3360260 - J20 REARSCREEN AND DOOR MIRROR DEFROSTING NOT WORKING

When the switch on the control facia is pressed, the heated rear window and door mirror demisters do not work.

The heated rear window and door mirror demist function is operated by the same switch on the control panel. The body computer node receives a demist control and sends a signal, via the B-CAN network, to the door nodes, which manage door mirror demisting. The body computer node manages heated rear window demisting directly.

		Results of the tests
1	CHECKING USING A TESTER	All OK	Problems met	Operation
	Connect an Examiner and check the heated rear window demist control switch status has been correctly downloaded while in parameter mode	Continue to Step 4	No signal from the heated rear window demister control switch.	Continue to Step 2
2	CHECKING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check continuity/insulation of the electrical connection between body computer node and heated rear window demister control switch.	Continue to Step 3	Electrical connection broken or not insulated.	Restore electrical connection continuity/insulation See   E3030  HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING
3	CHECK SWITCH	All OK	Problems met	Operation
	Check the heated rear window demister control switch is working properly	Continue to Step 4	Power supply is correct	Continue to Step 4
			Switch malfunction	Change the heated rear window demister control switch. Op. 5040D18
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Change the body computer node Op. 5505A32Search for the fault starting from another symptom'