Workshop Manuals Factory service & repair Fiat
Fiat Stilo Factory Service Manual (2001-2007)22 · Fault diagnosis
22 · Diagnostics

Climate control not working / under no circumstances

Make
Fiat
Model
Stilo Factory Service Manual
Year
2001–2007
Section
Climate control › Climate control not working / under no circumstances
Fault diagnosisClimate control not working / under no circumstances

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 system Node power supply is protected by specific fuses housed in the facia control unit and engine bay control unit, and governed by a relay housed in the engine bay control unit.

Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation

Verify:

  • condition of power supply system fuses and relays See E6020 AIR CONDITIONING.
  • Correct climate control system pressure
Continue to Step 1Fuses blownChange blown fuses
Relays damagedChange relay
Pressure not correctEliminate any leaks and top up the climate control system. Op. 5040A10
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect an Examiner and check for errors:

  • in the climate control system node.;
  • in the CAN line;
  • in the compressor control output
Continue to Step 4Climate control system node not working.Continue to Step 2
CAN line error.Continue following the instructions for the diagnostic equipment.
Compressor control output not working.Change the climate control system Node Op. 5040D18
2CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation
Check the climate control system node power supply See E6020 AIR CONDITIONINGContinue to Step 3No power supplyRestore broken electrical connection See E6020 AIR CONDITIONING
3CHECK ELECTRICAL CONNECTIONSAll OKProblems metOperation
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 4Electrical connections not working.Restore damaged electrical connection.
4CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Keep the Examiner connected and check the engine control Node for errors in the compressor control relay.Continue to Step 5Relay not working.Change compressor control relay
5CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

1.2 16v

1.6 16v

1.8 16v

2.4 20v

Keep the Examiner connected and check the engine control Node in parameter mode for:

  • air conditioner request received;
Continue to Step 6no air conditioner activation request received.Replace engine management control unit Op. 1056B82
1.9 JTD 8v

Keep the Examiner connected and check the engine control Node in parameter mode for:

  • air conditioner request received;
Continue to Step 6no air conditioner activation request received.Replace engine management control unit Op. 1060G80
6COMPRESSOR ENGAGEMENT CHECKAll OKProblems metOperation
Check compressor is properly activated by See Test 5040BC Check activation/deactivation of climate control compressor from linear sensorContinue to Step 7Compressor will not come onCheck electrical connection continuity/insulation and repair if necessary. See E6021 COMPRESSOR ENGAGEMENT
7CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentContinue to Step 8Fault persistsChange linear sensor
8CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'

Parts & tools for this job For 2001 Fiat Stilo

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.