Work Instruction 9 - 12
Fault Code 30
Fault Code 30
A/C - Signal Implausible
Diagnostic conditions
NOTE: This fault can be determined only during a system test.
- Perform system test
Possible cause of fault
- Fuse D6 faulty
- Fuse C7 faulty
- Refrigerant pressure too low or non-existent
- Line fault between pressure switch, fresh-air blower relay, magnetic clutch relay, DME control module or air-conditioning compressor
- Pressure switch faulty
- Magnetic clutch relay faulty
- Fresh-air blower relay faulty
- Magnetic coupling faulty
- Air-conditioning system regulator faulty
Affected pins
Plug B, pin 16
Diagnosis/troubleshooting