Nissan Ariya: System Description

• Component Parts
• System
• Diagnosis System (bcm). Rear Window Defogger

Component Parts

Component Parts Location

	Door mirror (Door mirror defogger)		A/C auto amp. Refer to Component Parts Location. for detailed installation location.		A/C control (Rear window defogger switch)
	Rear window defogger		BCM Refer to Component Parts Location. for detailed installation location.		Condenser
	Rear window defogger relay
	Back side of headlining assembly rear side		Fuse block (J/B)
	Nissan Ariya Vehicle front

Rear Window Defogger

COMPONENT FUNCTION WITHIN SYSTEM

Electricity flows to the heat wire (rear window defogger) contained inside the back door window glass, and the back door window glass is heated to eliminated the fogging.

INDIVIDUAL COMPONENT FUNCTION

Heats the heating wire.

COMPONENT OPERATION

When the rear window defogger switch is turned ON, current flows to the rear window defogger, heating the heat wires.

COMPONENT PARTS LOCATION

Contained inside the back door window glass.

Refer to Component Parts Location.

Door Mirror Defogger

COMPONENT FUNCTION WITHIN SYSTEM

Electricity flows to the heat wire (mirror defogger) contained inside the glass mirror, and the glass mirror is heated to eliminated the fogging.

INDIVIDUAL COMPONENT FUNCTION

Heats the heating wire.

COMPONENT OPERATION

When the rear window defogger switch is turned ON, current flows to the mirror defogger, heating the heat wires.

COMPONENT PARTS LOCATION

Contained inside the glass mirror.

Refer to Component Parts Location.

Rear Window Defogger Relay

COMPONENT FUNCTION WITHIN SYSTEM

This relay activates according to the rear window defogger relay control signal that is controlled by BCM, and activates the defogger system.

INDIVIDUAL COMPONENT FUNCTION

It turns the relay switch ON/OFF and sends a current from the battery to the defogger system.

COMPONENT OPERATION

The rear window defogger relay utilizes a normal open relay.

COMPONENT PARTS LOCATION

The rear window defogger relay is installed to the fuse block (J/B).

Refer to Component Parts Location.

System

System Description

SYSTEM DIAGRAM

OPERATION DESCRIPTION

• Turn rear window defogger switch ON when the READY condition. Then A/C control transmits rear window defogger switch signal to A/C auto amp. via LIN communication line.

• A/C auto amp. transmits rear window defogger request signal to BCM via CAN communication.

• BCM turns rear window defogger relay ON and transmits rear window defogger feedback signal to A/C auto amp. via CAN communication when rear window defogger request signal is received.

• Rear window defogger and door mirror defogger are supplied with power and operate when rear window defogger relay turns ON.

• A/C auto amp. transmit rear window defogger feedback signal to A/C control via LIN communication line when rear window defogger feedback signal is received.

• A/C control turns on the rear window defogger indicator lamp when rear window defogger feedback signal is received.

TIMER FUNCTION

• BCM turns rear window defogger relay ON for approximately 20 minutes when rear window defogger switch turns ON. It makes rear window defogger and door mirror defogger operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns rear window defogger relay OFF. The same reaction also occurs during timer operation, if the power switch is turned OFF.

Circuit Diagram

Diagnosis System (bcm). Rear Window Defogger

CONSULT Function (BCM - REAR DEFOGGER)

ACTIVE TEST

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