22 · Diagnostics

Climate control not heating

Fault diagnosisClimate control not heating

CLIMATE CONTROL NOT HEATING

The climate control works properly and sends air in accordance with the set flows, but this air does not ensure the required heating.

0	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that the level of the engine coolant is correct.	Continue to Step 3	Engine coolant level insufficient.	Restore correct coolant level checking that there are no leaks in the system.
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment and check for errors: in air mixing motors in treated air sensors	Continue to Step 4	Air mixing motor error.	Continue to Step 2
		Continue to Step 4	Treated air sensor error.	Continue to Step 2
2	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check continuity/insulation of electrical connection: for the air mixing motors if there is an error at the mixing motors; for the treated air sensors if there is an error at the treated air sensor; See E6020 AIR CONDITIONING	Continue to Step 3	Electrical conection broken or not insulated.	Restore electrical connection continuity/insulation. See E6020 AIR CONDITIONING
3	CHECKING CORRECT OPERATION USING TESTER	All OK	Problems met	Operation
	Check for persistent errors: at the air mixing motors (after the self-learning procedure); in treated air sensors	End of diagnosis	Air mixing motor error	Replace the mixed air motor
		End of diagnosis	Air mixing motor error.	Change the treated air sensor
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Change the climate control system node Op. 5040D18

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