Nissan Pathfinder (2012 year). Manual - part 133

REAR WINDOW DEFOGGER SYSTEM

DEF-5

< SYSTEM DESCRIPTION >

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Component Parts Location

INFOID:0000000007355314

Component Description

INFOID:0000000007355315

*:if equipped

ALJIA0229ZZ

1.

BCM M18, M20 (view with instrument 
lower panel LH removed)

2.

Rear window defogger switch M98 
(with auto A/C) or M52 (without auto 
A/C) 

3.

A. Rear window defogger ground 
connector D604
B. Rear window defogger connector 
D651

4.

IPDM E/R (rear window defogger relay, 
heated mirror relay if equipped) E120, 
E122, E124

5.

Door mirror (door mirror defogger) 
LH D4 (w/o ADP), D18 (with ADP) 
RH D107 (w/o ADP), D118 (with 
ADP) (if equipped)

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 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.

Heated mirror relay*

Operates the door mirror defogger with the control signal from IPDM E/R. Controlled simulta-
neously with the rear window defogger relay.

Door mirror defogger*

The heating elements heat up when powered by the heated mirror relay to defog the door mirrors 
or prevent the door mirrors from fogging up.

August 2012

2012 Pathfinder

DEF-6

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

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

INFOID:0000000007808147

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

Direct Diagnostic Mode

Description

Ecu Identification

The BCM part number is displayed.

Self Diagnostic Result

The BCM self diagnostic results are displayed.

Data Monitor

The BCM input/output data is displayed in real time.

Active Test

The BCM activates outputs to test components.

Work support

The settings for BCM functions can be changed.

Configuration

• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

System

Sub System

Direct Diagnostic Mode

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 T

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Co

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rat

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CA

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 Su

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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 CONDITIONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

BCM

BCM

×

×

×

×

×

Immobilizer

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×

Panic alarm system

PANIC ALARM

×

August 2012

2012 Pathfinder

DIAGNOSIS SYSTEM (BCM)

DEF-7

< SYSTEM DESCRIPTION >

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

INFOID:0000000007808148

DATA MONITOR

ACTIVE TEST

Monitor Item [Unit]

Description

IGN ON SW [On/Off]

Indicates condition of ignition switch ON position.

ACC ON SW [On/Off]

Indicates condition of ignition switch ACC position.

REAR DEF SW [On/Off]

Indicates condition of rear window defogger switch.

Test Item

Description

REAR DEFOGGER

This test is able to check rear window defogger operation [Off/On].

August 2012

2012 Pathfinder

DEF-8

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER SWITCH

DTC/CIRCUIT DIAGNOSIS

REAR WINDOW DEFOGGER SWITCH

Description

INFOID:0000000007355318

• The rear window defogger is operated by turning the rear window defogger switch ON.

• Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.

Component Function Check

INFOID:0000000007355319

1.

 CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.
Is the inspection result normal?

YES

>> Rear window defogger switch function is OK.

NO

>> Refer to 

DEF-8, "Diagnosis Procedure A/C and AV Switch Assembly"

 (with auto A/C) or 

DEF-9,

"Diagnosis Procedure Front Air Control"

 (without auto A/C).

Diagnosis Procedure A/C and AV Switch Assembly

INFOID:0000000007355320

Regarding Wiring Diagram information, refer to 

DEF-29, "Wiring Diagram"

.

1.

 CHECK A/C AND AV SWITCH ASSEMBLY (REAR WINDOW DEFOGGER SWITCH) CIRCUIT

Operate the rear window defogger switch.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2

2.

 CHECK HARNESS CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect BCM and A/C and AV switch assembly.

3. Check continuity between BCM harness connector M18 (A) terminal 9 and A/C and AV switch assembly

harness connector M98 (B) terminal 16.

4. Check continuity between BCM harness connector M18 (A) terminal 9 and ground.

Is the inspection result normal?

YES

>> Replace A/C and AV switch assembly. Refer to 

VTL-7, "Removal and Installation"

.

NO

>> Repair or replace harness.

BCM connector

Terminal

A/C and AV switch 

assembly connector

Terminal

Continuity 

M18 (A)

9

M98 (B)

16

Yes

ALLIA0315ZZ

BCM connector

Terminal

Ground

Continuity

M18 (A)

9

No

August 2012

2012 Pathfinder

REAR WINDOW DEFOGGER SWITCH

DEF-9

< DTC/CIRCUIT DIAGNOSIS >

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Diagnosis Procedure Front Air Control

INFOID:0000000007355321

Regarding Wiring Diagram information, refer to 

DEF-29, "Wiring Diagram"

.

1.

 CHECK FRONT AIR CONTROL (REAR WINDOW DEFOGGER SWITCH) CIRCUIT

Operate the rear window defogger switch.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2

2.

 CHECK HARNESS CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect BCM and front air control.

3. Check continuity between BCM harness connector M18 terminal

9 and front air control harness connector M52 terminal 11.

4. Check continuity between BCM harness connector M18 terminal

9 and ground.

Is the inspection result normal?

YES

>> Replace front air control. Refer to 

VTL-7, "Removal and Installation"

NO

>> Repair or replace harness.

BCM connector

Terminal

Front air control    

connector

Terminal

Continuity 

M18

9

M52

11

Yes

BCM connector

Terminal

Ground

Continuity

M18

9

No

LIIA2047E

August 2012

2012 Pathfinder

DEF-10

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER RELAY

REAR WINDOW DEFOGGER RELAY

Description

INFOID:0000000007355322

Power is supplied to the rear window defogger with BCM control.

Component Function Check

INFOID:0000000007355323

1.

 CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

Check that an operation noise of rear window defogger relay (located in IPDM E/R) can be heard when turning

the rear window defogger switch ON.
Is the inspection result normal?

YES

>> Rear window defogger relay power supply circuit is OK.

NO

>> Refer to 

DEF-10, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007355324

Regarding Wiring Diagram information, refer to 

DEF-29, "Wiring Diagram"

.

1.

CHECK FUSES 

Check if any of the following fuses in the IPDM E/R are blown.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2.

 CHECK REAR WINDOW DEFOGGER RELAY

Check rear window defogger relay.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace rear window defogger relay.

3.

 CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

COMPONENT PARTS

AMPERE

FUSE NO.

IPDM E/R

15A

46

IPDM E/R

15A

47

Terminal

Condition

Continuity

Rear window 

defogger relay

3

5

12V direct current supply between termi-
nals 1 and 2.

Yes

No current supply

No

SEF497Y

August 2012

2012 Pathfinder

REAR WINDOW DEFOGGER RELAY

DEF-11

< DTC/CIRCUIT DIAGNOSIS >

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1. Turn ignition switch ON.

2. Check voltage between IPDM E/R connector E124 terminal 60

and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Replace IPDM E/R. Refer to 

PCS-29, "Removal and Installation of IPDM E/R"

.

4.

 CHECK INTERMITTENT INCIDENT

Check intermittent incident.

Refer to 

GI-37, "Intermittent Incident"

Is the inspection result normal?

YES

>> Check the following.

• Battery power supply circuit.

• IPDM E/R.

NO

>> Repair or replace the malfunctioning parts.

Terminals

Condition of rear 

window defogger 

switch

Voltage (V)

(Approx.)

(+)

(–)

IPDM E/R con-

nector

Terminal 

E124

60

Ground

ON Battery 

voltage

OFF

0

LIIA2190E

August 2012

2012 Pathfinder

DEF-12

< DTC/CIRCUIT DIAGNOSIS >

REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT

REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT

Description

INFOID:0000000007355325

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

from fogging up.

Component Function Check

INFOID:0000000007355326

1.

 CHECK REAR WINDOW DEFOGGER

Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch

ON.
Is the inspection result normal?

YES

>> Rear window defogger is OK.

NO

>> Refer to 

DEF-12, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007355327

Regarding Wiring Diagram information, refer to 

DEF-29, "Wiring Diagram"

.

1.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch ON.

2. Press the rear window defogger switch.

3. Check voltage between rear window defogger harness connec-

tor D651 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> GO TO 3

2.

 CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect rear window defogger.

3. Check continuity between rear window defogger harness con-

nector D604 terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace harness.

3.

 CHECK HARNESS CONTINUITY

Terminals

Condition of rear 

window

 defogger switch

Voltage (V)

(Approx.)

(+)

(–)

Rear window 

defogger 

connector

Terminal 

D651

1

Ground

ON

Battery voltage

OFF

0

ALLIA0177ZZ

Rear window defogger connector

Terminal

Ground

Continuity 

D604

2

Yes

ALLIA0178ZZ

August 2012

2012 Pathfinder