22 · Diagnostics

Climate control not cooling

Make: Fiat
Model: Idea Factory Service Manual
Year: 2003–2012
Section: Climate control › Climate control not cooling

‹ Prev Fan will not work at different speeds Next › Climate control too cold

Fault diagnosisClimate control not cooling

CLIMATE CONTROL NOT COOLING

The fan works properly and sends air into the interior compartment in accordance with set flow patterns, but this air remains at the external temperature and is not cooled.

Cooling circuit activation enablement is controlled by the climate control and engine management control units. So if the air conditioning does not cool under particular conditions, this is correct.

0	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Connect the climate control system to the repressurizing equipment and check the system pressure See Test 5040B CHECK ON OPERATION OF AIR CONDITIONING SYSTEM (PRESSURES)	Continue to Step 1	Pressure not correct	Eliminate leaks and top up climate control system
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner and check for errors in the climate control system node at the air mixing motors:	Continue to Step 3	Error in air mixing motors	Continue to Step 2
2	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check continuity/insulation of the electrical connection for the air mixing motor(s)	Continue to Step 8	Electrical conection broken or not insulated.	Restore continuity/insulation of electrical connection See E6021 COMPRESSOR ENGAGEMENT
3	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keep the Examiner connected and check: that there are no errors in the engine management node in active diagnostics mode, check compressor activation relay is working properly via active diagnosis. Ensure that the compressor electromagnetic coupling comes on at the same time. the correct operation of the solar sensor See Test 5040DC Check on operation of solar sensor	Continue to Step 6	The relay is not activated and the coupling is not activated.	Continue to Step 4
			The relay is activated but the coupling is not activated.	Continue to Step 5
			Solar sensor defective	Replace the sensor
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check continuity/insulation of compressor activation relay electrical circuit See E6021 COMPRESSOR ENGAGEMENT	Continue to Step 5	Electrical connections broken or not insulated	Restore electrical connection continuity/insulation.
		Continue to Step 5	Compressor engagement relay faulty	Change compressor activation relay
5	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check continuity/insulation of compressor power electrical circuit See E6021 COMPRESSOR ENGAGEMENT	Continue to Step 6	Electrical connections broken or not insulated	Restore electrical connection continuity/insulation.
		Continue to Step 6	Electromagnetic coupling fault.	Replace the compressor complete with coupling Op. 5040A20
6	CHECKING LINKAGE	All OK	Problems met	Operation
	Check air duct opening motor linkage	Continue to Step 7	Linkage incorrectly connected.	Restore correct fastening of linkage to motor
	Check air duct opening motor linkage	Continue to Step 7	Linkage damaged	Replace the linkage.
7	COMPRESSOR ENGAGEMENT CHECK	All OK	Problems met	Operation
	Check correct compressor activation by carrying out the test See Test 5040BC Check activation/deactivation of climate control compressor from linear sensor	Continue to Step 9	The compressor is not activated	Check and, if necessary restore the continuity/insulation of the electrical connection See E6020 AIR CONDITIONING
8	CHECKING CORRECT OPERATION USING TESTER	All OK	Problems met	Operation
	Check that the faults in the iar mixing motors do not persist (after the self-learning procedure)	End of diagnosis	Left air mixer motor faulty	Replace LH air mixer motor. Op. 5040D84
		End of diagnosis	Right air mixing motor error.	Replace RH air mixer motor. Op. 5040D86
9	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Replace the linear sensor and check that the fault is no longer present	End of diagnosis	Fault persists	Continue to Step 10
10	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

‹ Prev Fan will not work at different speeds Next › Climate control too cold

Parts & tools for this job For 2003 Fiat Idea

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