1. Engine coolant level too low.

2. Coolant does not circulate correctly: thermostat valve operating incorrectly.

1. Top up to the correct level

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

and check for leaks

2. Carry out the

See table K025 ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING

With the engine on and the compressor off, in manual mode with the temperature knob at the maximum hot HI position.

Also, set the recirculation button to the closed position, the fan speed to 10 bars (display) and the distribution to front ventilation.

Use the diagnostic instrument to check that the engine temperature reaches at least 70 °C.

Check that the air temperature at the front distribution outlet is greater than 60 °C.

With the engine on and the compressor off, in manual mode with the temperature knob at the maximum hot position.

Also, set the recirculation button to the closed position, the fan speed to the 3rd setting and the distribution to front ventilation.

Use the diagnostic instrument to check that the engine temperature reaches at least 70 °C.

Check that the air temperature at the front distribution outlet is greater than 60 °C.

Connect the diagnostic equipment and check:

• that there are no errors at the air mixing actuator;
• that there are no errors at the engine coolant temperature sensor.

1. Short circuit error at the air mixing actuator.

2. Error at the engine coolant temperature sensor.

1. Move on to Step 3

2. Continue as instructed by the diagnostic equipment.

Check whether the electrical wiring connections are loose.

Disconnect and carry out a visual check for damage at the connector contacts/reconnect the connection to the actuator.

Check the continuity/insulation of the electrical connection:

• of the air mixing actuator;
• of the connection on the control unit.

1. Electrical connections loose or damaged.

2. Electrical connection broken or not insulated.

1. Refit the electrical connections correctly.

See E6020 AIR CONDITIONING

2. Restore the continuity/insulation of the electrical connection.

See E6020 AIR CONDITIONING

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

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

See Test 5040DH SEQUENTIAL PROCEDURE FOR CHECKING MIXTURE AND DISTRIBUTION ACTUATOR OPERATION

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 mixer actuator

Op. 5040D56

2. Replace the control unit.

3. Replace the climate control system control unit

Op. 5040D14

1. Incorrect operation of actuator.

2. Physical impediment to the rotation of the flap.

1. Replace the mixer actuator

Op. 5040D56

2. Replace the control unit.

1. Flap travel incomplete.

2. Flap damaged.

3. Kinematic components/gears damaged.

1. Free the air mixer actuator flap from the impediment

2. Replace the flap.

3. Restore kinematic components correctly.