in the Control units menu and confirm with the "FORWORD" key
  • Select PCM2 in the 911 (996) function selection and confirm with the "FORWORD" key.
  • Select Telephone/telematics in the 911 (996) PCM2 function selection and confirm with the "FORWORD" key.
  • Select Fault memory in the 911 (996) telephone/telematics function selection and confirm with the "FORWORD" key.
  • Read out fault memory
  • Erase fault memory
  • Remove ignition key and switch on ignition again
  • Read out fault memory
-> End Fault code is displayed
Step 2
2 Check wiring harness to the additional receiver
  • Switch off ignition
  • Pull off plug A on the telephone control module
  • Pull off plug A on the additional telephone receiver
  • Measure resistance between plug A on the telephone control module, pin 24 and pin 1 on the plug on the additional telephone receiver
< 0.5
Step 3
Repair wiring harness
-> End
3 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 25, and pin 2 on the plug on the additional telephone receiver
< 0.5
Step 4
Repair wiring harness
-> End
4 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 8, and pin 3 on the plug on the additional telephone receiver
< 0.5
Step 5
Repair wiring harness
-> End
5 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 20, and pin 4 on the plug on the additional telephone receiver
< 0.5
Step 6
Repair wiring harness
-> End
6 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 22 and pin 5 on the plug on the additional telephone receiver
< 0.5
Step 7
Repair wiring harness
-> End
7 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 26, and pin 6 on the plug on the additional telephone receiver
< 0.5
Step 8
Repair wiring harness
-> End
8 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 24, and ground
Step 9 Repair short circuit to ground in the wiring harness
-> End
9 Check wiring harness to the additional receiver
  • Measure resistance between plug A on the telephone control module, pin 25, and ground
Step 10 Repair short circuit to ground in the wiring harness
-> End
10 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 8, on the telephone control module and ground
v
Step 11
Repair short circuit to ground in the wiring harness
-> End
11 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 20, on the telephone control module and ground
Step 12 Repair short circuit to ground in the wiring harness
-> End
12 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 22, on the telephone control module and ground
Step 13 Repair short circuit to ground in the wiring harness
-> End
13 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 26, on the telephone control module and ground
Step 14 Repair short circuit to ground in the wiring harness
-> End
14 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 3, on the telephone control module and ground
Step 15 Repair short circuit to ground in the wiring harness
-> End
15 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 24, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 16
Repair short circuit to B+ in the wiring harness
-> End
16 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 25, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 17
Repair short circuit to B+ in the wiring harness
-> End
17 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 8, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 18
Repair short circuit to B+ in the wiring harness
-> End
18 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 20, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 19
Repair short circuit to B+ in the wiring harness
-> End
19 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 22, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 20
Repair short circuit to B+ in the wiring harness
-> End
20 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 26, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 21
Repair short circuit to B+ in the wiring harness
-> End
21 Check wiring harness to the additional receiver
  • Measure voltage between plug A, pin 3, on the telephone control module and ground
  • Switch ignition on.
0 V
Step 22
Repair short circuit to B+ in the wiring harness
-> End
22 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 24, on the telephone control module and pins 25, 8, 20, 22, 26 and 3
Step 23 Repair short circuit between wires in the wiring harness
-> End
23 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 25, on the telephone control module and pins 8, 20, 22, 26 and 3
Step 24 Repair short circuit between wires in the wiring harness
-> End
24 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 8, on the telephone control module and pins 20, 22, 26 and 3
Step 25 Repair short circuit between wires in the wiring harness
-> End
25 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 20, on the telephone control module and pins 22, 26 and 3
Step 26 Repair short circuit between wires in the wiring harness
-> End
26 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 22, on the telephone control module and pins 26 and 3
Step 27 Repair short circuit between wires in the wiring harness
-> End
27 Check wiring harness to the additional receiver
  • Measure resistance between plug A, pin 26, on the telephone control module and pin 3
Step 28 Repair short circuit between wires in the wiring harness
-> End
28
  • Replace handset
-> End Step 29
29
  • Replace telephone control module
-> End