Infiniti QX4. Electrical System (2003 year). Manual — part 3
쐌
When the door switch signal changes from OFF to ON while the exterior lamp battery saver is activated,
the operation discontinued, restarts and lasts for 45 seconds, then the headlamps will be turned off.
쐌
When the one of four door switch signals changes from OFF to ON while the exterior lamp battery saver
is activated, the operation is discontinued, restarts and lasts for 5 minutes, then the headlamps will be
turned off.
쐌
When all the door switch ON signals are input while the exterior lamp battery saver is activated, the saver
is discontinued and restarts and lasts for 45 seconds, then the headlamps will be turned off.
Exterior lamp battery saver control time can be changed using “WORK SUPPORT” mode in “HEAD-
LAMP”.
When the lighting switch is turned from OFF to 2ND after headlamps are turned to off by the exterior lamp
battery saver control, ground is supplied
쐌
to smart entrance control unit terminals 20 and 58 from lighting switch terminal 11, and then,
쐌
to headlamp LH and RH relays terminal 2 from smart entrance control unit terminals 21 and 59,
쐌
through smart entrance control unit terminals 22 and 60 and
쐌
through lighting switch terminal 12.
Then headlamps illuminate again.
AUTO LIGHT OPERATION
NBEL0255S06
The auto light control system has an auto light sensor inside instrument mask that detects outside brightness.
쐌
to smart entrance control unit terminal 23
쐌
from lighting switch terminal 42.
When ignition switch is turned to “ON” or “START” position and
쐌
Outside brightness is darker than prescribed level.
After 3 seconds delay, outside brightness becomes darker than prescribed level.
Ground is supplied
쐌
to headlamp relay LH and RH terminals 2
쐌
through smart entrance control unit terminals 21, 59 and 43, 64.
Then both headlamp relays and tail lamp relay are energized, headlamps (low or high) and tail lamps are illu-
minated according to switch position.
Auto light operation allows headlamps and tail lamps to go off when
쐌
Outside brightness is brighter than prescribed level, or
쐌
After 5 seconds delay, outside brightness is brighter than prescribed level.
쐌
Ignition switch is turned to “OFF” position. (Headlamp will be turned OFF by exterior lamp battery saver
control system. Refer to EL-36.)
NOTE:
The delay time changes (maximum of 20 seconds) as the outside brightness changes.
For parking license and tail lamp auto operation, refer to “PARKING, LICENSE AND TAIL LAMPS”.
VEHICLE SECURITY SYSTEM
NBEL0255S07
The vehicle security system will flash the high beams if the system is triggered. Refer to “VEHICLE SECU-
RITY (THEFT WARNING) SYSTEM” (EL-455).
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HEADLAMP (FOR USA) — XENON TYPE —
System Description (Cont’d)
EL-37
XENON HEADLAMP
=NBEL0255S09
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.
쐌
The light produced by the headlamps is white color approximating sunlight that is easy on the eyes.
쐌
Light output is nearly double that of halogen headlamps, affording increased area of illumination.
쐌
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.
쐌
Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
SEL571X
HEADLAMP (FOR USA) — XENON TYPE —
System Description (Cont’d)
EL-38
Schematic
NBEL0256
MEL279Q
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HEADLAMP (FOR USA) — XENON TYPE —
Schematic
EL-39
Wiring Diagram — H/LAMP —
NBEL0257
MEL280Q
HEADLAMP (FOR USA) — XENON TYPE —
Wiring Diagram — H/LAMP —
EL-40
MEL281Q
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HEADLAMP (FOR USA) — XENON TYPE —
Wiring Diagram — H/LAMP — (Cont’d)
EL-41
MEL282Q
HEADLAMP (FOR USA) — XENON TYPE —
Wiring Diagram — H/LAMP — (Cont’d)
EL-42
MEL392R
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HEADLAMP (FOR USA) — XENON TYPE —
Wiring Diagram — H/LAMP — (Cont’d)
EL-43
SEL670Y
CONSULT-II Inspection Procedure
NBEL0258
“HEADLAMP”
NBEL0258S01
1.
Turn ignition switch “OFF”.
2.
Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
the data link connector.
SKIA3098E
3.
Turn ignition switch “ON”.
4.
Touch “START (NISSAN BASED VHCL)”.
SEL398Y
5.
Touch “SMART ENTRANCE”.
If “SMART ENTRANCE” is not indicated, go to GI-42, “CON-
SULT-II Data Link Connector (DLC) Circuit”.
SEL751Y
6.
Touch “HEADLAMP”.
SEL400Y
7.
Select diagnosis mode.
“DATA MONITOR”, “ACTIVE TEST” and “WORK SUPPORT”
are available.
HEADLAMP (FOR USA) — XENON TYPE —
CONSULT-II Inspection Procedure
EL-44
CONSULT-II Application Items
NBEL0453
“HEAD LAMP”
NBEL0453S01
Data Monitor
NBEL0453S0101
Monitored Item
Description
IGN ON SW
Indicates [ON/OFF] condition of ignition switch in ON position.
ACC ON SW
Indicates [ON/OFF] condition of ignition switch in ACC position.
AUTO LIGT SW
Displays status of the lighting switch as judged from the lighting switch signal.
(AUTO position: ON/Other than AUTO position: OFF)
AUTO LIGT SENS
Displays “Illumination outside of the vehicle (close to 5V when light/close to 0V when dark)” as
judged from the optical sensor signal.
LIGHT SW 1ST
Displays status of the lighting switch as judged from the lighting switch signal.
(1ST or 2ND position: ON/Other than 1ST and 2ND position: OFF)
LIGHT SW 2ND
Displays status of the lighting switch as judged from the lighting switch signal.
(2ND position: ON/Other than 2ND position: OFF)
DOOR SW-DR
Indicates [ON/OFF] condition of front door switch LH.
DOOR SW-AS
Indicates [ON/OFF] condition of door switch RH.
DOOR SW-RR
Indicates [ON/OFF] condition of rear door switch.
Active Test
NBEL0453S0102
Test Item
Description
TAIL LAMP
Tail lamp relay can be operated by on-off operation of the tail lamp.
HEAD LAMP
Headlamp relay can be operated by on-off operation of the headlamp.
AUTO LIGHT
Night time dimming signal can be operated by on-off operation.
Work Support
NBEL0453S0103
Work Item
Description
AUTO LIGHT SET
Auto light sensitivity can be changed in this mode. Sensitivity can be adjusted in four modes.
쐌
NORMAL/MODE 2 (Sensitive)/MODE 3 (Desensitized)/MODE 4 (Insensitive)
BATTERY SAVER SET
Exterior lamp battery saver control mode can be changed in this mode. Selects exterior lamp
battery saver control mode between two modes.
쐌
MODE 1 (ON)/MODE 2 (OFF)
ILL DELAY SET
Exterior lamp battery saver control time can be changed in this mode. Selects exterior lamp bat-
tery saver control time among eight modes.
쐌
MODE 1 (45 sec.)/MODE 2 (OFF)/MODE 3 (30 sec.)/MODE 4 (60 sec.)/ MODE 5 (90 sec.)/
MODE 6 (120 sec.)/MODE 7 (150 sec.)/MODE 8 (180 sec.)
Trouble Diagnoses
NBEL0260
WARNING:
쐌
The xenon headlamp has a high-tension current generating area. Be extremely careful when remov-
ing and installing. Be certain to disconnect the battery negative cable prior to removing or install-
ing.
쐌
When the xenon headlamp is lit, do not touch the harness (covered with red or amber insulation),
bulb itself or the bulb socket with your bare hands.
쐌
Never service a xenon headlamp with wet hands.
쐌
When checking body side harness with a circuit tester, be certain to disconnect the harness con-
nector from the xenon headlamp.
쐌
When the xenon headlamp is lit, the xenon bulb must be installed in the headlamp housing. (Never
turn on xenon headlamp, if the bulb is out of the headlamp housing.)
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HEADLAMP (FOR USA) — XENON TYPE —
CONSULT-II Application Items
EL-45
CAUTION:
Make sure to install the bulb securely; if the xenon bulb is improperly installed in its socket, high-ten-
sion current leaks occur. This may lead to a melted bulb and/or bulb socket.
Symptom
Possible cause
Repair order
Neither headlamp operates.
1. 7.5A fuse
2. Headlamp relay circuit
3. Lighting switch
4. Lighting switch ground circuit
5. Smart entrance control unit
1. Check 7.5A fuse [No. 24, located in fuse block
(J/B)].
Verify battery positive voltage is present at terminal
49 of smart entrance control unit.
2. Check between battery saver control unit and head-
lamp relays (LH and RH).
3. Check Lighting switch.
4. Check harness between lighting switch terminal 8
and ground.
5. Check smart entrance control unit. (EL-492)
Headlamp LH (low and high beam)
does not operate, but headlamp
RH (low and high beam) does
operate.
1. 15A fuse
2. Headlamp LH relay
3. Headlamp LH relay circuit
4. Lighting switch ground circuit
1. Check 15A fuse (No. 60, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminals 1 and 3 of headlamp LH relay.
2. Check headlamp LH relay.
3. Check the following.
쐌
Harness between headlamp LH relay and headlamp
LH
쐌
Harness between headlamp LH relay and smart
entrance control unit
4. Check harness between lighting switch and ground.
Headlamp RH (low and high beam)
does not operate, but headlamp LH
(low and high beam) does operate.
1. 15A fuse
2. Headlamp RH relay
3. Headlamp RH relay circuit
1. Check 15A fuse (No. 59, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminals 1 and 3 of headlamp RH relay.
2. Check headlamp RH relay.
3. Check the following.
쐌
Harness between headlamp RH relay and headlamp
RH
쐌
Harness between headlamp RH relay and smart
entrance control unit
4. Check harness between lighting switch and ground.
LH high beam does not operate,
but LH low beam operates.
1. Bulb
2. Headlamp LH relay
3. Open in the LH high beams cir-
cuit
4. Lighting switch
5. Lighting switch ground circuit
1. Check bulb.
2. Check headlamp LH relay.
3. Check the following.
a. Harness between headlamp LH relay terminal 5 and
headlamp LH for open circuit
b. Harness between headlamp LH and lighting switch
for open circuit
4. Check lighting switch.
5. Check harness between lighting switch and ground.
LH low beam does not operate, but
LH high beam operates.
1. 20A fuse
2. Headlamp LH relay
3. Open in the LH low beam circuit
4. LH low beam ground circuit
5. Xenon bulb
6. HID control unit
7. Booster
1. Check 20A fuse (No. 32, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminal 6 of headlamp LH relay.
2. Check headlamp LH relay
3. Check harness between headlamp LH relay terminal
7 and headlamp LH for open circuit.
4. Check harness between headlamp LH and ground.
5. Replace the xenon bulb with other side bulb or new
one. (If headlamps illuminate correctly, replace the
bulb.)
6. Replace the HID control unit with other side control
unit or new one. (If headlamps illuminate correctly,
replace the control unit.)
7. Replace booster as a headlamp assembly.
HEADLAMP (FOR USA) — XENON TYPE —
Trouble Diagnoses (Cont’d)
EL-46
Symptom
Possible cause
Repair order
RH high beam does not operate,
but RH low beam operates.
1. Bulb
2. Headlamp RH relay
3. Open in the RH high beams
circuit
4. Lighting switch
1. Check bulb.
2. Check headlamp RH relay.
3. Check the following.
a. Harness between headlamp RH relay terminal 5 and
headlamp RH for open circuit
b. Harness between headlamp RH and lighting switch
for open circuit
4. Check lighting switch.
RH low beam does not operate,
but RH high beam operates.
1. 20A fuse
2. Headlamp RH relay
3. Open in the RH low beam cir-
cuit
4. RH low beam ground circuit
5. Xenon bulb
6. HID control unit
7. Booster
1. Check 20A fuse (No. 31 located in fusible link and
fuse box). Verify battery positive voltage is present
at terminal 6 of headlamp RH relay.
2. Check headlamp RH relay
3. Check harness between headlamp RH relay termi-
nal 7 and headlamp RH for open circuit.
4. Check harness between headlamp RH and ground.
5. Replace the xenon bulb with other side bulb or new
one. (If headlamps illuminate correctly, replace the
bulb.)
6. Replace the HID control unit with other side control
unit or new one. (If headlamps illuminate correctly,
replace the control unit.)
7. Replace booster as a headlamp assembly.
High beam indicator does not work. 1. Bulb
2. Open in high beam circuit
1. Check bulb in combination meter.
2. Check the following.
a. Harness between headlamp LH relay and combina-
tion meter for an open circuit
b. Harness between high beam indicator and lighting
switch
Exterior lamp battery saver control
does not operate properly.
1. Door switch LH or RH circuit
2. Lighting switch circuit
3. Smart entrance control unit
1. Check the following.
a. Harness between smart entrance control unit and
LH or RH door switch for open or short circuit
b. LH or RH door switch ground circuit
c. LH or RH door switch
2. Check the following.
a. Harness between smart entrance control unit termi-
nals 20 or 58 and lighting switch terminal 11 for
open or short circuit
b. Harness between lighting switch terminal 5 and
ground
c. Lighting switch
3. Check smart entrance control unit. (EL-492)
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HEADLAMP (FOR USA) — XENON TYPE —
Trouble Diagnoses (Cont’d)
EL-47
Symptom
Possible cause
Repair order
When outside is dark, neither tail
lamp nor headlamp turn on by auto
light operation.
1. 7.5A fuse
2. Lighting switch “AUTO” check
3. Lighting switch circuit check
4. Lighting switch ground circuit
check
5. Auto light sensor check
6. Auto light sensor circuit check
1. Check 7.5A fuse [No. 11 located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
27 of smart entrance control unit.
2. Check lighting switch (AUTO) input signal with
“CONSULT-II” in “DATA MONITOR” mode.
When lighting switch is in AUTO:
AUTO LIGHT SWITCH ON
When lighting switch is in OFF:
AUTO LIGHT SWITCH OFF
3. Check harness for open or short between smart
entrance control unit and lighting switch.
4. Check harness for lighting switch and ground.
5. Check auto light sensor input signal.
(With CONSULT-II)
See “AUTO LIGHT SENSOR” in DATA MONITOR
mode. When auto light sensor in stuck by light:
More than 3V
When auto light sensor is not stuck by light:
Approx. 0.5V
(Without CONSULT-II)
Check voltage between smart entrance control unit
terminal 7 and ground. Refer to smart entrance con-
trol unit. (EL-492)
6. Check the following.
a. Harness for open or short between smart entrance
control unit terminal 8 and auto light sensor terminal
1
b. Harness for open or short between smart entrance
control unit terminal 7 and auto light sensor terminal
2
c. Harness for open or short between smart entrance
control unit terminal 9 and auto light sensor terminal
3
When outside is dark, tail lamp
turns on but headlamp does not
turn on by auto light operation.
Auto light output check
Check auto light output.
(With CONSULT-II)
See “HEADLAMP” and “TAIL LAMP” in ACTIVE TEST
mode, and headlamp switch to AUTO position.
Headlamp and tail lamp should turn on.
(Without CONSULT-II)
Check voltage between smart entrance control unit ter-
minals 19, 21, 57, 59 and ground. Refer to smart
entrance control unit. (EL-492)
When outside is dark, headlamp
turns on but tail lamp does not turn
on by auto light operation.
Auto light output check
Check auto light output.
(With CONSULT-II)
See “HEADLAMP” and “TAIL LAMP” in ACTIVE TEST
mode, and headlamp switch to AUTO position.
Headlamp and tail lamp should turn on.
(Without CONSULT-II)
Check voltage between smart entrance control unit ter-
minals 19, 21, 57, 59 and ground. Refer to smart
entrance control unit. (EL-492)
Light does not turn off when igni-
tion key switch is turned to “OFF”
(exterior lamp battery saver control
is canceled).
1. 7.5A fuse
2. IGN switch circuit
1. Check 7.5A fuse [No. 11 located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
27 of smart entrance control unit.
2. Check harness for open or short between smart
entrance control unit and fuse.
HEADLAMP (FOR USA) — XENON TYPE —
Trouble Diagnoses (Cont’d)
EL-48
Symptom
Possible cause
Repair order
When outside is bright, neither tail
lamps nor headlamps turn off by
auto light operation.
Auto light sensor check
Check auto light sensor input signal.
(With CONSULT-II)
See “AUTO LIGHT SENSOR” in DATA MONITOR
mode. When auto light sensor in stuck by light:
More than 3V
When auto light sensor is not stuck by light:
Approx. 0.5V
(Without CONSULT-II)
Check voltage between smart entrance control unit ter-
minal 7 (W/G) and ground. Refer to smart entrance
control unit. (EL-492)
Bulb Replacement/Xenon Type
NBEL0472
CAUTION:
쐌
After replacing a new xenon bulb, be sure to make aiming
adjustments.
쐌
Hold only the plastic base when handling the bulb. Never
touch the glass envelope.
쐌
Do not leave headlamp reflector without bulb for a long
period of time. Dust, moisture, smoke, etc. entering head-
lamp body may affect the performance of the headlamp.
Remove headlamp bulb from the headlamp reflector just
before a replacement bulb is installed.
1.
Disconnect negative battery cable.
2.
Disconnect headlamp connector.
3.
Remove headlamp assembly.
WARNING:
Never service a xenon headlamp without disconnecting nega-
tive battery cable and with wet hands.
SEL349X
XENON BULB (LOW BEAM)
NBEL0472S01
1.
Remove headlamp seal cover.
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HEADLAMP (FOR USA) — XENON TYPE —
Trouble Diagnoses (Cont’d)
EL-49
SEL461X
2.
Turn bulb socket counterclockwise with keep pushing, then
remove it.
SEL462X
3.
Release retaining pin.
4.
Remove the xenon bulb.
5.
Install in the reverse order of removal.
CAUTION:
쐌
When disposing of the xenon bulb, do not break it; always
dispose of it as is.
쐌
Make sure to install the bulb securely; if the xenon bulb is
improperly installed in its socket, high-tension current
leaks occur. This may lead to a melted bulb and/or bulb
socket.
SEL463X
HIGH BEAM
NBEL0472S02
1.
Turn the bulb counterclockwise (LH high beam) or clockwise
(RH high beam).
2.
Remove the bulb.
3.
Install in the reverse order of removal.
SEL464X
Aiming Adjustment
NBEL0473
LOW BEAM
NBEL0473S01
1.
Turn headlamp low beam on.
2.
Use adjusting screws to perform aiming adjustment.
쐌
First tighten the adjusting screw all the way and then
make adjustment by loosening the screw.
HEADLAMP (FOR USA) — XENON TYPE —
Bulb Replacement/Xenon Type (Cont’d)
EL-50
SEL376X
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.
쐌
Basic illuminating area for adjustment should be within
the range shown on the aiming chart. Adjust headlamps
accordingly.
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HEADLAMP (FOR USA) — XENON TYPE —
Aiming Adjustment (Cont’d)
EL-51
Component Parts and Harness Connector
Location
NBEL0263
SEL668Y
System Description
NBEL0264
The headlamp system for Canada vehicles contains a daytime light control unit that activates the high beam
headlamps at approximately half illumination whenever the engine is running. 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.
And battery saver system is controlled by the smart entrance control unit.
Power is supplied at all times
쐌
to headlamp LH relay terminals 1 and 3
쐌
through 15A fuse (No. 60, located in the fuse and fusible link box), and
쐌
to headlamp LH relay terminal 6
쐌
through 20A fuse (No. 32, located in fuse and fusible link box), and
쐌
to headlamp RH relay terminals 1 and 3
쐌
through 15A fuse (No. 59, located in the fuse and fusible link box), and
쐌
to headlamp RH relay terminal 6
쐌
through 20A fuse (No. 31, located in fuse and fusible link box), and
쐌
to smart entrance control unit terminal 49
쐌
through 7.5A fuse [No. 24, located in the fuse block (J/B)].
Ground is supplied
쐌
to daytime light control unit terminal 16
쐌
through body grounds E13 and E41, and
쐌
to smart entrance control unit terminals 43 and 64
쐌
through body grounds M77 and M111.
When the ignition switch is in the ON or START position, power is also supplied
쐌
to daytime light control unit terminal 3, and
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Component Parts and Harness Connector Location
EL-52
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