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8004 Harman external amplifier: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (8004 HARMAN EXTERNAL AMPLIFIER)

Work instruction Display OK If not OK
1 Checking wiring harness and front left loudspeaker and left door box
  • Connect the Porsche System Tester II 9588 to the diagnostic socket; switch on the ignition and the Porsche System Tester II 9588.
  • Select vehicle type 911 (996) and start the automatic control module search.
  • Select PCM2 in the "Control modules" menu.
  • Select External amplifier in the PCM2 menu.
  • Select Fault memory in the menu and click the ">>" 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 ">>" key.
 -> End Fault code is still displayed.
Step 2
2 Checking wiring harness and front left loudspeaker and left door box
  • Switch off ignition.
  • Pull plug A off the amplifier.
  • Check resistance on plug A pin 27 and pin 32.
 = 5
Step 3		 Step 4
3 Checking wiring harness and front left loudspeaker and left door box
  • Switch off ignition.
  • Pull plug A off the amplifier.
  • Measure resistance on plug A pin 25 and pin 38.
 = 4
Step 10		 Step 4
4 Checking wiring harness to front left door speaker and left door box
  • Pull plugs off loudspeakers.
  • Check resistance of plug A of amplifier pin 32 to plug on front right door speaker pin 2.
 < 5
Step 5		 Open circuit in wiring/short circuit to ground. Repair wiring harness.
-> End
5 Checking wiring harness to front left door speaker and left door box
  • Check resistance of wiring from plug A of amplifier pin 27 to plug on front right door speaker pin 1.
 < 5
Step 8		 Open circuit in wiring/short circuit to ground. Repair wiring harness.
-> End
6 Checking wiring harness to front left door speaker and left door box
  • Check resistance of wiring from plug A of amplifier pin 25 to plug on front left door speaker pin 2.
 < 5
Step 7		 Open circuit in wiring/short circuit to ground. Repair wiring harness.
-> End
7 Checking wiring harness to front left door loudspeaker
  • Check resistance in wiring of plug A of amplifier pin 38 to plug on front left door loudspeaker pin 1.
 < 5
Step 9		 Open circuit in wiring/short circuit to ground. Repair wiring harness.
-> End
8 Replacing front left loudspeaker -> End Step 10
9 Replacing front left door loudspeaker -> End Step 10
10 Replacing amplifier -> End -
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