Climate control not cooling
- Make
- Fiat
- Model
- Stilo Factory Service Manual
- Year
- 2001–2007
- Section
- Climate control › Climate control not cooling
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.
| Results of the tests | ||||
| 0 | PRELIMINARY CHECK | All OK | Problems met | Operation |
|---|---|---|---|---|
| Connect the climate control system to the repressurizing equipment and check the system pressure | Continue to Step 1 | Pressure not correct | Eliminate any leaks and top up the climate control system. Op. 5040A10 | |
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
Connect an Examiner and check for errors:
| Continue to Step 3 | Air mixing motor damaged | Continue to Step 2 | |
| Treated air sensor damaged. | Continue to Step 2 | |||
| Frost sensor damaged. | Continue to Step 2 | |||
| 2 | CHECKING ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
Check electrical connection continuity/insulation:
| Continue to Step 8 | Electrical connection interrupted or not insulated. | Restore electrical connection continuity/insulation See E6021 COMPRESSOR ENGAGEMENT | |
| 3 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Keep the Examiner connected and check compressor activation relay is working properly via active diagnosis. Ensure that the compressor electromagnetic coupling comes on at the same time. | Continue to Step 6 | The relay is activated but the coupling is not activated. | Continue to Step 4 | |
| The relay is activated but the coupling is not activated. | Continue to Step 5 | |||
| 4 | CHECKING ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| Check continuity/insulation of compressor activation relay electrical circuit See E6021 COMPRESSOR ENGAGEMENT | Continue to Step 10 | Compressor engagement relay faulty | Restore electrical connection continuity/insulation. | |
| Compressor engagement relay faulty | Change compressor activation relay | |||
| 5 | CHECKING ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| Check continuity/insulation of compressor power circuit. Check continuity/insulation of compressor activation relay electrical circuit See E6021 COMPRESSOR ENGAGEMENT | Continue to Step 6 | Electrical connections broken or not insulated. | Restore electrical connection continuity/insulation. | |
| 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 | |
| Linkage damaged | Change linkage | |||
| 7 | COMPRESSOR ENGAGEMENT CHECK | All OK | Problems met | Operation |
| Check correct compressor activation by carrying out test 5040BC See Test 5040BC Check activation/deactivation of climate control compressor from linear sensor | Continue to Step 9 | Compressor does not activate | Check electrical connection continuity/insulation and repair if necessary. See E6020 AIR CONDITIONING | |
| 8 | CHECKING CORRECT OPERATION USING A TESTER | All OK | Problems met | Operation |
Check errors do not persist:
| End of diagnosis | Left air mixing motor damaged. | Replace the mixed air motor Op. 5040D84 | |
| Right air mixing motor damaged. | Replace the mixed air motor Op. 5040D86 | |||
| Treated air sensor damaged. | Change the treated air sensor Op. 5010D28 | |||
| Frost sensor damaged. | Change the frost sensor Op. 5040A22 | |||
| 9 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | The fault persists | Change linear sensor | |
| 10 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | Fault persists | Change the climate control node Op. 5040D18 Search for the fault starting from another symptom' | |
Parts & tools for this job For 2001 Fiat Stilo
- TOOLA/C manifold gauge setSearch: AC manifold gauge set
- TOOLUV leak detection kitSearch: AC UV leak detection kit
- PARTCabin filterSearch: Fiat Stilo 2001 cabin filter
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