Connect the climate control system to the special repressurizing equipment and check the system pressures

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

Check that the engine cooling fan is working properly.

1. Pressure not correct

2. Incorrect operation of engine cooling fan.

1. Move on to Step 1

2. Carry out

See Test 5040AB REFRIGERANT CIRCUIT CHECK

1. Gas leak from condenser.

2. O-ring seals puckered.

1. Replace the condenser

Op. 5040A40 AIR CONDITIONING CONDENSER - R+R

and refill correctly.

2. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

Mark the point on the condenser from which the gas is escaping.

1. Gas leak from evaporator.

2. O-ring seals puckered.

1. Replace the evaporator

Op. 5040C64 A/C EVAPORATOR - R+R

and refill correctly

2. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

Mark the point where the gas is escaping from the evaporator.

With the engine started and the climate control system at the maximum speed (compressor button ON), place the temperature adjustment button in the LO position, move the probe of the leak detector near the pipe outlet connector and check for any leaks.

If there is a leak, repeat the test to make sure that there really is a leak.

With the engine switched off, move the leak detector probe to the area of the compressor shaft stem and the compressor rear seal.

If there is a leak, repeat the test to make sure that there really is a leak.

1. O-ring seals puckered.

2. Leak from compressor shaft stem.

3. Leak from compressor rear seal.

1. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

2. Replace the compressor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

3. Replace the compressor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

Connect the diagnostic equipment and check:

- that there are no errors at the air mixing actuators;

- that there are no faults in the treated air sensors;

- that there are no faults in the outside temperature sensor;

- that there are no faults in the passenger compartment temperature sensor;

- that there are no errors at the linear sensor.

1. Error in the air mixture actuators.

2. Error in the treated air sensors

3. Error in the outside temperature sensor

4. Error in the passenger compartment temperature sensor.

5. Error in the linear sensor.

1. Move on to Step 5

2. Move on to Step 5

3. Move on to Step 5

4. Move on to Step 5

5. Move on to Step 9

Check the continuity/insulation and visually inspect for any looseness or damage at the electrical connection contacts:

- for the air mixture actuator(s) if there is an error at the mixture actuator;

- for the sensor if there is an error in the outside temperature sensor;

- for the climate control system control unit connector

See E6020 AIR CONDITIONING

1. Electrical connections loose or damaged.

2. Electrical connection broken or not insulated.

1. Renew the electrical connections

See E6020 AIR CONDITIONING

2. Restore the continuity/insulation of the electrical connection

See E6020 AIR CONDITIONING

1. Pipe from compressor to condenser obstructed.

2. Pipe from condenser to expansion valve obstructed.

1. Replace the pipe from the compressor to the condenser

2. Replace the pipe from the condenser to the expansion valve.

Keeping the diagnostic equipment connected, check:

- that there are no errors at the engine management node;

- through active diagnosis, that the compressor engagement relay is working correctly, making sure that, at the same time, the compressor electromagnet coupling is activated.

- that the solar sensor is working properly

1. Errors in Engine Management Node.

2. The relay is activated and the coupling does not come on.

3. The relay comes on and the coupling is not activated.

4. Solar sensor defective.

1. Continue as described by the diagnostic equipment

2. Move on to Step 8

3. Move on to Step 9

4. Replace the solar sensor

Op. 5010D56 SOLAR SENSOR - R.R FOLLOWING ELECTRICAL SYSTEM CHECK

Check the continuity/insulation of the electrical power circuit for the compressor

See E6021 COMPRESSOR ENGAGEMENT

1. Electrical connections broken or not insulated.

2. Electromagnet coupling faulty.

1. Restore the continuity/insulation of the electrical connections

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the compressor complete with coupling

Check that the compressor switches on correctly

See E6021 COMPRESSOR ENGAGEMENT

1. Electrical connections broken

2. Linear sensor does not give OK

1. Check and, if necessary, restore the continuity/insulation of the electrical connection

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the linear sensor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

Check that the compressor switches on correctly

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

1. Electrical connections broken

2. Linear sensor does not give OK

1. Check and, if necessary, restore the continuity/insulation of the electrical connection

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the linear sensor

Op. 5040B20 AIR CONDITIONING LINEAR PRESSURE TRANSDUCER - R.R.

Check that the following errors do not persist:

- at the air mixer actuators (after the self-learning procedure);

- at the outside temperature sensor;

- at the passenger compartment temperature sensor;

- at the treated air sensors.

1. Left air mixture actuator error.

2. Right air mixture actuator error.

3. Outside temperature sensor error.

4. Passenger compartment temperature sensor error.

5. Error at treated air sensors.

1. Move on to Step 12

2. Move on to Step 12

3. Replace the outside temperature sensor

4. Replace the climate control system control unit

Op. 5040D15 FOG LIGHT TRIM - R.R.

5. Replace the treated air sensors.

1. The actuator does not turn.

2. Kinematic components or flaps broken/stuck

1. Replace the mixture actuator

2. Replace the component that is faulty.

Connect the climate control system to the special repressurizing equipment and check the system pressures

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

Check that the engine cooling fan is working properly

1. Pressure not correct

2. Incorrect operation of engine cooling fan

1. Move on to Step 1.

2. Carry out

See Test 5040AB REFRIGERANT CIRCUIT CHECK

1. Gas leak from condenser.

2. O-ring seals puckered.

1. Replace the condenser

Op. 5040A40 AIR CONDITIONING CONDENSER - R+R

and refill correctly.

2. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

Mark the point where the gas is escaping from the condenser.

1. Gas leak from evaporator.

2. O-ring seals puckered.

1. Replace the evaporator

Op. 5040C64 A/C EVAPORATOR - R+R

and refill correctly

2. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

Mark the point where the gas is escaping from the evaporator.

With the engine started and the climate control system at the maximum speed (compressor button ON), place the temperature adjustment knob/button in the maximum cold position, move the probe of the leak detector near to the connector to be analysed and check for any leaks.

If there is a leak, repeat the test to make sure that there really is a leak.

With the engine switched off, move the leak detector probe to the area of the compressor shaft stem and the compressor rear seal.

If there is a leak, repeat the test to make sure that there really is a leak.

1. O-ring seals puckered.

2. Leak from compressor shaft stem.

3. Leak from compressor rear seal.

1. Replace the o-rings and refill correctly

Op. 0010T84 COOLANT FOR AIR CONDITIONING SYSTEM - DEHYDRATE AND REPRESSURIZE

2. Replace the compressor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

3. Replace the compressor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

Keeping the diagnostic equipment connected, check:

- that there are no errors at the engine management node;

- through active diagnosis, that the compressor engagement relay is working correctly, making sure that, at the same time, the compressor electromagnetic coupling is activated.

1. Error at Engine Management Node.

2. The relay comes on and the coupling is not activated.

3. The relay comes on and the coupling is not activated.

1. Proceed as instructed by the diagnostic tester

2. Move on to Step 6

3. Move on to Step 7

Check the continuity/insulation of the electrical circuit for the compressor engagement relay

See E6021 COMPRESSOR ENGAGEMENT

1. Electrical connections broken or not insulated.

2. Compressor engagement relay faulty.

1. Restore the continuity/insulation of the electrical connections

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the compressor engagement relay

Check the continuity/insulation of the electrical power circuit for the compressor

See E6021 COMPRESSOR ENGAGEMENT

1. Electrical connections broken or not insulated.

2. Electromagnetic coupling faulty

1. Restore the continuity/insulation of the electrical connections

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the compressor complete with coupling

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

Check that the compressor switches on correctly

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

1. Electrical connections broken

2. Linear sensor does not give OK

1. Check and, if necessary, restore the continuity/insulation of the electrical connection

See E6021 COMPRESSOR ENGAGEMENT

2. Replace the linear sensor

Op. 5040B20 AIR CONDITIONING LINEAR PRESSURE TRANSDUCER - R.R.

Visually check the correct operation of the mixer actuator for the climate control unit temperature control knob.

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

1. Incorrect operation of actuator

2. Physical impediment to the rotation of the flap.

3. Incorrect operation of actuator from control on climate control system control unit.

1. Replace the mixture actuator

2. Replace the control unit.

3. Replace the climate control system control unit