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Diagnosis/troubleshooting - BOSE

DIAGNOSIS/TROUBLESHOOTING (8005 EXTERNAL BOSE AMPLIFIER)

Work instruction Display OK If not Ok
1 Check the rear left and right wiring harness and loudspeakers and the right door speaker
  • 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 BOSE amplifier in the 911 (996) PCM2 function selection and confirm with the "FORWORD" key.
  • Select Fault memory in the 911 (996) external BOSE 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 loudspeaker for the right door speaker
  • Switch off ignition.
  • Pull off plug A on the amplifier.
  • Measure resistance on plug A, pins 26 and 31.
 = 4
Step 10		 Step 4
3 Check the rear left and right wiring harness and loudspeakers
  • Switch off ignition.
  • Pull off plug A on the amplifier.
  • Check resistance on plug A, pins 23 and 28.
 = 4
Step 3		 Step 6
4 Check right door speaker wire
  • Pull off the plugs on the loudspeakers.
  • Check the resistance in the wire between pin 26 on plug A of the amplifier and pin 2 of the plug for the front right door speaker.
 < 5
Step 5		 Open circuit in the wire/short circuit to ground. Repair wiring harness
-> End
5 Check right door speaker wire
  • Check the resistance in the wire between pin 31 on plug A of the amplifier and pin 1 of the plug for the front right door speaker.
 < 5
Step 8		 Open circuit in the wire/short circuit to ground. Repair wiring harness
-> End
6 Check the rear left and right loudspeaker wire
  • Check the resistance in the wire between pin 23 on plug A of the amplifier and pin 3 of the plug for the rear left and right loudspeaker.
 < 0.5
Step 7		 Open circuit in the wire/short circuit to ground. Repair wiring harnes
> End
7 Check the rear left and right loudspeaker wire
  • Check the resistance in the wire between pin 28 on plug A of the amplifier and pin 4 of the plug for the rear left and rear right loudspeaker.
 < 0.5
Step 9		 Open circuit in the wire/short circuit to ground. Repair wiring harnes
->End
8 Replace front left loudspeaker -> End Step 10
9 Replace the rear left and right loudspeakers -> End Step 10
10 Replace amplifier -> End  
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