Nissan Maxima. Manual — part 609
EXL-178
< SYSTEM DESCRIPTION >
[HALOGEN TYPE]
AUTO LIGHT SYSTEM
AUTO LIGHT SYSTEM
System Diagram
INFOID:0000000010051029
System Description
INFOID:0000000010051030
• 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)"
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
"HEADLAMP : CONSULT Function (BCM - HEAD LAMP)"
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
INFOID:0000000010051033
System Description
INFOID:0000000010051034
• 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
INFOID:0000000010051035
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
AWLIA1634ZZ
FRONT FOG LAMP
EXL-181
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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.
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