Nissan Xterra. Instruction — part 381
EXL-12
< SYSTEM DESCRIPTION >
AUTO LIGHT SYSTEM
AUTO LIGHT SYSTEM
System Diagram
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System Description
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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, refer to
BCS-19, "HEADLAMP : CONSULT Function (BCM - HEAD
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.
When the key is turned OFF and all doors are closed, the auto light system keeps the headlamps ON for 45
seconds.
NOTE:
Timing for when lamps turn ON/OFF can be changed by the CONSULT. Refer to
CONSULT Function (BCM - HEAD LAMP)"
AWLIA1910GB
AUTO LIGHT SYSTEM
EXL-13
< SYSTEM DESCRIPTION >
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Component Parts Location
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Component Description
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1.
IPDM E/R E122, E123, E124
2.
BCM M18, M19, M20 (view with lower
instrument panel LH removed)
3.
Front door switch
LH B8
RH B108
4.
Rear door switch
LH B18
RH B116
5.
Optical sensor M14
6.
Combination switch (lighting and turn
signal switch) M28
AWLIA1689ZZ
Part name
Description
BCM
BCM (Body Control Module) controls auto light operation accord-
ing to signals from optical sensor, lighting switch and ignition
switch.
IPDM E/R
IPDM E/R (Intelligent Power Distribution Module Engine Room)
operates parking, license plate, tail and headlamps according to
CAN communication signals from BCM.
Combination switch (lighting and turn signal 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.
Door switches
Detects door open/closed status and forwards that status to the
BCM.
EXL-14
< SYSTEM DESCRIPTION >
OFF-ROAD LAMPS
OFF-ROAD LAMPS
System Diagram
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System Description
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The off-road lamps are activated with the off-road lamps switch. The off-road lamps switch provides a request
signal to the BCM. The BCM grounds the off-road lamps relay coil to activate the off-road lamps. The high
beam headlamps must be ON and the off-road lamp covers removed in order for the BCM to activate the off-
road lamps relay.
OFF ROAD LAMP OPERATION
When the off-road lamps switch is in the ON position, the lighting switch is in the 2nd position with the high
beams activated and the off-road lamp covers removed, the BCM grounds the off-road lamp relay coil to acti-
vate the off-road lamps. The BCM monitors the off-road lamps switch, the lighting switch position via the com-
bination switch reading function and the off-road lamp covers via the off-road lamp cover sensors. The off-
road lamp cover sensor is a magnetic sensor which monitors for the presence of the off-road lamp covers.
Component Parts Location
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1.
Off-road lamp assembly
LH B527, B528
RH B529, B530
2.
BCM M18, M19, M20 (view with lower
instrument panel LH removed)
3.
Off-road lamps switch M80
4.
Off-road lamps relay M81
AWLIA1699ZZ
OFF-ROAD LAMPS
EXL-15
< SYSTEM DESCRIPTION >
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Component Description
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Part name
Description
BCM
• Receives lighting switch requests via BCM combination switch
reading function.
• Receives off-road lamps request information from the off-road
lamps switch.
• Receives off-road lamp cover installation status from the off-
road lamp cover sensors.
• Grounds the off-road lamps relay to activate the off-road lamps.
Off-road lamps switch
Sends off-road lamps request signal to the BCM.
Combination switch (lighting and turn signal switch)
Monitors lighting switch position.
Off-road lamp cover sensors
Senses whether the off-road lamp covers are installed.
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