Nissan Titan A60. Manual - part 488

HEADLAMP

EXL-7

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SYSTEM DESCRIPTION

HEADLAMP

System Diagram

INFOID:0000000006178983

System Description

INFOID:0000000006178984

Control of the headlamp system operation is dependent upon the position of the combination switch (lighting

and turn signal switch). When the combination switch (lighting and turn signal switch) is placed in the 2nd posi-

tion, the BCM (body control module) receives input requesting the headlamps and park lamps to illuminate.

This input is communicated to the IPDM E/R (intelligent power distribution module engine room) via the CAN

communication lines. The CPU (central processing unit) of the IPDM E/R controls the headlamp LH high,

headlamp RH high and headlamp low relay coils. When energized, these relays direct power to the respective

headlamps, which then illuminate.

Component Parts Location

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Component Description

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LOW BEAM OPERATION

AWLIA1715GB

1.

BCM M18, M20 (view with instrument 
panel removed)

2.

IPDM E/R E122, E123, E124

3.

Combination switch (lighting and turn-
signal switch) M28

4.

Combination meter M24

ALLIA0379ZZ

EXL-8

< SYSTEM DESCRIPTION >

HEADLAMP

When the combination switch (lighting and turn signal switch) is in 2ND position, the BCM receives input

requesting the headlamps to illuminate. This input is communicated to the IPDM E/R via the CAN communica-

tion lines. The CPU of the IPDM E/R controls the headlamp low relay coil which supplies power to the low

beam headlamps. 

HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION

With the combination switch (lighting and turn signal switch) in the 2ND position and placed in HIGH position,

the BCM receives input requesting the headlamp high beams to illuminate. The flash to pass feature can be

used any time and also sends a signal to the BCM. This input is communicated to the IPDM E/R via the CAN

communication lines. The CPU of the combination meter controls the ON/OFF status off the HIGH BEAM indi-

cator. The CPU of the IPDM E/R controls the headlamp LH high relay coil and RH high relay coil which supply

power to the high beam headlamps.

The combination meter receives a high beam request signal (ON) via the CAN communication lines and turns

the high beam indicator lamp ON.

EXTERIOR LAMP BATTERY SAVER CONTROL

With the combination switch (lighting and turn signal 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-29, "BATTERY SAVER : CONSULT-III Function

(BCM - BATTERY SAVER)"

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AUTO LIGHT SYSTEM

EXL-9

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AUTO LIGHT SYSTEM

System Diagram

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System Description

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

tion switch (lighting and turn signal 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 combination switch (lighting and turn signal 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-27, "HEADLAMP : CONSULT-III Function

(BCM - HEAD LAMP)"

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ABLIA2793GB

EXL-10

< SYSTEM DESCRIPTION >

AUTO LIGHT SYSTEM

Component Parts Location

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Component Description

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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 combination switch (lighting and turn signal switch) position as a part of

the BCM combination switch reading function. When the combination switch (lighting and turn signal 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-27,

"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)"

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1.

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

2.

IPDM E/R E122, E123, E124

3.

Optical sensor M302

4.

Front door switch (crew cab)
LH B8
RH B108

5.

Rear door switch (crew cab)
LH B18
RH B116

6.

Front door switch (king cab)
LH B8
RH B108

7.

Rear door switch upper (king cab)
LH B73
RH B156

8.

Rear door switch lower (king cab)
LH B74
RH B157

9.

Combination switch (lighting and turn 
signal switch) M28

ALLIA0563GB