Nissan Maxima. Manual - part 609

EXL-178

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

AUTO LIGHT SYSTEM

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, lighting

switch and ignition switch.

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

lamps and headlamps according to CAN communication signals from BCM.

• Optical sensor detects ambient brightness of 800 to 2,500 lux, converts light (lux) to voltage, and 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,

front fog lamps and headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps.

For the details of the setting, refer to 

EXL-191, "HEADLAMP : CONSULT Function (BCM - HEAD LAMP)"

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ABLIA2703GB

AUTO LIGHT SYSTEM

EXL-179

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

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Component Parts Location

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Component Description

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AUTO LIGHT OPERATION

Applicable lamps

• Low beam headlamp

• Parking, license plate and tail lamps

• High beam headlamp (with the lighting switch in HIGH BEAM position)

• Front fog lamp (with the lighting switch in front fog lamp ON position)

When the lighting switch is in AUTO position with the ignition switch in ON position, BCM detects the AUTO

LIGHT (ON) by BCM combination switch (lighting and turn signal switch) reading function. BCM automatically

turns  ON/OFF the applicable lamps according to ambient brightness.

NOTE:

Timing for when lamps turn ON/OFF can be changed by the function setting of CONSULT. Refer to 

EXL-191,

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

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1.

IPDM E/R E17, E18, E200

2.

BCM M16, M17, M18, M19, M21 (view 
with combination meter removed)

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Optical sensor M66

AWLIA1633ZZ

EXL-180

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

FRONT FOG LAMP

FRONT FOG LAMP

System Diagram

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System Description

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• BCM (Body Control Module) controls front fog lamp operation.

• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates front fog lamp according to CAN

communication signals from BCM.

• Combination meter operates front fog lamp indicator according to inputs via the CAN communication lines.

Component Parts Location

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ABLIA2704GB

1.

IPDM E/R E17, E18, E200

2.

BCM M16, M17, M18, M19 (view with 
combination meter removed)

3.

Combination switch (lighting and turn 
signal switch) M28

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FRONT FOG LAMP

EXL-181

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Component Description

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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 through 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.

The combination meter also receives a front fog lamp request ON signal through the CAN communication

lines at which time it turns the front fog indicator ON.