Nissan Frontier D40. Manual - part 200

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< FUNCTION DIAGNOSIS >

REAR WINDOW DEFOGGER SYSTEM

FUNCTION DIAGNOSIS

REAR WINDOW DEFOGGER SYSTEM

System Diagram

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System Description

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Operation Description

• When rear window defogger switch is turned ON while ignition switch is ON, the front air control transmits

rear window defogger switch signal to BCM.

• BCM transmits rear window defogger control signal to IPDM E/R via CAN communication when rear window

defogger operates.

• IPDM E/R turns rear window defogger relay and heated mirror relay (if equipped) ON when rear window

defogger switch signal is received.

• Rear window defogger and door mirror defogger (if equipped) are supplied with power and operate when

rear window defogger relay and heated mirror relay (if equipped) turn ON.

• Rear window defogger ON is displayed when signal is received.

Timer function

• BCM turns rear window defogger relay and heated mirror relay (if equipped) ON for approximately 15 min-

utes when rear window defogger switch is turned ON while ignition switch is ON. It makes rear window
defogger and door mirror defogger (if equipped) operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns

rear window defogger relay and heated mirror relay (if equipped) OFF. The same reaction also occurs during
timer operation, if the ignition switch is turned OFF. 

INPUT/OUTPUT SIGNAL CHART

ALLIA0559GB

Switch

Input signal to BCM

BCM function

Actuator

Rear window defogger switch

Defogger switch signal

Rear window defogger & door mirror 

defogger (if equipped) control

Rear window defogger

Door mirror defogger (if 

equipped)

Ignition switch

Ignition signal

REAR WINDOW DEFOGGER SYSTEM

DEF-5

< FUNCTION DIAGNOSIS >

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Component Parts Location

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Component Description

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AWLIA1690ZZ

1.

 BCM M18, M20 (view with lower in-
strument panel LH removed)

2.

 Rear window defogger connector 
B165

3.

Rear window defogger ground con-
nector B210

4.

IPDM E/R E120, E122, E124

5.

Rear window defogger switch  

6.

Door mirror (door mirror defogger) 
LH D4, RH D107

BCM

• Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.

Rear window defogger relay

• Operates the rear window defogger and the door mirror defogger (if equipped) with the control 

signal from BCM.

Rear window defogger switch

• The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.

Rear window defogger

• Heats the heating wire with the power supply from the rear window defogger relay to prevent 

the rear window from fogging up.

Door mirror defogger (if 
equipped)

• Heats the heating wire with the power supply from the heated mirror relay to prevent the door 

mirror from fogging up.

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< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

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APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

REAR WINDOW DEFOGGER

REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)

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DATA MONITOR

Diagnosis mode

Function Description

WORK SUPPORT

Changes the setting for each system function.

SELF-DIAG RESULTS

Displays the diagnosis results judged by BCM. Refer to 

BCS-50, "DTC Index"

.

CAN DIAG SUPPORT MNTR

Monitors the reception status of CAN communication viewed from BCM.

DATA MONITOR

The BCM input/output signals are displayed.

ACTIVE TEST

The signals used to activate each device are forcibly supplied from BCM.

ECU IDENTIFICATION

The BCM part number is displayed.

CONFIGURATION

• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

WORK SUPPORT

DATA MONITOR

ACTIVE TEST

BCM

BCM

×

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

Air conditioner

AIR CONDITONER

×

Combination switch

COMB SW

×

Immobilizer

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Vehicle security system

THEFT ALM

×

×

×

RAP (retained accessory power)

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS (tire pressure monitoring sys-
tem)

AIR PRESSURE MONITOR 

×

×

×

Panic alarm system

PANIC ALARM

×

DIAGNOSIS SYSTEM (BCM)

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< FUNCTION DIAGNOSIS >

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ACTIVE TEST

Monitor Item

[Unit]

Description

IGN ON SW [ON/OFF]

Indicates condition of ignition switch in ON position

ACC ON SW [ON/OFF]

Indicates condition of ignition switch in ACC position

REAR DEF SW [ON/OFF]

Displays “Press (ON)/other (OFF)” status determined with the rear window defogger switch

Test Item

Description

REAR DEFOGGER

This test is able to check rear window defogger operation. Rear window defogger operates 
when "ON" on CONSULT-III screen is touched