800A CDR23: Diagnosis/troubleshooting
DIAGNOSIS/TROUBLESHOOTING (800A 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 911 (996) in the Vehicle type menu and confirm with the "FORWORD" key.
- Select CDR23 in the Control units menu and confirm with the "FORWORD" key.
- Start Fault memory in the menu using the "FORWORD" key.
- Read out fault memory.
- Erase fault memory.
- Remove ignition key and switch on ignition again.
- Read out fault memory.
|
-> End |
Fault code is still displayed
Step 2 |
| 2 |
Check CAN comfort (high) for open circuit |
- Switch off ignition.
- Pull off plug E on CDR23 control module
- Pull off plug B on the air-conditioning system control module.
- Pull off plug A on the instrument cluster control module.
- Measure specific resistance between pin 1 of plug E on the PCM2 control module and pin 1 of plug B on the air-conditioning 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 PCM2 control module and pin 2 of plug B on the air-conditioning control module.
|
< 5
Step 4 |
Repair open circuit wiring harness
-> End |
| 4 |
|
-> End |