Infiniti QX4 (R50). Manual — part 304
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to headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
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to headlamp LH and RH relays terminal 2 from headlamp battery saver control unit terminals 2 and 8
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through headlamp battery saver control unit terminals 3 and 9, and
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through lighting switch terminal 12.
Then headlamps illuminate again.
AUTO LIGHT OPERATION
NBEL0188S05
When lighting switch is in “AUTO” position, ground is supplied
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to auto light control unit terminal 10
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from lighting switch terminal 42.
When ignition switch is turn to “ON” or “START” position and outside brightness is darker than prescribed level.
Ground is supplied
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to headlamp relay LH and RH terminals 2
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through battery saver control unit
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from auto light control unit terminal 6, and
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to tail lamp relay terminal 1
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through battery saver control unit
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from auto light control unit terminal 7.
Then both headlamp relays and tail lamp relay are energized, headlamps (low or high) and tail lamps are illu-
minate according to switch position.
Auto light operation allows headlamps and tail lamps to go off when
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Ignition switch is turned to “OFF” position or
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Outside brightness is brighter than prescribed level.
NOTE:
The delay time is varies up to maximum of 20 seconds as the outside brightness changes.
For parking, license and tail lamp auto operation, refer to “PARKING, LICENSE AND TAIL LAMPS”.
THEFT WARNING SYSTEM
NBEL0188S06
The theft warning system will flash the low beams if the system is triggered. Refer to “THEFT WARNING
SYSTEM” (EL-296).
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HEADLAMP (FOR USA) — XENON TYPE —
System Description (Cont’d)
EL-33
XENON HEADLAMP
=NBEL0188S07
Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is passed between two tungsten electrodes through a mixture
of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color.
Following are some of the many advantage of the xenon type headlamp.
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The light produced by the headlamps is white color approximating sunlight that is easy on the eyes.
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Light output is nearly double that of halogen headlamps, affording increased area of illumination.
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The light features a high relative spectral distribution at wavelengths to the human eye is most sensitive,
which means that even in the rain, more light is reflected back from the road surface toward the vehicle,
for added visibility.
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Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
SEL571X
HEADLAMP (FOR USA) — XENON TYPE —
System Description (Cont’d)
EL-34
Schematic
NBEL0160
MEL761L
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
HEADLAMP (FOR USA) — XENON TYPE —
Schematic
EL-35
Wiring Diagram — H/LAMP —
NBEL0013
MEL001O
HEADLAMP (FOR USA) — XENON TYPE —
Wiring Diagram — H/LAMP —
EL-36
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