Fault Code 31

Fault Code 31

Fresh-Air Blower Motor - voltage too low/too high

Diagnostic Conditions:
- Ignition on
- Blower switched on

NOTE:
- No control module fault stored
- Supply voltage OK.

Possible cause of fault:
- Fuse D6 faulty
- Relay for fresh-air blower faulty
- Blower regulator (end setting) faulty
- Fault in the lines between relay for fresh-air blower or blower regulator (end setting) and blower motor.

Affected Terminals:
Plug B, terminals 10, 11 and 12

Diagnosis/troubleshooting

Work Instruction 1 - 2:

Work Instruction 3 - 7:

Work Instruction 8 - 10: