8004 External Harman amplifier: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (8004 EXTERNAL HARMAN AMPLIFIER)

Work instruction			Display OK	If not OK
1	Check the front left wiring harness and loudspeaker and the left 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 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 the front left wiring harness and loudspeaker and the left door speaker	Switch off ignition. Pull off plug A on the amplifier. Check resistance on plug A, pins 27 and 32.	= 5 Step 3	Step 4
3	Check the front left wiring harness and loudspeaker and the left door speaker	Switch off ignition. Pull off plug A on the amplifier. Measure resistance on plug A, pins 25 and 38.	= 4 Step 10	Step 4
4	Check the wiring harness to the front left door speaker and the left door speaker	Pull off the plugs on the loudspeakers. Check the resistance in the wire between pin 32 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 the wiring harness to the front left door speaker and the left door speaker	Check the resistance in the wire between pin 27 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 wiring harness to the front left door speaker and the left door speaker	Check the resistance in the wire between pin 25 on plug A of the amplifier and pin 2 of the plug for the front left door speaker.	< 5 Step 7	Open circuit in the wire/short circuit to ground. Repair wiring harness -> End
7	Check wiring harness to the front left door speaker	Check the resistance in the wire between pin 38 on plug A of the amplifier and pin 1 of the plug for the front left door speaker.	< 5 Step 9	Open circuit in the wire/short circuit to ground. Repair wiring harness -> End
8	Replace front left loudspeaker		-> End	Step 10
9	Replace front left door speaker		-> End	Step 10
10	Replace amplifier		-> End