3360300 - L10 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
0PRELIMINARY CHECKAll OKProblems metOperation
Connect the climate control system to the repressurizing equipment and check the system pressureContinue to Step 1Pressure 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 air mixing motors;
  • in treated air sensors;
  • in the frost sensor.
Continue to Step 3 Air mixing motor damagedContinue to Step 2
Treated air sensor damaged.Continue to Step 2
Frost sensor damaged.Continue to Step 2
2CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation

Check electrical connection continuity/insulation:

  • of air mixing motors
  • of treated air sensors;
  • of frost sensor.
Continue to Step 8Electrical connection interrupted or not insulated.Restore electrical connection continuity/insulation See   E6021  COMPRESSOR ENGAGEMENT
3CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
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 6The 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
4CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation
Check continuity/insulation of compressor activation relay electrical circuit See   E6021  COMPRESSOR ENGAGEMENT Continue to Step 10Compressor engagement relay faultyRestore electrical connection continuity/insulation.
Compressor engagement relay faultyChange compressor activation relay
5CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation
Check continuity/insulation of compressor power circuit. Check continuity/insulation of compressor activation relay electrical circuit See   E6021  COMPRESSOR ENGAGEMENT Continue to Step 6Electrical connections broken or not insulated. Restore electrical connection continuity/insulation.
Electromagnetic coupling fault.Replace the compressor complete with coupling Op.   5040A20 
6CHECKING LINKAGEAll OKProblems metOperation
Check air duct opening motor linkage.Continue to Step 7Linkage incorrectly connected.Restore correct fastening of linkage to motor
Linkage damagedChange linkage
7COMPRESSOR ENGAGEMENT CHECKAll OKProblems metOperation
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 9Compressor does not activateCheck electrical connection continuity/insulation and repair if necessary. See   E6020  AIR CONDITIONING
8CHECKING CORRECT OPERATION USING A TESTERAll OKProblems metOperation

Check errors do not persist:

  • in air mixing motors;
  • in treated air sensors;
  • in the frost sensor.
End of diagnosisLeft 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
9CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsChange linear sensor
10CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsChange the climate control node Op. 5040D18Search for the fault starting from another symptom'