Test results

Check:

- the condition of the climate control supply system protective fuses

- Correct operation of relay

 See E6020 AIR CONDITIONING

- that the climate control system gas pressure is correct (exhaust system condition)

 See Test 5040OB AIR CONDITIONING SYSTEM OPERATION CHECK (PRESSURE)

Move on to Step 1

1. Fuses blown

2. Relay damaged

3. Gas pressure too low (exhaust system)

1. Change the blown fuses

2. Replace the relay

3. Search for and eliminate leaks and top up climate control system to correct level

Check the following conditions: with the ambient temperature at least 5 °C and the outside temperature reading above 5 °C, with the engine started and the compressor on (check that the snowflake symbol in the display lights up), set the control unit to the AUTO position, the temperature to maximum cold LO and the distribution to the front position. Also check that there are no short circuits to earth for the compressor circuit or any errors on the CAN line by connecting the diagnostic equipment. In these conditions, check that the compressor comes on by opening the bonnet and taking a look.

End of diagnosis

1. The snowflake symbol in the display does not light up (but the compressor is on)

2. The LED with the snowflake symbol comes on (but the compressor does not switch on)

3. The outside temperature reading is incorrect

4. Compressor short circuit

5. Errors on CAN line

1. Climate control system control unit replacement

 Op. 5040D15 CONTROL UNIT WITH KNOBS AND BUTTONS FOR DUAL ZONE AIR CONDITIONER - R.R.

2. Move on to Step 2

3. Move on to Step 3

4. Move on to Step 3

5. Move on to Step 4

Keeping the diagnostic equipment connected, check that the errors are not present:

- at the climate control node;

- at the engine management control unit

Move on to Step 3

1. Climate control node not working

2. The engine management control unit does not give the go ahead

1. Move on to Step 4

2. Continue as instructed by the diagnostic equipment

Keeping the diagnostic equipment connected, check the following at the Climate Control Node:

- that there are no errors at the compressor operating relay

- that there are no errors at the climate control system pressure sensor

- that there are no faults in the outside temperature sensor

- the condition of the compressor operating wiring (no short circuits or open circuits).

Keeping the diagnostic equipment connected, enter active diagnosis and check that all the graphic symbols in the display come on following the Autotest procedure

Move on to Step 5

1. Relay not working

2. Error at the linear sensor

3. Error (short circuit or open circuit) at the outside temperature sensor

4. Error in the outside temperature sensor

5. Compressor wiring broken

6. The snowflake symbol in the display does not light (but the compressor is on)

1. Replace the relay.

 See Test 5040BC CHECK ON CLIMATE CONTROL COMPRESSOR ACTIVATION/DEACTIVATION FROM LINEAR SENSOR

3. Restore the correct wiring for the outside temperature sensor

 See E6020 AIR CONDITIONING

4. Replace the outside temperature sensor

5. Restore the connection

 See E6021 COMPRESSOR ENGAGEMENT

6. Replace the climate control system control unit

 Op. 5040D15 CONTROL UNIT WITH KNOBS AND BUTTONS FOR DUAL ZONE AIR CONDITIONER - R.R.

With the engine switched off, remove the control from the dashboard support and disconnect the cables connector from the control unit visually inspecting for any damage at the connector contacts and reconnect it correctly to check for any false contacts

 Op. 5040D15 CONTROL UNIT WITH KNOBS AND BUTTONS FOR DUAL ZONE AIR CONDITIONER - R.R.

Move on to Step 5

1. Electrical connections loose or damaged

2. The electrical connections are not loose

1. Restore the loose or damaged electrical connections

 See E6020 AIR CONDITIONING

2. Replace the climate control system control unit

 Op. 5040D15 CONTROL UNIT WITH KNOBS AND BUTTONS FOR DUAL ZONE AIR CONDITIONER - R.R.

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.

End of diagnosis

There is no change in the air flow rate at the vents

Move on to Step 6

Check whether the electrical wiring connections are loose.

Disconnect/reconnect the connection to the engine mounting.

Disconnect the connector and connect to a feeder (12 V DC).

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

End of diagnosis

1. Electrical connections loose

2. The fan does not work

3. The operating module does not work

1. Restore the correct connections

 See E6020 AIR CONDITIONING

2. Replace the fan

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

3. Replace the fan operating module

 Op. 5040C44 FAN MOTOR ELECTRONIC VARIATOR - R+R

Test results

Check:

- the condition of the climate control supply system protective fuses

 See E6020 AIR CONDITIONING

- that the climate control system gas pressure is correct

 See Test 5040OB AIR CONDITIONING SYSTEM OPERATION CHECK (PRESSURE)

Move on to Step 1

1. Fuses blown

2. Relay damaged

3. Gas pressure not correct

1. Change the blown fuses

2. Replace the relay

3. Search for and eliminate leaks and top up climate control system to correct level

Check the following conditions: ambient temperature at least 5 °C. With the engine started and the compressor on (check that the snowflake symbol lights up), set the temperature to maximum cold and the distribution to the front position. Also check that there are no short circuits to earth for the compressor circuit by connecting the diagnostic equipment. In these conditions, check that the compressor comes on by opening the bonnet and taking a look.

End of diagnosis

1. The snowflake symbol in the display does not light up (but the compressor is on)

2. The LED with the snowflake symbol comes on (but the compressor does not switch on)

3. Compressor short circuit

1. Move on to Step 4

2. Move on to Step 2

3. Move on to Step 3

Connect the diagnostic equipment and check that there are no errors at the Engine Management Control Unit

Move on to Step 3

The engine management control unit does not give the go ahead

Continue as instructed by the diagnostic equipment

Keeping the diagnostic equipment connected, check:

- that there are no errors at the compressor operating relay;

- that there are no errors at the climate control system pressure sensor

Move on to Step 5

1. Relay not working

2. Error at the linear sensor

1. Replace the relay

 See Test 5040BC CHECK ON CLIMATE CONTROL COMPRESSOR ACTIVATION/DEACTIVATION FROM LINEAR SENSOR

With the engine switched off, remove the control from the dashboard support and disconnect the cable connector from the control visually inspecting for any damage at the connector contacts and reconnect it correctly for check for any false contacts

Move on to Step 5

Electrical connections loose or damaged

Restore the electrical connections

 See E6020 AIR CONDITIONING

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.

If it does not turn at the maximum speed, check the maximum fan speed relay. Disconnect the connector for the fan and connect to a feeder (12V DC).

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

Move on to Step 6

1. Electrical connections loose or damaged

2. Fan not working

3. Fan only turns at the maximum speed supplied directly by the vehicle battery

1. Restore the electrical connections

 See E6020 AIR CONDITIONING

2. Replace the fan

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

3. Move on to Step 6

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 resistor is broken (the thermal fuse has blown)

End of diagnosis

1. Electrical connections loose or damaged

2. Switch broken

3. The fan only works at the maximum speed

1. Restore the electrical connections

 See E6020 AIR CONDITIONING

2. Replace the switch

 Op. 5040D10 AIR CONDITIONER CONTROLS SUPPORT - R+R OR REPLACE

3. Replace the ceramic resistor

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