8001 CDR23: Diagnosis/troubleshooting

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 the 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	< 5 -> End	Check or repair wiring harness -> End