With the engine started, set the climate control system control unit to the AUTO position, adjust the temperature to 22 °C, place the recirculation at the outside air intake and the distribution to the front position.

Adjust the fan button (+ side), gradually increasing the speed set and then decrease the speed using the button (- side), thereby checking the effect of the air flow rate variation.

Connect the diagnostic equipment and check:

- that there are no errors at the passenger compartment fan;

- that there are no errors linked to the fan (short circuit errors).

1. Error at the passenger compartment fan.

2. Short circuit error.

3. Fan operating module error.

1. Move on to Step 4

2. Move on to Step 3

3. Move on to Step 4

Restore the loose or damaged electrical connections

See E6020 AIR CONDITIONING

Check whether the electrical wiring connections are loose.

Disconnect/reconnect the connection to the engine mounting.

Disconnect the connector and connect to a feeder.

In these conditions the motor should rotate at the maximum speed, indicating that the operating module is not working

1. Electrical connections loose.

2. The fan does not work.

3. The operating module does not work.

1. Renew the correct connections

See E6020 AIR CONDITIONING

2. Replace the fan

Op. 5040C30 AIR CONDITIONING FAN - R.R.

3. Replace the fan operating module

Check for loose electrical wiring connections and disconnect, visually inspecting for any damage to the connector contacts.

Reconnect the connection to the resistor.

Check that the fan is working at the maximum speed: if it only works at the maximum speed, the relay is broken.

Check whether the resistor has blown by checking the electrical continuity

1. Electrical connections loose or damaged.

2. Relay broken.

3. Resistance values faulty.

1. Renew the electrical connections

See E6020 AIR CONDITIONING

2. Replace the ceramic resistor

Op. 5040C48

3. Replace the ceramic resistor

Op. 5040C48

Check whether the electrical wiring connections are loose

See E6020 AIR CONDITIONING

Disconnect, visually inspecting for any damage to the connector contacts.

Reconnect the connection to the engine mounting.

Check that it rotates at all speeds by activating it using the switch.

1. Electrical connections loose or damaged.

2. Fan not working.

1. Renew the electrical connections

See E6020 AIR CONDITIONING

2. Replace the fan

Op. 5040C30 AIR CONDITIONING FAN - R.R.

Check for loose electrical wiring connections and disconnect, visually inspecting for any damage to the connector contacts.

Reconnect the connection to the selector at the climate control system control unit.

Check whether the selector on the control unit is interrupted by checking the electrical continuity

1. Electrical connections loose or damaged.

2. Fan not working.

3. Power supply to the relays not correct.

1. Renew the electrical connections

See E6020 AIR CONDITIONING

2. Replace the speed selector knob

3. Replace the climate control system control unit

Check whether the electrical wiring connections are loose:

Disconnect, visually inspecting for any damage to the connector contacts.

Reconnect the connection to the relay.

Check that the relay is working properly by providing it with a direct 12 V supply.

1. Electrical connections loose or damaged.

2. Maximum speed operating relay not working

1. Renew the electrical connections

See E6020 AIR CONDITIONING

2. Replace the maximum speed operating relay