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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Radio, Navigation & Pcm Diagnosis - 911 CARRERA (996) >> 8003 External Harman amplifier >> Diagnosis/troubleshooting for Harman

Diagnosis/troubleshooting for Harman

DIAGNOSIS/TROUBLESHOOTING (8003 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 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 left dashboard loudspeaker
  • Switch off ignition.
  • Pull off plug A on the amplifier.
  • Measure resistance on plug A, pins 5 and 14.
 = 4
5		 Step 3
3 Check wiring harness to left dashboard loudspeaker
  • Pull off the plugs on the loudspeakers.
  • Check the resistance in the wire between pin 5 on plug A of the amplifier and pin 2 of the plug for the front right door speaker.
 < 0.5
Step 4		 Repair circuit in wiring harness
-> End
4 Check wiring harness to left dashboard loudspeaker
  • Pull off the plug on the left dashboard loudspeaker.
  • Check the resistance in the wire between pin 14 on plug A of the amplifier and pin 1 of the plug for the front right door speaker.
 < 0.5
Step 6		 Repair open circuit in wire
-> End
5 Check wiring harness to left dashboard loudspeaker
  • Pull off the plugs on the loudspeakers.
  • Check the resistance in the wire from pin 5 on plug A of the amplifier to pin 14.
 Step 6 Repair short circuit in wiring harness
-> End
6 Check wiring harness to left dashboard loudspeaker
  • Check the resistance in the wire from pin 14 on plug A of the amplifier to ground.
 Step 7 Short circuit to ground. Repair wiring harness
-> End
7 Check wiring harness to left dashboard loudspeaker
  • Check the resistance in the wire from pin 5 on plug A of the amplifier to ground.
 Step 8 Short circuit to ground. Repair wiring harness
-> End
8 Check wiring harness to left dashboard loudspeaker
  • Check the voltage of the wire from pin 5 on plug A of the amplifier to ground.
  • Switch ignition on.
 0 V
Step 9		 Repair short circuit to B+ in the wiring harness
-> End
9 Check wiring harness to left dashboard loudspeaker
  • Check the voltage of the wire from pin 14 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 Check wiring harness and right dashboard loudspeaker
  • Switch off ignition.
  • Pull off plug A on the amplifier.
  • Measure resistance on plug A, pins 6 and 15.
 = 4
13		 Step 11
11 Check wiring harness and right dashboard loudspeaker
  • Pull off the plugs on the loudspeakers.
  • Check the resistance in the wire between pin 6 on plug A of the amplifier and pin 1 of the plug for the front right door speaker.
 < 0.5
Step 12		 Repair open circuit in wiring harness
-> End
12 Check wiring harness and right dashboard loudspeaker
  • Check the resistance in the wire between pin 15 on plug A of the amplifier and pin 2 of the plug for the front right door speaker.
 < 0.5
Step 13		 Repair open circuit in wire
-> End
13 Check wiring harness and right dashboard loudspeaker
  • Check the resistance in the wire from pin 6 on plug A of the amplifier to pin 14.
 Step 14 Repair short circuit in wiring harness
-> End
14 Check wiring harness to right dashboard loudspeaker
  • Check the resistance in the wire from pin 15 on plug A of the amplifier to ground.
 Step 15 Short circuit to ground. Repair wiring harness
-> End
15 Check wiring harness to right dashboard loudspeaker
  • Check the resistance in the wire from pin 6 on plug A of the amplifier to ground.
 Step 16 Short circuit to ground. Repair wiring harness
-> End
16 Check wiring harness to right dashboard loudspeaker
  • Check the voltage of the wire from pin 6 on plug A of the amplifier to ground.
  • Switch ignition on.
 0 V
Step 17		 Repair short circuit to B+ in the wiring harness
-> End
17 Check wiring harness to right dashboard loudspeaker
  • Check the voltage of the wire from pin 15 on plug A of the amplifier to ground.
  • Switch ignition on.
 0 V
Step 18		 Repair short circuit to B+ in the wiring harness -> End
18 Check left dashboard loudspeaker
  • Check resistance on plug A of the loudspeaker, pins 1 and 2.
 = 4
Step 19		 Step 20
19 Check right dashboard loudspeaker
  • Check resistance on plug A of the loudspeaker, pins 1 and 2.
 = 4
Step 22		 Step 21
20 Replace left dashboard loudspeaker -> End Step 19
21 Replace right dashboard loudspeaker -> End Step 11
22 Replace amplifier -> End  
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