Infiniti QX56 (JA60). Manual — part 495
DAYTIME LIGHT SYSTEM
EXL-9
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DAYTIME LIGHT SYSTEM
System Diagram
INFOID:0000000005369869
System Description
INFOID:0000000005146609
The headlamp system for Canada vehicles is equipped with a daytime light relay that activates the high beam
headlamps at approximately half illumination whenever the engine is operating. If the parking brake is applied
before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate once the
parking brake is released. Thereafter, the daytime lights will continue to operate when the parking brake is
applied.
Component Parts Location
INFOID:0000000005146610
AWLIA1751GB
AWLIA1626ZZ
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DAYTIME LIGHT SYSTEM
Component Description
INFOID:0000000005369870
After starting the engine with the parking brake released and the combination switch (lighting and turn signal
switch) in the OFF or 1ST position, the headlamp high beam automatically turns on at a reduced intensity.
With the combination switch (lighting and turn signal switch) in the 2nd position or with autolamps ON, the
headlamps function the same as conventional light systems.
OPERATION
The BCM monitors inputs from the parking brake switch and the combination switch (lighting and turn signal
switch) to determine when to activate the daytime light system. The BCM sends a daytime light request to the
IPDM E/R via the CAN communication lines. The IPDM E/R grounds the daytime light relay which in turn, pro-
vides power to the ground side of the LH high beam lamp. Power flows backward through the LH high beam
lamp to the IPDM E/R, through the high beam fuses, through the RH high beam lamp circuit to the RH high
beam lamp and on to ground. The high beam lamps are wired in series which causes them to illuminate at a
reduced intensity.
1.
IPDM E/R E119, E122, E123, E124
2.
BCM M18, M20 (view with instrument
panel removed)
3.
Daytime light relay E103
4.
Combination switch (lighting and turn
signal switch) M28
5.
Combination meter M23, M24
6.
Parking brake switch M11
AUTO LIGHT SYSTEM
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AUTO LIGHT SYSTEM
System Diagram
INFOID:0000000005146612
System Description
INFOID:0000000005146613
• 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 and converts light (lux) to voltage, 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
BCS-22, "HEADLAMP : CONSULT-III Function
AWLIA1752GB
EXL-12
< FUNCTION DIAGNOSIS >
AUTO LIGHT SYSTEM
Component Parts Location
INFOID:0000000005146614
Component Description
INFOID:0000000005146615
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 (lighting and turn signal 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
"HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)"
.
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
LH B8
RH B108
5.
Rear door switch
LH B18
RH B116
6.
Back door latch (door ajar switch)
D503
7.
Combination switch (lighting and turn
signal switch) M28
AWLIA1627ZZ
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