Diagnosis/troubleshooting - BOSE

DIAGNOSIS/TROUBLESHOOTING (8004 EXTERNAL BOSE 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 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 front right loudspeaker	Switch off ignition. Pull off plug A on the amplifier. Measure resistance on plug A, pins 29 and 24.	= 4 Step 3	Open circuit in the wire/short circuit to ground. Repair wiring harness 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.	< 0.5 Step 4	Step 6
4	Check wiring harness for front right loudspeaker	Pull off plug on the loudspeaker. 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.	< 0.5 Step 5	Repair wiring harness -> End
5	Check wiring harness for front right loudspeaker	Pull off plug on the loudspeaker. 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 loudspeaker.	< 0.5 Step 8	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 harness -> 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 harness -> End
8	Replace front right loudspeaker		-> End	Step 10
9	Replace the rear left and right loudspeakers		-> End	Step 10
10	Replace amplifier		-> End