2398796 - J22 DOOR MIRROR DEFROSTING NOT WORKING

With the ignition on, when the appropriate button in the climate control system control panel is pressed, one or both of the door mirrors do not warm up properly
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the heated rear windscreen is working properlyContinue to Step 1The heated rear windscreen is also not workingSee table   J20 
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the diagnostic equipment (Examiner or other instruments) and check CAN network information for

  • for inactive control units;
  • control unit errors;
  • absence of control unit with error in CAN line
Continue to Step 5Presence of faultsContinue following the instructions for the diagnostic equipment
Driver's/passenger door node not activated Continue to Step 2
2ELECTRICAL EQUIPMENT CHECK (NODE POWER SUPPLY)All OKProblems metOperation
Check the condition of the connection between the junction unit under the dashboard and the door node concernedContinue to Step 3Connections brokenRestore the connections See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING
Fuse blownReplace the fuse after having eliminated the cause of the problem
3CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner Plus or Smart) to the diagnostic socket and check that there are no erros in the Door Node control unit involvedContinue to Step 4Presence of errors in the Door Node control unit involvedContinue according to the instructions for the diagnostic equipment
4DOOR MIRRORS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation
Check that the connection at the door node for the door mirrors is correct See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING Check that the supply for the mirrors is correct: with the ignition ON and the defrosting button activated, the battery voltage should reach the mirror supply cableContinue to Step 5No power supply from the batteryRestore the correct power supply to the relay. If necessary, replace the faulty components (if a fuse is involved, search for the causes of the problem first)
Connections faultyRestore the correct connections. See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault in the left mirror persistsReplace the driver's door node Op.   5505A42  Search for the fault starting from another symptom'
The fault in the right mirror persistsReplace the passenger door node Op.   5505A46  Search for the fault starting from another symptom'
With the ignition on, when the appropriate button in the climate control system control panel is pressed, one or both of the door mirrors do not warm up properly
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the heated rear windscreen is working properlyContinue to Step 1The heated rear windscreen is also not workingSee table   J20 
1DOOR MIRRORS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation
Check that the door mirrors are connected to earth correctly See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING .Check that the supply for the mirrors is correct: with the ignition ON and the defrosting button activated, the battery voltage should reach the mirror supply Continue to Step 2No power supply from the batteryRestore the correct power supply to the relay. If necessary, replace the faulty components (if a fuse is involved, search for the causes of the problem first)
Connections faultyRestore the correct connections. See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING
2RESISTANCE CHECKAll OKProblems metOperation
Check the continuity of the heated rear window demisting heating elementContinue to Step 3Break in the resistance for one mirrorReplace the mirror reflector Op.   7005R35 
3CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'