low beam INFINITI QX56 2004 Factory Owner's Manual

LT-28
HEADLAMP (FOR USA)
Revision: August 20072004 QX56
6. CHECK HEADLAMP GROUND
1. Turn ignition switch OFF.
2. Check continuity between front combination lamp RH harness
connector E107 terminal 1 (B) and ground.
3. Check continuity between front combination lamp LH harness
connector E11 terminal 1 (B) and ground.
OK or NG
OK >> Check front combination lamp connector for damage or
poor connection, ballasts (HID control unit) and xenon
bulbs. Repair as necessary.
NG >> Repair harness or connector.
Headlamp LO Does Not Illuminate (One Side)EKS007A4
1. BULB INSPECTION
Inspect ballasts (HID control unit) and xenon bulb of inoperative headlamp bulb.
OK or NG
OK >> GO TO 2.
NG >>

(step1) Replace xenon bulb with other side bulb or new one. (If lamp illuminates correctly,
replace the xenon bulb).

(step2) Replace ballast (HID control unit) with other side ballast or new one. (If lamp illuminates
correctly, replace the ballast).
2. CHECK POWER TO HEADLAMP
1. Disconnect inoperative headlamp connector.
2. Turn the low beam headlamps ON.
3. Check voltage between inoperative headlamp connector termi-
nal and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.1 (B) - Ground : Continuity should exist.
1 (B) - Ground : Continuity should exist.
WKIA1857E
Front combination lamp
(–)Vo ltag e
(Approx.) (+)
ConnectorTe r m i n a l
(wire color)
RH E107 5 (R/Y)
Ground Battery voltage
LH E11 5 (L)
WKIA1855E

HEADLAMP (FOR USA)
LT-29
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
3. CHECK HEADLAMP GROUND
1. Turn the low beam headlamps OFF.
2. Check continuity between inoperative headlamp connector ter-
minal and ground.
OK or NG
OK >> Check headlamp and IPDM E/R connector. Repair as
necessary.
NG >> Repair open circuit in harness between inoperative headlamp and ground.
4. INSPECTION BETWEEN IPDM E/R AND HEADLAMPS
1. Disconnect IPDM E/R connector.
2. Check continuity between harness connector terminals of IPDM
E/R and harness connector terminals of inoperative headlamp.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and
Installation of IPDM E/R" .
NG >> Check for short circuits and open circuits in harness between IPDM E/R and headlamps. Repair
as necessary.
Headlamps Do Not Turn OFFEKS007A5
1. CHECK COMBINATION SWITCH INPUT SIGNAL
Select “BCM” on CONSULT-II. With “HEAD LAMP” data monitor,
make sure “HEAD LAMP SW 1” and “HEAD LAMP SW 2” turns ON-
OFF linked with operation of lighting switch.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-29, "Removal and
Installation of IPDM E/R" .
NG >> GO TO 2.
2. CHECK LIGHTING SWITCH
Check lighting switch. Refer to LT-100, "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Replace lighting switch. Refer to LT-102, "
Removal and Installation" .
Front combination lamp
Continuity
ConnectorTe r m i n a l
(wire color)
RH E107
1 (B) Ground Yes
LH E11
WKIA1857E
IPDM E/R Front combination lamp
Continuity
ConnectorTe r m i n a l
(wire color)ConnectorTe r m i n a l
(wire color)
E12354 (R/Y) RH E107 5 (R/Y)
Ye s
52 (L) LH E11 5 (L)
WKIA1856E
When lighting switch is in
OFF position: HEAD LAMP SW 1 OFF
: HEAD LAMP SW 2 OFF
SKIA5200E

HEADLAMP (FOR USA)
LT-31
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
Aiming AdjustmentEKS007A6
For details, refer to the regulations in your state.
Before performing aiming adjustment, check the following.
1. Ensure all tires are inflated to correct pressure.
2. Place vehicle and screen on level surface.
3. 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.
4. Confirm spare tire, jack and tools are properly stowed.
5. Confirm headlamp aiming switch is set to "0" (zero) position.
LOW BEAM AND HIGH BEAM
NOTE:
Aim each headlamp individually and ensure other headlamp beam pattern is blocked from screen.
1. Turn headlamp low beam on.
2. Use adjusting screw to perform aiming adjustment.
WKIA1859E

LT-32
HEADLAMP (FOR USA)
Revision: August 20072004 QX56
If the vehicle front body has been repaired and/or the headlamp assembly has been replaced, check aiming.
Use the aiming chart shown in the figure.

Basic illuminating area for adjustment should be within the range shown on the aiming chart.
Adjust headlamps accordingly.
Bulb Replacement EKS007A7
HEADLAMP (OUTER SIDE), FOR LOW BEAM
1. Position fender protector aside.
2. Turn headlamp switch OFF.
3. Disconnect battery ground cable.
4. Remove ballast.
5. Disconnect the electrical connector.
6. Release bulb retaining spring and pull bulb straight out.
7. Installation is in the reverse order of removal.
HEADLAMP (INNER SIDE), FOR HIGH BEAM
1. Turn headlamp switch OFF.
2. Disconnect the electrical connector.
3. Turn the bulb counterclockwise to remove it.
4. Installation is in the reverse order of removal.
FRONT PARKING LAMP (INNER OR OUTER)
1. Turn the bulb socket counterclockwise to unlock it.
2. Pull the bulb to remove it from the socket.
3. Installation is in the reverse order of removal.
FRONT SIDE MARKER LAMP
1. Position fender protector aside.
2. Turn the bulb socket counterclockwise to unlock it.
3. Pull the bulb to remove it from the socket.
WKIA3894E

HEADLAMP (FOR USA)
LT-33
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
4. Installation is in the reverse order of removal.
CAUTION:

After installing the bulb, be sure to install the bulb socket securely to ensure watertightness.

Do not touch the glass of bulb directly by hand. Keep grease and other oily substances away from
it. Do not touch bulb by hand while it is lit or right after being turned off. Burning may result.

Do not leave bulb out of headlamp 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 and InstallationEKS007A8
REMOVAL
1. Remove the front bumper. Refer to EI-13, "Removal and Installation" .
2. Disconnect the connector.
3. Remove the 5 headlamp mounting bolts.
INSTALLATION
Installation is in the reverse order of removal.
Disassembly and AssemblyEKS007A9
WKIA1860E
: 6.0 N·m (0.61 kg-m, 53 in-lb)
WKIA1861E
1. Parking lamp bulb (Outer) 2. Parking lamp bulb (Inner) 3. Headlamp bulb (High beam)
4. Headlamp assembly 5. Xenon bulb (Low beam) 6. Side marker lamp bulb
7. Ballast 8. Wiring harness assembly

AUTO LIGHT SYSTEM
LT-59
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56ACTIVE TEST
Operation Procedure
1. Touch “HEAD LAMP” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching “BACK” deactivates the operation.
Display Item List
SELF-DIAGNOSTIC RESULTS
Operation Procedure
1. Touch “BCM” on “SELECT TEST ITEM” screen.
2. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
3. Self-diagnostic results are displayed.
HI BEAM SW “ON/OFF”Displays status (high beam switch: ON/Others: OFF) of high beam switch judged from
lighting switch signal.
HEAD LAMP SW 1 “ON/OFF”Displays status (headlamp switch 1: ON/Others: OFF) of headlamp switch 2 judged from
lighting switch signal.
HEAD LAMP SW 2 “ON/OFF”Displays status (headlamp switch 2: ON/Others: OFF) of headlamp switch 2 judged from
lighting switch signal.
LIGHT SW 1ST “ON/OFF”Displays status (lighting switch 1st position: ON/Others: OFF) of lighting switch judged
from lighting switch signal.
AUTO LIGHT SW “ON/OFF”Displays status of the lighting switch as judged from the lighting switch signal. (AUTO
position: ON/Other than AUTO position: OFF)
PASSING SW “ON/OFF”Displays status (flash-to-pass switch: ON/Others: OFF) of flash-to-pass switch judged
from lighting switch signal.
FR FOG SW “ON/OFF”Displays status (front fog lamp switch: ON/Others: OFF) of front fog lamp switch judged
from lighting switch signal.
DOOR SW-DR “ON/OFF”Displays status of the driver door as judged from the driver door switch signal. (Door is
open: ON/Door is closed: OFF)
DOOR SW-AS “ON/OFF”Displays status of the passenger door as judged from the passenger door switch signal.
(Door is open: ON/Door is closed: OFF)
DOOR SW-RR “ON/OFF”Displays status of the rear door as judged from the rear door switch (RH) signal. (Door is
open: ON/Door is closed: OFF)
DOOR SW-RL “ON/OFF”Displays status of the rear door as judged from the rear door switch (LH) signal. (Door is
open: ON/Door is closed: OFF)
BACK DOOR SW “ON/OFF”Displays status of the back door as judged from the back door latch (door ajar switch) sig-
nal. (Door is open: ON/Door is closed: OFF)
TURN SIGNAL R “ON/OFF” Displays status (Turn right: ON/Others: OFF) as judged from lighting switch signal.
TURN SIGNAL L “ON/OFF” Displays status (Turn left: ON/Others: OFF) as judged from lighting switch signal.
CARGO LAMP SW “ON/OFF” Displays status of cargo lamp.
OPTICAL SENSOR [0 - 5V] Displays “ambient light (close to 5V when dark/close to 0V when light)” judged from opti-
cal sensor signal. Monitor item Contents
Te s t i t e m D e s c r i p t i o n
TAIL LAMP Allows tail lamp relay to operate by switching ON-OFF.
HEAD LAMP Allows headlamp relay (HI, LO) to operate by switching ON-OFF.
FR FOG LAMP Allows fog lamp relay to operate by switching ON-OFF.
CARGO LAMP Allows cargo lamp to operate by switching ON-OFF.

AUTO LIGHT SYSTEM
LT-61
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
4. Select the desired part to be diagnosed on the “SELECT DIAG
MODE” screen.
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE ” screen.
2. Touch “ALL SIGNALS”, “MAIN SIGNALS” or “SELECTION FROM MENU” on the "SELECT MONITOR
ITEM" screen.
3. Touch “START”.
4. Touch the required monitoring item on “SELECTION FROM MENU”. In “ALL SIGNALS”, all items are
monitored. In “MAIN SIGNALS”, predetermined items are monitored.
5. Touch “RECORD” while monitoring to record the status of the item being monitored. To stop recording,
touch “STOP”.
All Items, Main Items, Select Item Menu
NOTE:
Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the dis-
play may not be correct.
ACTIVE TEST
Operation Procedure
1. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
2. Touch item to be tested, and check operation.
3. Touch “START”.
4. Touch “STOP” while testing to stop the operation.
BCIA0031E
ALL SIGNALS All items will be monitored.
MAIN SIGNALS Monitor the predetermined item.
SELECTION FROM MENU Select any item for monitoring.
Item nameCONSULT-II
screen displayDisplay or
unitMonitor item selection
Description
ALL
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
Parking, license plate
and tail lamps requestTAIL&CLR REQ ON/OFF×× ×Signal status input from BCM
Headlamp low beam
requestHL LO REQ ON/OFF×× ×Signal status input from BCM
Headlamp high beam
requestHL HI REQ ON/OFF×× ×Signal status input from BCM
Front fog lamps request FR FOG REQ ON/OFF×× ×Signal status input from BCM
Test item CONSULT-II screen display Description
Tail lamp relay output TAIL LAMPAllows tail lamp relay to operate by switching operation ON-OFF at
your option.

LT-62
AUTO LIGHT SYSTEM
Revision: August 20072004 QX56
Trouble Diagnosis Chart by SymptomEKS007B0
Lighting Switch InspectionEKS007B1
1. CHECK LIGHTING SWITCH INPUT SIGNAL
With CONSULT-II
Select “BCM” on CONSULT-II. With “HEAD LAMP” data monitor,
make sure “AUTO LIGHT SW” turns ON-OFF linked with operation
of lighting switch.
Without CONSULT-II
Refer to LT- 1 0 0 , "
Combination Switch Inspection" .
OK or NG
OK >> Inspection End.
NG >> Check lighting switch. Refer to LT-100, "
Combination
Switch Inspection" .
Headlamp relay (HI, LO) out-
put
LAMPSAllows headlamp relay (HI, LO) to operate by switching operation
(OFF, HI, LO) at your option (Headlamp high beam repeats ON-OFF
every 1 second).
Front fog lamp relay outputAllows fog lamp relay to operate by switching operation ON-OFF at
your option. Test item CONSULT-II screen display Description
Trouble phenomenon Malfunction system and reference

Parking lamps and headlamps will not illuminate when out-
side of the vehicle becomes dark. (Lighting switch 1st posi-
tion and 2nd position operate normally.)

Parking lamps and headlamp will not go out when outside of
the vehicle becomes light. (Lighting switch 1st position and
2nd position operate normally.)

Headlamps go out when outside of the vehicle becomes
light, but parking lamps stay on.

Refer to LT-58, "WORK SUPPORT" .

Refer to LT-62, "Lighting Switch Inspection" .

Refer to LT-63, "Optical Sensor System Inspection" .
If above systems are normal, replace BCM. Refer to BCS-19,
"Removal and Installation of BCM" .
Parking lamps illuminate when outside of the vehicle becomes
dark, but headlamps stay off. (Lighting switch 1st position and
2nd position operate normally.)

Refer to LT-58, "WORK SUPPORT" .

Refer to LT-63, "Optical Sensor System Inspection" .
If above systems are normal, replace BCM. Refer to BCS-19,
"Removal and Installation of BCM" .
Auto light adjustment system will not operate. (Lighting switch
AUTO, 1st position and 2nd position operate normally.)

Refer to LT-63, "Optical Sensor System Inspection" .
If above system is normal, replace BCM. Refer to BCS-19, "
Removal
and Installation of BCM" .
Auto light adjustment system will not operate.

CAN communication line to BCM inspection. Refer to BCS-13,
"CAN Communication Inspection Using CONSULT-II (Self-Diagno-
sis)" .
Shut off delay feature will not operate.

CAN communication line inspection between BCM and combina-
tion meter. Refer to BCS-13, "
CAN Communication Inspection
Using CONSULT-II (Self-Diagnosis)" .

Refer to BL-31, "Door Switch Check" .
If above system is normal, replace BCM. Refer to BCS-19, "
Removal
and Installation of BCM" .
When lighting switch is in
AUTO position: AUTO LIGHT SW ON
SKIA4196E

FRONT FOG LAMP
LT-69
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: August 20072004 QX56
FRONT FOG LAMPPFP:26150
Component Parts and Harness Connector LocationEKS007B4
System DescriptionEKS007B5
Control of the fog lamps is dependent upon the position of the combination switch (lighting switch). The light-
ing switch must be in the 2ND position or AUTO position (LOW beam is ON) for front fog lamp operation.
When the lighting switch is placed in the fog lamp position, the BCM (body control module) receives input sig-
nal requesting the fog lamps to illuminate. When the headlamps are illuminated, this input signal is communi-
cated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication
lines. The CPU (central processing unit) of the IPDM E/R controls the front fog lamp relay coil. When acti-
vated, this relay directs power to the front fog lamps.
OUTLINE
Power is supplied at all times

to ignition relay, located in the IPDM E/R, and

to front fog lamp relay, located in the IPDM E/R, and

through 20A fuse (No. 53, located in the IPDM E/R)

to CPU of the IPDM E/R, and

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.
When the ignition switch is in ON or START position, power is supplied

to ignition relay, located in the IPDM E/R, and

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38.
Ground is supplied

to BCM terminal 67

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59
WKIA3395E

LT-70
FRONT FOG LAMP
Revision: August 20072004 QX56

through grounds E9, E15 and E24.
FOG LAMP OPERATION
The fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position or
AUTO position (LOW beam is ON) and the fog lamp switch must be ON for fog lamp operation.
With the fog lamp switch in the ON position, the CPU of the IPDM E/R grounds the coil side of the fog lamp
relay. The fog lamp relay then directs power

through 20A fuse (No. 56, located in the IPDM E/R)

through IPDM E/R terminal 50

to front turn/fog lamp LH terminal 1, and

through IPDM E/R terminal 51

to front turn/fog lamp RH terminal 1.
Ground is supplied

to front turn/fog lamp LH and RH terminal 3

through grounds E9, E15 and E24.
With power and ground supplied, the front fog lamps illuminate.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), the fog lamp switch is ON, and the
ignition switch is turned from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the fog lamps (and headlamps) remain illuminated for 5 minutes, then the fog lamps (and
headlamps) are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS007B6
Refer to LAN-5, "CAN COMMUNICATION" .