939003618 - J021 HEATED REAR WINDSCREEN NOT WORKING

With the ignition ON, when the button in the control panel for the climate control is pressed, the heated rear windscreen does not heat up properly
If the battery voltage is below 11.6 V, the heated rear windscreen and rear view mirrors are not supplied by the control unit
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION
Check that the rear view mirrors heat up properly when the button in the climate control system control panel is pressedMove on to Step 1The rear view mirrors do not heat up properlyProceed as instructed in the,    See table J022 DOOR MIRROR DEFROSTING NOT WORKING
1HEATED REAR WINDSCREEN POWER SUPPLY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the following, in order:

  • Connection to earth of the heated rear windscreen;
  • Heated rear windscreen power supply line
    See E3020 WINDSCREEN WASH/WIPE 		Move on to Step 2Connection broken.Restore the correct connections
2HEATED REAR WINDSCREEN FILAMENTS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the heated rear windscreen filaments.End of diagnosisFilaments broken.Restore the condition of the heated rear windscreen filaments. Replace the rear windscreen if necessary    Op. 7035B14 REAR WINDOW GLASS - R.R INCLUDES CLEANING HOUSING