Check:

• the condition of climate control system power supply protective fuses

See E6020 AIR CONDITIONING

• that the climate control system gas pressure is correct by carrying out the

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

• that the operation of the engine cooling fan is correct.

1. Fuses blown

2. Relay damaged

3. Gas pressure not correct

4. Incorrect operation of engine cooling fan.

1. Change the blown fuses

2. Replace the relay

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

4. Carry out the

See Test 5040AB REFRIGERANT CIRCUIT CHECK

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 in CAN line.

1. Move on to Step 3

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 there are no errors:

• at the climate control node;
• at the Engine management control unit.

1. Climate control node not working.

2. The engine management control unit is not working.

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 errors at the outdoor temperature sensor
• that there are no errors at the fan
• that there are no faults at the demisting 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.

1. Relay not working.

2. Error in the linear sensor.

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

4. Error at the outside temperature sensor.

5. Short circuit error at the fan.

6. Fan operating error.

7. Error at the demisting sensor

8. Compressor wiring broken.

9. The snowflake icon does not light up on the display, nor does the LED on the button (but the compressor is on)

1. Replace the relay

2. Carry out the

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

Op. 5010D12 OUTSIDE AIR TEMPERATURE SENSOR ON DOOR MIRROR - R+R FOLLOWING ELECTRICAL CIRCUIT CHECK

5. Check the electrical connections

See E6020 AIR CONDITIONING

6. Move on to Step 6

7. Replace the demisting sensor

Op. 5040B64 SENSOR ON EVAPORATOR FOR A/C ECU - R + R

8. Restore the correct wiring

See E6021 COMPRESSOR ENGAGEMENT

9. Replace the climate control system control unit.

Op. 5040D14 CONTROL UNIT WITH AUTOMATIC AIR CONDITIONING CONTROL PANEL - R.R.

With the engine switched off, remove the control unit from the dashboard mounting

Op. 5040D14

and disconnect the cable connector from the control unit, visually inspecting for any damage at the connector contacts, and reconnect it correctly to check for any false contacts.

1. Electrical connections loose or damaged.

2. The electrical connections are loose.

1. Restore the loose or damaged electrical connections.

See E6020 AIR CONDITIONING

2. Replace the climate control system control unit.

Op. 5040D14

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

Op. 5040C40 AIR CONDITIONING FAN MOTOR SWITCH - R.R.

Check:

• the condition of climate control system power supply protective fuses
• that the climate control system gas pressure is correct

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

1. Fuses blown.

2. Relay damaged.

3. Gas pressure not correct.

1. Change the blown fuses.

2. Replace the relay

3. Eliminate any leaks and top up to the correct level.

1. The compressor engagement LED does not light.

2. The compressor engagement LED comes on, but the compressor does not switch on.

1. Replace the manual air conditioner control unit.

Op. 5040D17 CONTROL UNIT WITH MANUAL AIR CONDITIONER KNOBS AND BUTTONS R R

2. Move on to Step 2.

Connect the Examiner diagnostic equipment and check that there are no errors:

• at the engine management control unit.

Keeping the Examiner 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 linear sensor;
• that there are no faults at the outdoor temperature sensor;
• that there are no faults at the demisting sensor

1. Relay not working.

2. Error at the linear sensor.

3. Error at the outside temperature sensor.

4. Error at the demisting sensor

1. Replace the compressor operating relay

2. Carry out the

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

3. Replace the outside temperature sensor

Op. 5010D12

4. Replace the demisting sensor

Op. 5040B64 SENSOR ON EVAPORATOR FOR A/C ECU - R + R

Check whether the electrical wiring connections are loose: Disconnect/reconnect the connection to the engine mounting.

Check that it turns at all speeds by activating them using the switch. If it does not turn at maximum speed, check the vehicle fuse. If the fault persists, before replacing the part, provide it with a power supply direct from the vehicle battery and check that it rotates at maximum speed.

1. Electrical connections loose.

2. Fan not working.

1. Renew the electrical connections.

2. Replace the fan

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

Check that the fan is working at the maximum speed: if it only works at the maximum speed the resistor should be replaced.

Check whether the resistor thermal fuse is broken by measuring the electrical continuity at the thermal fuse securing points.

Replacement of ceramic resistor

Op. 5040C48 A/C FAN MOTOR RESISTOR - R+R