2007 INFINITI QX56 headlamp

HEADLAMP (FOR USA)
LT-21
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
LT
N
O
P
- Place vehicle and screen on level surface.
- Ensure there is no load in vehicle other than the driver (or equivalent weight placed in driver's position).
Coolant and engine oil filled to correct level, and fuel tank full.
- Confirm spare tire, jack and tools are properly stowed.
- Aim each headlamp individually and ensure other headlamp beam pattern is blocked from screen.
- Use adjusting screw to perform aiming adjustment
NOTE:
Basic illuminating area for adjustment should be within the range shown on the aiming chart. Adjust head-
lamps accordingly.
LOW BEAM AND HIGH BEAM
1. Turn headlamp low beam on.
2. Use adjusting screw to perform aiming adjustment.
Bulb ReplacementINFOID:0000000003533350
CAUTION:
• Disconnect battery negative terminal before touching xenon bulb or headlamp wiring harness
assembly.
• Turn headlamp switch OFF before disconnecting headlamp harness connector.
• Do not touch bulb by hand right after being turned off. Burning may result.
• Do not touch the glass of bulb directly by hand. Keep grease and other oily substances away from it.
• Do not turn xenon bulb ON when xenon bulb is removed from front combination lamp assembly.
• After installing the bulb, be sure to install the bulb socket securely to ensure watertightness.
A. Right B. Left C. Center of headlamp bulb (H-V point)
D. Cutoff line E. Screen F. Aim evaluation segment
G. Step H. Horizontal center line of headlamp J. 103 mm (4.06 in.)
K. 37 mm (1.46 in.) L. 7.62 m (25 ft.) M. 399 mm (15.71 in.)
N. 133 mm (5.24 in.) P. 53.2 mm (2.09 in.) Q. 466 mm (18.35 in.)
R. 200 mm (7.87 in.) S. RH headlamp aiming screen T. LH headlamp aiming screen
LKIA0809E

LT-22
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
• Do not leave bulb out of front combination lamp assembly for a long time because dust, moisture,
smoke, etc. may affect the performance of the lamp. When replacing bulb, be sure to replace it with a
new one.
HEADLAMP (OUTER SIDE), FOR LOW BEAM
Removal
1. Position fender protector aside.
2. Turn headlamp switch OFF.
3. Disconnect battery negative terminal.
4. Remove ballast.
5. Disconnect headlamp electrical connector.
6. Release bulb retaining spring and pull bulb straight out.
Installation
Installation is in the reverse order of removal.
HEADLAMP (INNER SIDE), FOR HIGH BEAM
Removal
1. Turn headlamp switch OFF.
2. Disconnect headlamp electrical connector.
3. Turn the bulb counterclockwise to remove it.
Installation
Installation is in the reverse order of removal.
FRONT PARKING LAMP (INNER OR OUTER)
Removal
1. Turn the bulb socket counterclockwise to unlock it.
2. Pull the bulb to remove it from the socket.
Installation
Installation is in the reverse order of removal.
SIDE MARKER LAMP (FRONT)
Removal
1. Position fender protector aside.
2. Turn the side marker lamp (front) bulb socket counterclockwise and remove side marker lamp (front) bulb
socket.
3. Pull to remove side marker lamp (front) from the side marker lamp (front) bulb socket.
Installation
Installation is in the reverse order of removal.
Removal and InstallationINFOID:0000000003533351
FRONT COMBINATION LAMP ASSEMBLY
CAUTION:
• Disconnect battery negative terminal before touching xenon bulb or headlamp wiring harness
assembly.
• Turn headlamp switch OFF before disconnecting headlamp harness connector.
• Do not touch bulb by hand right after being turned off. Burning may result.
• Do not touch the glass of bulb directly by hand. Keep grease and other oily substances away from it.
• Do not turn xenon bulb ON when xenon bulb is removed from front combination lamp assembly.
• After installing the bulb, be sure to install the bulb socket securely to ensure watertightness.
• Do not leave bulb out of front combination lamp assembly for a long time because dust, moisture,
smoke, etc. may affect the performance of the lamp. When replacing bulb, be sure to replace it with a
new one.
Removal

HEADLAMP (FOR USA)
LT-23
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
LT
N
O
P
1. Disconnect battery negative terminal.
2. Disconnect front combination lamp assembly.
3. Remove front fascia. Refer to EI-12
.
4. Remove front combination lamp assembly bolts.
5. Remove front combination lamp assembly.
Installation
Installation is in the reverse order of removal.
Disassembly and AssemblyINFOID:0000000003533352
FRONT COMBINATION LAMP ASSEMBLY
Disassembly
1. Remove ballast.
2. Release xenon bulb retaining spring and remove xenon bulb.
3. Turn high beam bulb counterclockwise to unlock and remove high beam bulb.
4. Turn parking lamp bulb (inner) socket counterclockwise to unlock and remove parking lamp bulb.
5. Turn parking lamp bulb (outer) socket counterclockwise to unlock and remove parking lamp bulb.
6. Turn side marker lamp (front) bulb socket counterclockwise to unlock and remove side marker lamp (front)
bulb.
Assembly
Assembly is in the reverse order of disassembly.
WKIA1860E
1. Parking lamp bulb (outer) 2. Headlamp bulb (high beam) 3. Headlamp assembly
4. Xenon bulb (low beam) 5. Side marker lamp (front) bulb 6. Ballast
7. Wiring harness assembly
BKIA0228E

LT-24
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Component Parts and Harness Connector LocationINFOID:0000000003533353
System DescriptionINFOID:0000000003533354
Daytime light system turns on daytime light lamps while driving. Daytime light lamps are not turned on if
engine is activated with parking brake applied. Release parking brake to turn on daytime light lamps. The
WKIA3551E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-25
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
LT
N
O
P
lamps turn off when lighting switch is in the 2ND position or AUTO position (Headlamp is "ON") and when light-
ing switch is in the PASSING position. (Daytime light lamps are not turned off only by parking brake itself.)
A parking brake signal and engine run or stop signal are sent to BCM (body control module) by CAN commu-
nication line.
OUTLINE
Power is supplied at all times
• to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room),
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU (central processing unit) of the IPDM E/R,
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to combination meter terminal 8, and
• through 10A fuse (No. 45, located in the IPDM E/R)
• to daytime light relay terminals 2 and 5.
When the ignition switch is in ON or START position, power is supplied
• to ignition relay, located in the IPDM E/R,
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38, and
• through 10A fuse [No. 14, located in the fuse block (J/B)]
• to combination meter terminal 24.
Ground is supplied
• to BCM terminal 67 and
• to combination meter terminal 17
• through grounds M57, M61 and M79.
DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, the IPDM
E/R receives input requesting the daytime lights illuminate. This input is communicated across the CAN com-
munication lines. The CPU of the IPDM E/R controls the daytime light relay coil. When energized, this relay
directs power
• through daytime light relay terminal 3
• to front combination lamp LH terminal 2
• through front combination lamp LH terminal 6
• to IPDM E/R terminal 55
• through 10A fuse (No. 35, located in the IPDM E/R)
• through 10A fuse (No. 34, located in the IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 6.
Ground is supplied
• to front combination lamp RH terminal 2
• through grounds E9, E15 and E24.
With power and ground supplied, the daytime lights illuminate. The high beam headlamps are now wired in
series and illuminate at a reduced intensity.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "System Description" .
AUTO LIGHT OPERATION
Refer to LT-34, "System Description" .
CAN Communication System DescriptionINFOID:0000000003533355
Refer to LAN-4, "CAN Communication System" .

LT-26
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Schematic
INFOID:0000000003533356
WKWA3641E

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-27
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
L
MA
B
LT
N
O
P
Wiring Diagram - DTRL -INFOID:0000000003533357
WKWA5142E

LT-28
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
WKWA3643E