8001 CDR23: 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 (8001 CDR23)

Work instruction			Display OK	If not OK
1	Check battery	Examine battery	Step 2	Charge or replace battery -> End
2	Check fuse	Check fuse D8 to radio	Step 3	Replace fuse -> End
3	Check input voltage at pin 30	Switch off ignition Pull off plug A on radio Switch on ignition Measure voltage on plug A of radio between pin 4 and ground	Battery voltage Step 4	Corrosion in the plug connection or contact resistance in the supply lead. Check and repair wiring harness -> End
4	Check ground points	Measure resistance on plug A of radio between pin 8 and ground	< 0.5 -> End	Check or repair wiring harness -> End