Nissan Pathfinder (2012 year). Manual - part 363

EXL-20

< SYSTEM DESCRIPTION >

PARKING, LICENSE PLATE AND TAIL LAMPS

Component Description

INFOID:0000000007355127

Part name

Description

BCM

• Receives lighting switch requests via BCM combination switch 

reading function.

• Sends parking light request signal to the IPDM E/R.

IPDM E/R

Activates the tail lamp relay upon request of the BCM.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.

August 2012

2012 Pathfinder

COMBINATION SWITCH READING SYSTEM

EXL-21

< SYSTEM DESCRIPTION >

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COMBINATION SWITCH READING SYSTEM

System Diagram

INFOID:0000000007827516

System Description

INFOID:0000000007827517

OUTLINE

• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the

status of each switch.

• BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5) and reads

a maximum of 20 switch states.

COMBINATION SWITCH MATRIX

Combination switch circuit

Combination switch INPUT-OUTPUT system list

AWMIA1237GB

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

OUTPUT 1

—

FR WASHER

FR WIPER LOW

TURN LH

TURN RH

OUTPUT 2

FR WIPER HI

—

FR WIPER INT

PASSING

HEADLAMP 1

OUTPUT 3

INT VOLUME 1

RR WASHER

—

HEADLAMP 2

HI BEAM

AWMIA1238GB

August 2012

2012 Pathfinder

EXL-22

< SYSTEM DESCRIPTION >

COMBINATION SWITCH READING SYSTEM

COMBINATION SWITCH READING FUNCTION

Description

• BCM reads the status of the combination switch at 10 ms intervals normally.

NOTE:

BCM reads the status of the combination switch at 60 ms intervals when BCM is controlled at low power

consumption control mode.

• BCM operates as follows and judges the status of the combination switch.

- It operates the transistor on OUTPUT side in the following order: OUTPUT 1 

→

 2 

→

 3 

→

 4 

→

 5, and outputs

voltage waveform.

- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT

side if any (1 or more) switches are ON.

- It reads this change of the voltage as the status signal of the combination switch.

Operation Example

In the following operation example, the combination of the status signals of the combination switch is replaced

as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.

Example 1: When a switch (TAIL LAMP) is turned ON

OUTPUT 4

RR WIPER INT

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

OUTPUT 5

INT VOLUME 2

RR WIPER ON

—

FR FOG

—

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

JPMIA0609GB

JMMIA0326GB

August 2012

2012 Pathfinder

COMBINATION SWITCH READING SYSTEM

EXL-23

< SYSTEM DESCRIPTION >

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• The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP switch is turned ON.

• BCM detects the combination switch status signal “5D” when the signal of OUTPUT 4 is input to INPUT 5.

• BCM judges that the TAIL LAMP switch is ON when the signal “5D” is detected.

Example 2: When some switches (TURN RH, TAIL LAMP) are turned ON

• The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the

TURN RH switch and TAIL LAMP switch are turned ON.

• BCM detects the combination switch status signal “5AD” when the signals of OUTPUT 1 and OUTPUT 4 are

input to INPUT 5.

• BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal “5AD” is detected.

WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.

AWMIA1239GB

AWMIA1240GB

August 2012

2012 Pathfinder

EXL-24

< SYSTEM DESCRIPTION >

COMBINATION SWITCH READING SYSTEM

Component Parts Location

INFOID:0000000007827518

Wiper intermittent

dial position

Intermittent

operation delay 

interval

INT VOLUME switch ON/OFF status  

INT VOLUME 1

INT VOLUME 2

INT VOLUME 3

1

Short

↑

↓

Long

ON

ON

ON

2

ON

ON

OFF

3

ON

OFF

OFF

4

OFF

OFF

OFF

5

OFF

OFF

ON

6

OFF

ON

ON

7

OFF

ON

OFF

1.

BCM M18, M19, M20 (view with low-
er instrument panel LH removed)

2.

Combination switch (lighting and 
turn signal switch) M28

3.

Combination switch (wiper and 
washer switch) M28

ALMIA0308ZZ

August 2012

2012 Pathfinder

TRAILER TOW

EXL-25

< SYSTEM DESCRIPTION >

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TRAILER TOW

System Diagram

INFOID:0000000007355131

System Description

INFOID:0000000007355132

TRAILER TAIL LAMP OPERATION

The trailer tail lamps are controlled by the trailer tow relay 1 located in the IPDM E/R. With the combination

switch (lighting and turn signal switch) in the 1st position, the BCM detects the LIGHTING SWITCH 1ST POSI-

TION ON. The BCM sends a parking light ON request via the CAN communication lines to the IPDM E/R. The

IPDM E/R then activates the tail lamp relay which activates the trailer tow relay 1 and sends power to the

trailer connector.

TRAILER TURN SIGNAL LAMP OPERATION

The trailer turn signal lamps are controlled by the BCM. When the turn signal switch is in the LH or RH position

with the ignition switch ON, the combination switch (lighting and turn signal switch) sends a signal to the BCM.

The BCM detects the TURN RH or TURN LH ON request. The BCM sends a control signal to the respective

trailer turn relay which sends power to the trailer connector.

TRAILER HAZARD LAMP OPERATION

The trailer hazard lamps are controlled by the BCM. When the hazard switch is pressed, the BCM detects the

the hazard ON request. The BCM then sends a control signal to both trailer turn relays which sends power to

the trailer connector.

TRAILER BRAKE LAMP OPERATION

The trailer brake lamps are controlled by the BCM. When the brake pedal is depressed, the combination meter

receives a stop lamp switch signal from the stop lamp switch. The combination meter then sends the brake

signal to the BCM via the CAN communication lines. The BCM then sends a control signal to both trailer turn

relays which sends power to the trailer connector. 

ABLIA2788GB

August 2012

2012 Pathfinder

EXL-26

< SYSTEM DESCRIPTION >

TRAILER TOW

Component Parts Location

INFOID:0000000007355133

Component Description

INFOID:0000000007355134

1.

Stop lamp switch E38 (view with lower 
instrument panel LH removed)

2.

Brake pedal

3.

BCM, M18, M19, M20 (view with lower 
instrument panel LH removed)

4.

Trailer turn relay LH E163

5.

IPDM E/R E121, E122, E124

6.

Trailer turn relay RH E164

7.

Trailer tow relay 2 E140

8.

Trailer tow relay 1 E148

9.

Combination switch (lighting and turn 
signal switch) M28

10. Combination meter M24

AWLIA1765GB

Part name

Description

BCM

• Receives lighting and turn signal requests from combination 

switch (lighting and turn signal switch).

• Receives stop lamp signal requests from combination meter via 

CAN communication.

• Sends lighting signal request to the IPDM E/R to control the tail 

lamp relay via CAN communication.

• Sends turn/hazard/brake control signal to the trailer turn relays.

IPDM E/R

Activates the tail lamp relay upon request from the BCM via CAN 
communication.

Combination meter

• Receives stop lamp switch signal from stop lamp switch.
• Sends stop lamp signal request to the BCM via CAN communi-

cation.

Combination switch (lighting and turn signal switch)

Outputs lighting and turn signal requests to the BCM.

August 2012

2012 Pathfinder

DIAGNOSIS SYSTEM (BCM)

EXL-27

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (BCM)

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

INFOID:0000000007827519

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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Da

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ve

 T

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W

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Co

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ion

CA

N Diag

 Su

pp

ort Mn

tr

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