Infiniti QX4. Electrical System (2003 year). Manual — part 4
쐌
to smart entrance control unit terminal 27
쐌
through 7.5A fuse [No. 11, located in the fuse block (J/B)].
When the ignition switch is in the ACC or ON position, power is supplied
쐌
to smart entrance control unit terminal 26
쐌
through 10A fuse [No. 10, located in the fuse block (J/B)].
When the ignition switch is in the START position, power is supplied
쐌
to daytime light control unit terminal 2
쐌
through 7.5A fuse [No. 26, located in the fuse block (J/B)].
HEADLAMP OPERATION
NBEL0264S01
Power Supply to Low Beam and High Beam
NBEL0264S0101
When lighting switch is in 2ND or PASS position, ground is supplied
쐌
to headlamp relay (LH and RH) terminal 2 from smart entrance control unit terminals 21 and 59
쐌
through smart entrance control unit terminals 22 and 60
쐌
from lighting switch terminal 12.
Headlamp relays (LH and RH) are energized and then power is supplied to headlamps (LH and RH).
Low Beam Operation
NBEL0264S0102
When the lighting switch is turned to 2ND and LOW (“B”) positions, ground is supplied
쐌
to terminal 7 of each headlamp relay through terminal 3 of each headlamp
쐌
to terminal 4 of each headlamp
쐌
through body grounds E13 and E41.
With power and ground supplied, the low beam headlamps illuminate.
High Beam Operation/Flash-to-pass Operation
NBEL0264S0103
When the lighting switch is turned to 2ND and HIGH (“A”) or PASS (“C”) positions, power is supplied
쐌
to terminal 1 of headlamp LH
쐌
through daytime light control unit terminals 6 and 5
쐌
from headlamp LH relay terminal 5, and
쐌
to terminal 1 of headlamp RH
쐌
through daytime light control unit terminals 7 and 4
쐌
from headlamp RH relay terminal 5, and
쐌
to combination meter terminal 26 for HIGH BEAM indicator
쐌
from headlamp LH relay terminal 5.
Ground is supplied
쐌
to terminal 2 of LH headlamp
쐌
through daytime light control unit terminals 10 and 13, and
쐌
to combination meter terminal 27 for the HIGH BEAM indicator
쐌
through lighting switch terminals 6 and 5
쐌
through body grounds E13 and E41, and
쐌
to terminal 2 of RH headlamp
쐌
through daytime light control unit terminals 9 and 14, and
쐌
through lighting switch terminals 9 and 8
쐌
through body grounds E13 and E41.
With power and ground supplied, the high beam headlamps and HIGH BEAM indicator illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
NBEL0264S02
Except for Auto Light Control Operation
NBEL0264S0201
Headlamps will remain on for a short while after the ignition switch is turned from ON (or ACC) to OFF.
Continuity between terminals 21 and 22, and between terminals 59 and 60 of smart entrance control unit will
be disturbed after 5 minutes, then the headlamps will be turned off.
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,
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
System Description (Cont’d)
EL-53
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 control operation
NBEL0264S0202
While the headlamps are turned ON by “AUTO” operation, the exterior lamp battery saver is activated for 5
minutes when the ignition switch is turned from ON (or ACC) to OFF, and either LH or RH front door switch
is opened.
The smart entrance control unit controls exterior lamp battery saver activation as follows:
쐌
When the door switch signal changes from ON to OFF while the exterior lamp battery saver is activated,
the operation is discontinued, restarts and lasts for 45 seconds, then the headlamps will be turned off.
쐌
When the door switch signal changes from OFF to ON while the exterior lamp battery saver is activated,
the operation is 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
NBEL0264S03
For auto light operation, refer to “HEADLAMP (FOR USA) — XENON TYPE —” (EL-37).
DAYTIME LIGHT OPERATION
NBEL0264S04
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is
supplied
쐌
through daytime light control unit terminal 7
쐌
to terminal 1 of headlamp RH
쐌
through terminal 2 of headlamp RH
쐌
to daytime light control unit terminal 9
쐌
through daytime light control unit terminal 6
쐌
to terminal 1 of headlamp LH.
Ground is supplied to terminal 2 of headlamp LH.
쐌
through daytime light control unit terminals 10 and 16
쐌
through body grounds E13 and E41.
Because the high beam headlamps are now wired in series, they operate at half illumination.
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
System Description (Cont’d)
EL-54
OPERATION
=NBEL0264S05
After starting the engine with the lighting switch in the “OFF” or “1ST” position, the headlamp high beam auto-
matically turns on. Lighting switch operations other than the above are the same as conventional light sys-
tems.
Engine
With engine stopped
With engine running
Lighting switch
OFF
1ST
2ND
OFF
1ST
2ND
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
A
B
C
Headlamp
High beam
X
X
O
X
X
O
O
X
O
왕
*
왕
*
O
왕
*
왕
*
O
O
X
O
Low beam
X
X
X
X
X
X
X
O
X
X
X
X
X
X
X
X
O
X
Clearance and tail lamp
X
X
X
O
O
O
O
O
O
X
X
X
O
O
O
O
O
O
License and instrument illumination
lamp
X
X
X
O
O
O
O
O
O
X
X
X
O
O
O
O
O
O
A: “HIGH BEAM” position
B: “LOW BEAM” position
C: “FLASH TO PASS” position
O : Lamp “ON”
X : Lamp “OFF”
왕
: Lamp dims. (Added functions)
*: When starting the engine with the parking brake released, the daytime light will come ON.
When starting the engine with the parking brake pulled, the daytime light won’t come ON.
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
System Description (Cont’d)
EL-55
Schematic
NBEL0265
MEL284Q
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Schematic
EL-56
Wiring Diagram — DTRL —
NBEL0266
MEL285Q
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Wiring Diagram — DTRL —
EL-57
MEL286Q
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Wiring Diagram — DTRL — (Cont’d)
EL-58
MEL287Q
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Wiring Diagram — DTRL — (Cont’d)
EL-59
MEL288Q
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Wiring Diagram — DTRL — (Cont’d)
EL-60
MEL393R
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Wiring Diagram — DTRL — (Cont’d)
EL-61
CONSULT-II Inspection Procedure
NBEL0267
“HEADLAMP”
Refer to “HEADLAMP (FOR USA) — XENON TYPE —” (EL-44).
CONSULT-II Application Items
NBEL0268
“HEADLAMP”
Refer to “HEADLAMP (FOR USA) — XENON TYPE —” (EL-45).
Trouble Diagnoses
NBEL0269
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.)
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. Lighting switch
3. 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 Lighting switch.
3. Check smart entrance control unit. (EL-492)
LH headlamp (low and high beam)
does not operate, but RH head-
lamp (low and high beam) does
operate.
1. 15A fuse
2. Headlamp LH relay
3. Headlamp LH relay circuit
4. Lighting switch circuit
5. Smart entrance control unit
1. Check 15A fuse (No. 60, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminal 1 and 3 of headlamp LH relay.
2. Check headlamp LH relay.
3. Check harness between headlamp LH relay and
smart entrance control unit.
4. Check harness between smart entrance control unit
and lighting switch.
5. Check smart entrance control unit. (EL-492)
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
CONSULT-II Inspection Procedure
EL-62
Symptom
Possible cause
Repair order
RH headlamp (low and high beam)
does not operate, but LH headlamp
(low and high beam) does operate.
1. 15A fuse
2. Headlamp RH relay
3. Headlamp RH relay circuit
4. Lighting switch circuit
5. Smart entrance control unit
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 harness between headlamp RH relay and
smart entrance control unit.
4. Check harness between smart entrance control unit
and lighting switch.
5. Check smart entrance control unit. (EL-492)
LH high beam does not operate,
but LH low beam operates.
1. Bulb
2. Headlamp LH relay
3. Headlamp LH relay circuit
4. Headlamp LH high beams cir-
cuit
5. Lighting switch
6. Lighting switch circuit
7. Daytime light control unit
1. Check bulb.
2. Check headlamp LH relay.
3. Check the following.
a. Harness between headlamp LH relay and daytime
light control unit
b. Harness between headlamp LH relay terminal 3 and
fuse block
4. Check harness between LH headlamp and daytime
light control unit.
5. Check lighting switch.
6. Check the following.
a. Harness between daytime light control unit and light-
ing switch
b. Harness between lighting switch and ground
7. Check daytime light control unit. (EL-66)
LH low beam does not operate, but
LH high beam operates.
1. 20A fuse
2. Headlamp relay LH
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 relay LH.
3. Check harness between headlamp relay LH terminal
7 and LH headlamp for open circuit.
4. Check harness between LH headlamp 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.
RH high beam does not operate,
but RH low beam operates.
1. Bulb
2. Headlamp RH relay
3. Headlamp RH relay circuit
4. Open in the RH high beams
circuit
5. Lighting switch
6. Lighting switch circuit
7. Daytime light control unit
1. Check bulb.
2. Check headlamp RH relay.
3. Check the following.
a. Harness between headlamp RH relay and daytime
light control unit
b. Harness between headlamp RH relay terminal 3 and
fuse block
4. Check harness between RH headlamp and daytime
light control unit.
5. Check lighting switch.
6. Check the following.
a. Harness between daytime light control unit and light-
ing switch
b. Harness between lighting switch and ground
7. Check daytime light control unit. (EL-66)
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Trouble Diagnoses (Cont’d)
EL-63
Symptom
Possible cause
Repair order
RH low beam does not operate,
but RH high beam operates.
1. 20A fuse
2. Headlamp relay RH
3. Open circuit in the RH low
beam wiring.
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 relay RH.
3. Check harness between headlamp relay RH termi-
nal 7 and RH headlamp for open circuit.
4. Check harness between RH headlamp 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 daytime light control unit and com-
bination 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)
Daytime light control does not
operate properly.
1. Fuse check
2. Parking brake switch
3. Parking brake switch circuit
4. Alternator circuit
5. Daytime light control unit
1. Check the following.
a. 10A fuse [No. 8, located in fuse block (J/B)]. Verify
battery positive voltage is present at terminal 3 of
daytime light control unit
b. 7.5A fuse [No. 26, located in fuse block (J/B)]. Verify
battery positive voltage is present at terminal 2 of
daytime light control unit
2. Check parking brake switch.
3. Check harness between parking brake switch and
daytime light control unit.
4. Check harness between alternator and daytime light
control unit.
5. Check daytime light control unit. (EL-66)
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Trouble Diagnoses (Cont’d)
EL-64
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, 57 and ground. Refer to smart entrance con-
trol 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.
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Trouble Diagnoses (Cont’d)
EL-65
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)
DAYTIME LIGHT CONTROL UNIT INSPECTION TABLE
NBEL0269S01
Terminal
No.
Wire
color
Item
Condition
Voltage
(Approximate values)
1
Y/B
Alternator
When turning ignition switch to “ON”
Less than 1V
When engine is running
Battery voltage
When turning ignition switch to “OFF”
Less than 1V
2
Y/R
Start signal
When turning ignition switch to “ST”
Battery voltage
When turning ignition switch to “ON” from “ST”
Less than 1V
When turning ignition switch to “OFF”
Less than 1V
3
G
Power source
When turning ignition switch to “ON”
Battery voltage
When turning ignition switch to “ST”
Battery voltage
When turning ignition switch to “OFF”
Less than 1V
4
R/L
Power source
When turning ignition switch to “ON”
Battery voltage
When turning ignition switch to “OFF”
Battery voltage
5
R/W
Power source
When turning ignition switch to “ON”
Battery voltage
When turning ignition switch to “OFF”
Battery voltage
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Trouble Diagnoses (Cont’d)
EL-66
Terminal
No.
Wire
color
Item
Condition
Voltage
(Approximate values)
6
R
LH hi beam
When lighting switch is turned to the 2ND position with
“HI BEAM” position
Battery voltage
When releasing parking brake with engine running and
turning lighting switch to “OFF” (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.
Approx. half battery
voltage
7
L/R
RH hi beam
When lighting switch is turned to the 2ND position with
“HI BEAM” position
Battery voltage
When releasing parking brake with engine running and
turning lighting switch to “OFF” (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.
Battery voltage
9
PU
RH hi beam
(ground)
When lighting switch is turned to the 2ND position with
“HI BEAM” position
Less than 1V
When releasing parking brake with engine running and
turning lighting switch to “OFF” (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.
Approx. half battery
voltage
10
GY
LH hi beam
(ground)
When lighting switch is turned to the 2ND position with
“HI BEAM” position
Less than 1V
When releasing parking brake with engine running and
turning lighting switch to “OFF” (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.
Less than 1V
13
14
L/W
W/R
Lighting switch
(Hi beam)
When turning lighting switch to “HI BEAM”
Less than 1V
When turning lighting switch to “FLASH TO PASS”
Less than 1V
16
B
Ground
—
—
17
L/G
Parking brake
switch
When parking brake is released
Battery voltage
When parking brake is set
Less than 1.5V
Bulb Replacement
Refer to “HEADLAMP (FOR USA) — XENON TYPE —” (EL-49).
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HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Trouble Diagnoses (Cont’d)
EL-67
Aiming Adjustment
NBEL0271
Refer to “HEADLAMP (FOR USA) — XENON TYPE —” (EL-50).
HEADLAMP (FOR CANADA) — DAYTIME LIGHT SYSTEM —
Aiming Adjustment
EL-68
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