Nissan Pathfinder (2008 year). Manual - part 389

AUTO LIGHT SYSTEM

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AUTO LIGHT SYSTEM

System Diagram

INFOID:0000000001712353

System Description

INFOID:0000000001712354

• BCM (Body Control Module) controls auto light operation according to signals from optical sensor, lighting

switch and ignition switch.

• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate, tail and

headlamps according to CAN communication signals from BCM.

• Optical sensor detects ambient brightness of 800 to 2,500 lux. And optical sensor converts light (lux) to volt-

age, then sends the optical sensor signal to BCM.

OUTLINE

The auto light control system has an optical sensor that detects outside brightness.
When the lighting switch is in AUTO position, it automatically turns ON/OFF the parking, license plate, tail and
headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the
setting, Refer to 

EXL-21, "EXTERNAL LAMP : CONSULT-III Function"

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ALLIA0381ZZ

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AUTO LIGHT SYSTEM

Component Parts Location

INFOID:0000000001712355

Component Description

INFOID:0000000001712356

AUTO LIGHT OPERATION

The auto light system operates the low beam and high beam headlamps, parking lamps, tail lamps and license
plate lamps. The BCM monitors the lighting switch (combination switch) position as a part of the BCM combi-
nation switch reading function.  When the lighting switch is in the AUTO position, the BCM automatically turns
the lamps ON/OFF according to ambient light brightness.   
NOTE:
Timing for when lamps turn ON/OFF can be changed by the function setting of CONSULT-III. Refer to 

EXL-21,

"EXTERNAL LAMP : CONSULT-III Function"

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COMBINATION SWITCH READING FUNCTION

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M19,  M20 (view with instru-
ment panel removed)

3.

Combination switch M28

4.

Combination meter M24

5.

Rear door switch
LH B18
RH B116

6.

Optical sensor M145

7.

Back door cinching latch unit (door ajar 
switch) D502

Front door switch
LH B8
RH B108

WKIA4959E

AUTO LIGHT SYSTEM

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Refer to 

BCS-7, "System Description"

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PARKING, LICENSE PLATE AND TAIL LAMPS OPERATION

Refer to 

EXL-17, "System Description"

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FRONT FOG LAMP

FRONT FOG LAMP

System Diagram

INFOID:0000000001712357

System Description

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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.

Component Parts Location

INFOID:0000000001712359

Component Description

INFOID:0000000001712360

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.

COMBINATION SWITCH READING FUNCTION

Refer to 

BCS-7, "System Description"

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JPLIA0004GB

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M20 (view with instrument 
panel removed)

3.

Combination switch M28

4.

Combination meter M24

WKIA4960E

TURN SIGNAL AND HAZARD WARNING LAMPS

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TURN SIGNAL AND HAZARD WARNING LAMPS

System Diagram

INFOID:0000000001712361

System Description

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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"

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COMBINATION SWITCH READING FUNCTION

Refer to 

BCS-7, "System Description"

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AWLIA0006GB

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TURN SIGNAL AND HAZARD WARNING LAMPS

Component Parts Location

INFOID:0000000001712363

Component Description

INFOID:0000000001712364

1.

BCM  M18, M20 (view with instrument 
panel removed)

2.

Combination switch M28

3.

Combination meter M24

4.

Hazard switch M55

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Part name

Description

BCM

Controls turn signal and hazard flasher operation.

Combination 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.

PARKING, LICENSE PLATE AND TAIL LAMPS

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PARKING, LICENSE PLATE AND TAIL LAMPS

System Diagram

INFOID:0000000001712365

System Description

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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-21, "EXTERNAL LAMP : CONSULT-III Function"

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COMBINATION SWITCH READING FUNCTION

Refer to 

BCS-7, "System Description"

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Component Parts Location

INFOID:0000000001712367

ALLIA0622GB

1.

IPDM E/R E121, E122, E123, E124

2.

BCM M18, M20 (view with instrument 
panel removed)

3.

Combination switch M28

4.

Combination meter M24

WKIA4963E

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PARKING, LICENSE PLATE AND TAIL LAMPS

Component Description

INFOID:0000000001712368

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 switch)

Outputs lighting requests to the BCM.