2004 INFINITI QX56 headlamp

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INFINITI QX56 2004 Factory Service Manual HEADLAMP (FOR USA)
LT-7
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
to combination meter terminal 8, and
through 50A fusible link (letter f , located in the fuse and fusible link box)

HEADLAMP (FOR USA)
LT-7
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
to combination meter terminal 8, and
through 50A fusible link (letter f , located in the fuse and fusible link box)
to BCM terminal 70.
With the ignition switch in the ON or START position, power is supplied
to ignition relay, located in the IPDM E/R, and
through 10A fuse [No. 14, located in the fuse block (J/B)]
to combination meter terminal 24, and
through 10A fuse (No. 59, located in the fuse and relay box)
to BCM terminal 38.
Ground is supplied
to BCM terminal 67 and
to combination meter terminal 17
through grounds M57, M61 and M79, and
to IPDM E/R terminals 38 and 59
through grounds E9, E15 and E24.
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This
input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R con-
trols the headlamp low relay coil. When energized, this relay directs power
through 15A fuse (No. 41, located in the IPDM E/R)
through IPDM E/R terminal 54
to front combination lamp RH terminal 5, and
through 15A fuse (No. 40, located in the IPDM E/R)
through IPDM E/R terminal 52
to front combination lamp LH terminal 5.
Ground is supplied
to front combination lamp LH and RH terminal 1
through grounds E9, E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input request-
ing the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN com-
munication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator.
The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power
through 10A fuse (No. 34, located in the IPDM E/R)
through IPDM E/R terminal 56
to front combination lamp RH terminal 6, and
through 10A fuse (No. 35, located in the IPDM E/R)
through IPDM E/R terminal 55
to front combination lamp LH terminal 6.
Ground is supplied
to front combination lamp LH and RH terminal 2
through grounds E9, E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
XENON HEADLAMP
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 advantages of the xenon type headlamp.