Test point

Motor of fresh-air blower

Voltage too low Voltage too high Fault code 31

Diagnosis conditions

No control module fault stored.

Nominal blower voltage > 3 volts. Nominal blower voltage stabilised.

Voltage too low


Voltage too low means that the measured blower voltage lies below the nominal blower voltage.

1. Check the heating activation relay.

Battery positive voltage must be present at terminal 87

2. Unplug connector C from the heating/air-conditioning control.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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