Fault Code 31, - As of My 2002

Fault Code 31, - As Of MY 2002

Fresh-air blower motor - voltage deviation too small/too large

Diagnostic conditions
- Ignition on
- Blower switched on
- No control module fault stored
- No fault with power supply sensors (5 V) stored

Possible cause of fault
- Fuse C 7 faulty
- Fuse D 6 faulty
- Fault in the lines between relay for fresh-air blower or blower regulator (end setting) and fresh-air blower.
- Relay for fresh-air blower faulty
- Blower regulator (end setting) faulty
- Air-conditioning system regulator faulty

Affected pins
Connector B, pin 10, pin 11, and pin 12

Diagnosis/troubleshooting

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):

Diagnosis/troubleshooting (Part 3):

Diagnosis/troubleshooting (Part 4):

Diagnosis/troubleshooting (Part 5):