L12 CLIMATE CONTROL SYSTEM NOT COOLING TO THE DESIRED TEMPERATURE - Lancia - THESIS - eLearn

169793 - L12 CLIMATE CONTROL SYSTEM NOT COOLING TO THE DESIRED TEMPERATURE

The control button activates the passenger compartment fan properly but the temperature of the air is not correct.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check: that there are no faults in the climate control system node parameter plausibility	Move on to Step	1. Presence of faults	1. Continue following the instructions for the diagnostic equipment
			2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
			3. No communication between climate control system control unit	3. Restore connection between the climate control unit and diagnostic connector (Wiring Diagram ) E6020 AIR CONDITIONING
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.4 20 V,2.0 TB,3.0 V6	Keeping the diagnostic equipment (Examiner or other instruments) connected to the diagnostic socket, check: that there are no faults in the engine management node parameter plausibility	Move on to Step	1. Presence of faults	1. Continue following the instructions for the diagnostic equipment
			2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
			3. No dialogue with the engine management control unit	3. Restore the connection between the engine management control unit and the diagnostic connector (Wiring Diagram ) E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.4 JTD 10V	Keeping the diagnostic equipment (Examiner or other instruments) connected to the diagnostic socket, check: that there are no faults in the engine management node parameter plausibility	Move on to Step	1. Presence of faults	1. Continue following the instructions for the diagnostic equipment
			2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
			3. No dialogue with the engine management control unit	3. Restore the connection between the engine management control unit and the diagnostic connector (Wiring Diagram ) E5050 DIESEL ENGINE ELECTRONIC MANAGEMENT
3	AIR TEMPERATURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the temperature of the air at the vents (see Test 5040A) Continue following the instructions in the test 5040A Air conditioning system operational check (temperature)	Move on to Step	Temperature not correct	Move on to Step
4	SYSTEM PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the climate control system to the special repressurizing equipment and check the system pressures. Continue following the instructions in the test 5040B Air conditioning system operational check (pressure)	Move on to Step	1. High and Low pressure values below the correct figures	1. Repressurize the system See in Op. 5040A10 Air conditioning coolant circuit - Drying and Repressurizing
			2. High and Low pressure values above the correct figures	Move on to Step
			3. High and Low pressure values do not alter when the air conditioning is activated.	3. Replace the compressor See in Op. 5040A20 Air conditioning COMPRESSOR - R.R. - Includes fluid level check and top up if necessary
			4. Condenser cooling fan is not activated/deactivated at the correct pressures	Move on to Step
5	CIRCUIT CAHRGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the system charge is not too high.	Move on to Step	System charge too high.	Restore the correct charge See in Op. 5040A10 Air conditioning coolant circuit - Drying and Repressurizing
6	COOLANT CIRCUIT OBSTRUCTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.0 TB,2.4 20 V,2.4 JTD 10V	Check that the pipes and the filter are not obstructed.	Move on to Step	1. Pipe from compressor to condenser obstructed	1. Replace the pipe See in Op. 5040A50 PIPE from compressor to air conditioner condenser - R and R
			2. Pipe from condenser to filter obstructed	2. Replace the pipe See in Op. 5040A52 PIPE from condenser to drier filter - R and R
			3. Pipe from filter to expansion valve obstructed	3. Replace the pipe See in Op. 5040A54 Pipe from drier filter to expansion valve - R.R.
			4. Filter obstructed	4. Replace the filter See in Op. 5040A44 Air conditioner drier filter/accumulator - R and R
6	COOLANT CIRCUIT OBSTRUCTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
3.0 V6	Check that the pipes and the filter are not obstructed.	Move on to Step	1. Pipe from condenser to filter obstructed	1. Replace the pipe See in Op. 5040A52 PIPE from condenser to drier filter - R and R
			2. Pipe from filter to expansion valve obstructed	2. Replace the pipe See in Op. 5040A54 Pipe from drier filter to expansion valve - R.R.
			3. Filter obstructed	3. Replace the filter See in Op. 5040A44 Air conditioner drier filter/accumulator - R and R
7	CONDENSER CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the condenser is not blocked.	Move on to Step	Condenser blocked	Replace the condenser See in Op. 5040A44 Air conditioner drier filter/accumulator - R and R
8	EXPANSION VALVE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the operation of the expansion valve.	Move on to Step	Expansion valve defective	Replace the expansion valve See in Op. 5040B31 Expansion VALVE on evaporator for automatic climate control system - R.R.
9	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists	Replace the climate control system control unit See in Op. 5040D18 Air conditioning CONTROL UNIT - R.R.