Nissan Maxima. Instruction - part 305

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

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The Diagnostic Procedure described is based on open circuit inspection. A short circuit inspection is also

required for the circuit check in the Diagnostic Procedure.
Is malfunctioning part detected?

YES

>> GO TO 8

NO

>> Check voltage of related BCM terminals using CONSULT.

8.

 REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-

ment.

3. Check DTC. If DTC is displayed, erase it.

>> GO TO 9

9.

 FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check

again, and then check that the malfunction has been repaired securely.

When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that

the symptom is not detected.
Does the symptom reappear?

YES (DTC is detected)>>GO TO 7

YES (Symptom remains)>>GO TO 6

NO

>> Inspection End.

DEF-6

< SYSTEM DESCRIPTION >

REAR WINDOW DEFOGGER SYSTEM

SYSTEM DESCRIPTION

REAR WINDOW DEFOGGER SYSTEM

System Diagram

INFOID:0000000010045573

System Description

INFOID:0000000010045574

Operation Description

• When rear window defogger switch is turned ON while ignition switch is ON, the A/C auto amp. (rear window

defogger switch) transmits rear window defogger switch signal to BCM.

• BCM turns rear window defogger relay ON when rear window defogger switch signal is received.

• Rear window defogger and door mirror defogger (with door mirror defogger) are supplied with power and

operate when rear window defogger relay turns ON.

• Rear window defogger ON is displayed when controller (A/C auto amp.) receives signals.

Timer function

• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch

is turned ON while ignition switch is ON. It makes rear window defogger and door mirror defogger (with 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 ignition switch

is turned OFF. 

INPUT/OUTPUT SIGNAL CHART

*: With door mirror defogger

AWLIA2001GB

Switch

Input signal to BCM

BCM function

Actuator

Rear window defogger switch

Defogger switch signal

Rear window defogger and door 

mirror defogger

*

 control

Rear window defogger

Door mirror defogger 

*

Push button ignition switch

Ignition signal

REAR WINDOW DEFOGGER SYSTEM

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< SYSTEM DESCRIPTION >

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Component Parts Location

INFOID:0000000010045575

Component Description

INFOID:0000000010045576

*: 

With heated mirrors

AWLIA2002ZZ

1.

BCM M16, M17, M18, M19 (view with 
instrument panel removed)

2.

A. Fuse block (J/B)
B. Rear window defogger relay J-2

3.

A/C auto amp. (rear window defog-
ger switch) M37

4.

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

5.

A. Rear window defogger B53
B. Condenser B52 (view with rear pil-
lar finisher LH removed)

6.

Rear window defogger B54 (view 
with rear pillar finisher RH removed)

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 with the control signal from 

BCM.

A/C auto amp. (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

*

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

the door mirror from fogging up.

DEF-8

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

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

INFOID:0000000010065030

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

REAR WINDOW DEFOGGER

Direct Diagnostic Mode

Description

Ecu Identification

The BCM part number is displayed.

Self Diagnostic Result

Displays the diagnosis results judged by BCM.

Data Monitor

The BCM input/output signals are displayed.

Active Test

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

Work support

Changes the setting for each system function.

Configuration

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

CAN Diag Support Mntr

Monitors the reception status of CAN communication viewed from BCM.

System

Sub System

Direct Diagnostic Mode

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Door lock

DOOR LOCK

×

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Exterior lamp

HEADLAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

×

Intelligent Key system

INTELLIGENT KEY

×

×

×

Combination switch

COMB SW

×

BCM

BCM

×

×

×

×

×

Immobilizer

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Trunk open

TRUNK

×

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×