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8008 External Harman amplifier: 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 (8008 EXTERNAL HARMAN AMPLIFIER)

Work instruction Display OK If not OK
1 Read out external amplifier 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 External Harman amplifier in the 911 (996) PCM2 function selection and confirm with the "FORWORD" key.
  • Select Fault memory in the 911 (996) external Harman amplifier 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.
  • Extract ambient data, press the "FORWORD" key.
 -> End Fault code is still displayed
Step 2
2 Check wiring harness and right door speaker
  • Switch ignition off.
  • Pull off plug A on the amplifier.
  • Check resistance on plug A, pins 8 and 17.
 = 4
Step 7		 Step 3
3 Check wiring harness to right door speaker
  • Pull off the plugs on the right door speakers.
  • Check the resistance in the wire between pin 8 on plug A of the amplifier and pin 2 of the plug for the front right door speaker.
 < 0.5
Step 4		 Repair open circuit in wiring harness
-> End
4 Check wiring harness to right door speaker
  • Pull off the plug on the right door speaker.
  • Check the resistance in the wire between pin 17 on plug A of the amplifier and pin 1 of the plug for the right door speaker.
 < 0.5
Step 5		 Repair open circuit in wiring harness
-> End
5 Check wiring harness to right door speaker
  • Pull off the plug on the door speaker.
  • Check the resistance in the wire from pin 8 on plug A of the amplifier to pin 17.
 Step 6 Repair short circuit in wiring harness
-> End
6 Check wiring harness to right door speaker
  • Check the resistance in the wire from pin 8 on plug A of the amplifier to pin 14.
 Step 9 Repair short circuit to ground in wiring harness
-> End
7 Check wiring harness to right door speaker
  • Check the resistance in the wire from pin 8 on plug A of the amplifier to ground.
 Step 8 Repair short circuit to ground in the wiring harness
-> End
8 Check wiring harness to right door speaker
  • Check the voltage of the wire from pin 8 on plug A of the amplifier to ground.
  • Switch ignition on.
 < 0 V
Step 8		 Repair short circuit to B+ in the wiring harness
-> End
9 Check wiring harness to right door speaker
  • Check the voltage of the wire from pin 17 on plug A of the amplifier to ground.
  • Switch ignition on.
 0 V
Step 10		 Repair short circuit to B+ in the wiring harness
-> End
10 Replace front right door speaker -> End Step 10
11 Replace amplifier -> End  
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