3360328 - O20 FRONT SEAT HEATING NOT WORKING

When the switch is pressed the seat heating does not work.
Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Connect the Examiner diagnostic equipment and check for the following at the CAN:

  • inactive control units;
  • control unit errors;
  • control units with errors in CAN line.
Continue to Step 2Presence of faults.Continue according to the instructions for the diagnostic equipment.
2CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation

Keep the Examiner diagnostic equipment connected and check for errors:

  • at the seat heating control switch;
  • at the seat heating operating relay.
Continue to Step 4Seat heating control switch error.Continue to Step 8
Seat heating operating relay error.Continue to Step 3
3CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation
Check continuity/insulation of the electrical connection between the seat heating operating relay and the driver's position node/passenger position node See   E3076  ELECTRICALLY-ADJUSTABLE SEATS .Continue to Step 6Electrical connection interrupted or not insulated.Restore electrical connection continuity/insulation See   E3076  ELECTRICALLY-ADJUSTABLE SEATS .
4CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Check that the seat heating motor is working properly using active diagnosis.Continue to Step 8Seat heating motor not working.Continue to Step 5
5CHECKING ELECTRICAL CIRCUITAll OKProblems metOperation
Check continuity/insulation of the electrical connection between the seat heating motor and the driver's position node/passenger position node See   E3076  ELECTRICALLY-ADJUSTABLE SEATS .Continue to Step 7Electrical connection interrupted or not insulated.Restore electrical connection continuity/insulation See   E3076  ELECTRICALLY-ADJUSTABLE SEATS .
6CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the seat heating operating relay.
7CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the seat heating motor.
8CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persists

Replace:

  • if the driver's seat is involved: driver's position node
  • if the front passenger seat is involved: passegner position node