8018 External BOSE amplifier: Diagnosis/troubleshooting

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS/TROUBLESHOOTING (8018 EXTERNAL BOSE AMPLIFIER)

Work instruction			Display OK	If not OK
1	Check wiring harness/rear subwoofer	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/subwoofer	Switch off ignition. Pull off plug A on the amplifier. Check resistance on plug A, pins - and -.	= 5 Step 6	Step 3
3	Check wiring harness to subwoofer	Pull off the plugs on the loudspeakers. Check the resistance in the wire between pin 4 on plug A of the amplifier and pin 1 of the plug for the front right door speaker.	< 5 Step 2	Open circuit in the wire/short circuit to ground. Repair wiring harness -> End
4	Check wiring harness to subwoofer	Check the resistance in the wire between pin 16 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	Replace subwoofer		-> End	Step 6
6	Replace amplifier		-> End