Nissan Pathfinder (2009 year). Manual - part 403

EXL-14

< FUNCTION DIAGNOSIS >

AUTO LIGHT SYSTEM

Combination switch (lighting switch)

The lighting switch outputs lighting requests to the BCM.

Optical sensor

Optical sensor detects ambient brightness and converts light 
(lux) to voltage, then sends the optical sensor signal to BCM.

2009 Pathfinder

FRONT FOG LAMP

EXL-15

< FUNCTION DIAGNOSIS >

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FRONT FOG LAMP

System Diagram

INFOID:0000000003939594

System Description

INFOID:0000000003939595

The front fog lamps are activated with the lighting switch (combination switch).  The lighting switch signal to
the BCM is monitored with the BCM combination switch reading function.  When the fog lamps are turned ON
with the lighting switch, the BCM sends a front fog lamp request signal via CAN communication lines to the
IPDM E/R.  The IPDM E/R grounds the front fog lamp relay coil to activate the front fog lamps.

FRONT FOG LAMP OPERATION

When the lighting switch is in front fog lamp ON position and also in 1ST or 2ND position or AUTO position
(headlamp is ON), the BCM detects FR FOG ON and the HEAD LAMP1, 2 ON or the AUTO LIGHT ON. The
BCM sends a front fog lamp request ON signal via the CAN communication lines to the IPDM E/R. The IPDM
E/R then turns ON the front fog lamp relay sending power to the front fog lamps.

Component Parts Location

INFOID:0000000003939596

JPLIA0004GB

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter M24

WKIA4960E

2009 Pathfinder

EXL-16

< FUNCTION DIAGNOSIS >

FRONT FOG LAMP

Component Description

INFOID:0000000003939597

Part name

Description

BCM

• Receives lighting switch requests via BCM combination switch 

reading function.

• Sends headlamp high/low request signal to the IPDM E/R.

IPDM E/R

Activates the front fog lamp relay upon request from the BCM.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.

2009 Pathfinder

TURN SIGNAL AND HAZARD WARNING LAMPS

EXL-17

< FUNCTION DIAGNOSIS >

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TURN SIGNAL AND HAZARD WARNING LAMPS

System Diagram

INFOID:0000000003939598

System Description

INFOID:0000000003939599

TURN SIGNAL OPERATION

When the turn signal switch is in LH or RH position with the ignition switch in ON position, the BCM detects the
TURN RH or TURN LH ON request. The BCM outputs the flasher signal to the respective turn signal lamp.
The BCM also sends a turn indicator signal ON request via the CAN communication lines to the combination
meter. The combination meter then activates the appropriate turn signal indicator and audible buzzer.

HAZARD LAMP OPERATION

When the hazard switch is in ON position, the BCM detects the hazard switch signal ON. The BCM outputs the
flasher signal (right and left). The BCM sends a hazard indicator signal ON request via the CAN communica-
tion lines to the combination meter. The combination meter then activates the hazard indicator and audible
buzzer.

REMOTE KEYLESS ENTRY OPERATION

The remote keyless entry receiver transmits a hazard request signal to the BCM, then BCM controls hazard
lamps.
Refer to 

SEC-17, "System Description"

.

Component Parts Location

INFOID:0000000003939600

AWLIA0006GB

AWLIA1683ZZ

2009 Pathfinder

EXL-18

< FUNCTION DIAGNOSIS >

TURN SIGNAL AND HAZARD WARNING LAMPS

Component Description

INFOID:0000000003939601

1.

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

2.

Combination switch (lighting and turn 
signal switch) M28

3.

Combination meter M24

4.

Hazard switch M55

Part name

Description

BCM

Controls turn signal and hazard flasher operation.

Combination switch (lighting and turn signal switch)

Lighting and turn signal switch requests are output to the BCM.

Hazard switch

Hazard flasher request signal is output to the BCM.

Combination meter

Outputs turn and hazard indicator as requested by the BCM.

2009 Pathfinder

PARKING, LICENSE PLATE AND TAIL LAMPS

EXL-19

< FUNCTION DIAGNOSIS >

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PARKING, LICENSE PLATE AND TAIL LAMPS

System Diagram

INFOID:0000000003939602

System Description

INFOID:0000000003939603

PARKING, LICENCE PLATE AND TAIL LAMPS OPERATION

When the lighting switch is in 1ST position, BCM detects the LIGHTING SWITCH 1ST POSITION 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 sends power to the parking and instrument illumination circuits. 

EXTERIOR LAMP BATTERY SAVER CONTROL

With the lighting switch (combination switch) in the 2nd position and the ignition switch is turned from ON or
ACC to OFF, the battery saver feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes unless the lighting switch position is
changed.  If the lighting switch position is changed, then the headlamps are turned off. 
This setting can be changed by CONSULT-III. Refer to 

EXL-26, "HEADLAMP : CONSULT-III Function (BCM -

HEAD LAMP)"

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Component Parts Location

INFOID:0000000003939604

ALLIA0622GB

1.

IPDM E/R E121, E122, E123, E124

2.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter M24

WKIA4963E

2009 Pathfinder

EXL-20

< FUNCTION DIAGNOSIS >

PARKING, LICENSE PLATE AND TAIL LAMPS

Component Description

INFOID:0000000003939605

Part name

Description

BCM

• Recieves 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.

2009 Pathfinder

COMBINATION SWITCH READING SYSTEM

EXL-21

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COMBINATION SWITCH READING SYSTEM

System Diagram

INFOID:0000000004422052

System Description

INFOID:0000000004422053

OUTLINE

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

status of each switch.

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

maximum of 20 switch status.

COMBINATION SWITCH MATRIX

LIIA0757E

2009 Pathfinder