8005 CDR23: Diagnosis/troubleshooting
DIAGNOSIS/TROUBLESHOOTING (8005 CDR23)
| Work instruction |
Display OK |
If not OK |
| 1 |
Read out CDR23 fault memory |
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select vehicle type 911 (996) and the CDR23 control module and press the "FORWORD" key.
- Read out and erase CDR23 fault memory.
- Switch off ignition, remove ignition key, switch on ignition again and read out fault memory.
|
The fault is remedied
-> End |
Step 2 |
| 2 |
Check CAN comfort (high) for open circuit |
- Switch ignition off.
- Pull off plug E on CDR23.
- Pull off plug A on the instrument cluster control module.
- Pull off plug B on the air-conditioning system control module.
- Measure specific resistance between pin 1 of plug E on the CDR23 control module and pin 14 of plug A on the instrument cluster control module.
|
< 0.5
Step 3 |
Repair open circuit in wiring harness
-> End |
| 3 |
Check CAN comfort (low) for open circuit |
- Measure specific resistance between pin 2 of plug E on the CDR23 control module and pin 15 of plug A on the instrument cluster control module.
|
< 0.5
Step 4 |
Repair open circuit in wiring harness
-> End |
| 4 |
|
-> End |