L01 CLIMATE CONTROL NOT WORKING / UNDER NO CIRCUMSTANCES - Lancia - Ypsilon - eLearn

2427579 - L01 CLIMATE CONTROL NOT WORKING / UNDER NO CIRCUMSTANCES

When the appropriate on/off button is pressed, the climate control sytem does not work.

The climate control Node supply is protected by special fuses;

0	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Check: the condition of the climate control system supply protective fuses See E6020 AIR CONDITIONING that the climate control system gas pressure is correct	Continue to Step 1	Fuses blown	Change blown fuses
			Relay damaged	Replace relay
			Gas pressure not correct	Eliminate leaks and top up climate control system Op. 5040A10
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment and check for errors: at the climate control node; in the CAN line;	Continue to Step 4	Climate control system node not working.	Continue to Step 2
		Continue to Step 4	CAN line error.	Continue following the instructions for the diagnostic equipment.
2	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check the climate control system node power supply See E6020 AIR CONDITIONING	Continue to Step 3	No power supply	Restore broken electrical connection See E6020 AIR CONDITIONING
3	CHECK ELECTRICAL CONNECTIONS	All OK	Problems met	Operation
	Check the electrical connections for the climate control system node, in particular making sure that each individual pin is correctly connected and inserted in its housing.	Continue to Step 4	Electrical connections not working.	Restore damaged electrical connection.
4	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keep the Examiner connected and check the engine control Node for: no errors in the compressor operating relay. no errors in the climate control system pressure sensor no errors at the fan See Test 5040CD Check on climate control fan' speed control signal Also check the condition of the compressor operating wiring (no short or open circuits)	Continue to Step 5	Relay not working	Change compressor control relay
			Wiring faulty	Renew the wiring
			Error at linear sensor	Continue to Step 5
			Electric fan defective	Replace the fan
			Fan wiring interrupted	Renew the wiring
5	COMPRESSOR ENGAGEMENT CHECK	All OK	Problems met	Operation
	Check: that the compressor is correctly activated by See Test 5040BC Check activation/deactivation of climate control compressor from linear sensor	Continue to Step 6	Compressor will not come on	Check and, if necessary, renew the continuity/insulation for the electrical connection between the engine management control unit and the climate control system pressure sensor See E6021 COMPRESSOR ENGAGEMENT
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Replace the climate control system pressure sensor and check that the fault is no longer present	End of diagnosis