2001 INFINITI QX4 Battery

Ito daytime light control unit terminal 3,
Ito auto light control unit terminal 1,
Ito headlamp battery saver control unit terminal 10, and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)], and
Ito headlamp battery saver control unit terminal 1
Ithrough 10A fuse [No. 16, located in the fuse block (J/B)].
When the ignition switch is in the START position, power is supplied
Ito daytime light control unit terminal 2
Ithrough 7.5A fuse [No. 26, located in the fuse block (J/B)].
When the ignition switch is in the ACC or ON position, power is supplied
Ito auto light control unit terminal 2
Ithrough 10A fuse [No. 9, located in the fuse block (J/B)].
HEADLAMP OPERATIONNBEL0192S01Power Supply to Low Beam and High BeamNBEL0192S0101When lighting switch is in 2ND or PASS position, ground is supplied
Ito headlamp relay (LH and RH) terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminal 3 and 9
Ifrom lighting switch terminal 12.
Headlamp relays (LH and RH) are energized.
Low Beam OperationNBEL0192S0102When the lighting switch is turned to 2ND and LOW (ªBº) positions, power is supplied
Ifrom terminal 7 of each headlamp relay
Ito terminal 3 of each headlamp
Ground is supplied
Ito terminal 4 of each headlamp
Ithrough body grounds E13 and E41.
With power and ground supplied, the low beam headlamps illuminate.
High Beam Operation/Flash-to-pass OperationNBEL0192S0103When the lighting switch is turned to 2ND and HIGH (ªAº) or PASS (ªCº) positions, power is supplied
Ito terminal 1 of headlamp LH
Ithrough daytime light control unit terminals 6 and 5
Ifrom headlamp LH relay terminal 5
Ito terminal 1 of headlamp RH
Ithrough daytime light control unit terminals 7 and 4
Ifrom headlamp RH relay terminal 5, and
Ito combination meter terminal 26 for HIGH BEAM indicator
Ifrom headlamp LH relay terminal 5.
Ground is supplied
Ito terminal 2 of LH headlamp
Ithrough daytime light control unit terminals 10 and 13, and
Ito combination meter terminal 27 for the HIGH BEAM indicator
Ithrough lighting switch terminals 6 and 5
Ithrough body grounds E13 and E41, and
Ito terminal 2 of RH headlamp
Ithrough daytime light control unit terminals 9 and 14
Ithrough lighting switch terminals 9 and 8
Ithrough body grounds E13 and E41.
With power and ground supplied, the high beam headlamps and HIGH BEAM indicator illuminate.
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HEADLAMP (FOR CANADA) Ð DAYTIME LIGHT SYSTEM Ð
System Description (Cont'd)
EL-47

BATTERY SAVER CONTROLNBEL0192S02When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are
illuminated, The RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart
entrance control unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 2 of headlamp LH and RH relays from headlamp battery saver con-
trol unit terminals 2 and 8 is terminated.
Then headlamps are turned off.
The headlamps are turned off when LH or RH door is opened even if 45 seconds have not passed after the
ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are illuminated.
When the lighting switch is turned from OFF to 2ND after headlamps are turned to off by the battery saver
control, ground is supply
Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito headlamp LH and RH relays terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminals 3 and 9, and
Ithrough lighting switch terminal 12.
Then headlamps illuminate again.
AUTO LIGHT OPERATIONNBEL0192S03For auto light operation, refer to ªHEADLAMPº (EL-33).
DAYTIME LIGHT OPERATIONNBEL0192S04With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is
supplied
Ithrough daytime light control unit terminals 3 and 7
Ito terminal 1 of RH headlamp
Ithrough terminal 2 of RH headlamp
Ito daytime light control unit terminal 9
Ithrough daytime light control unit terminal 6
Ito terminal 1 of LH headlamp.
Ground is supplied to terminal 2 of LH headlamp.
Ithrough daytime light control unit terminals 10 and 16
Ithrough body grounds E13 and E41.
Because the high beam headlamps are now wired in series, they operate at half illumination.
HEADLAMP (FOR CANADA) Ð DAYTIME LIGHT SYSTEM Ð
System Description (Cont'd)
EL-48

Trouble DiagnosesNBEL0193DAYTIME LIGHT CONTROL UNIT INSPECTION TABLENBEL0193S01
Terminal
No.Wire
colorItem ConditionVoltage
(Approximate values)
1 Y/B Alternator
When turning ignition switch to ªONº Less than 1V
When engine is running Battery voltage
When turning ignition switch to ªOFFº Less than 1V
2 Y/R Start signal
When turning ignition switch to ªSTº Battery voltage
When turning ignition switch to ªONº from ªSTº Less than 1V
When turning ignition switch to ªOFFº Less than 1V
3 G Power source
When turning ignition switch to ªONº Battery voltage
When turning ignition switch to ªSTº Battery voltage
When turning ignition switch to ªOFFº Less than 1V
4 R/L Power source
When turning ignition switch to ªONº Battery voltage
When turning ignition switch to ªOFFº Battery voltage
5 R/W Power source
When turning ignition switch to ªONº Battery voltage
When turning ignition switch to ªOFFº Battery voltage
6 R LH hi beam When lighting switch is turned to the 2ND position with
ªHI BEAMº positionBattery voltage
When releasing parking brake with engine running and
turning lighting switch to ªOFFº (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.Approx. half battery
voltage
HEADLAMP (FOR CANADA) Ð DAYTIME LIGHT SYSTEM Ð
Trouble Diagnoses
EL-56

Terminal
No.Wire
colorItem ConditionVoltage
(Approximate values)
7 L/R RH hi beam When lighting switch is turned to the 2ND position with
ªHI BEAMº positionBattery voltage
When releasing parking brake with engine running and
turning lighting switch to ªOFFº (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.Approx. half battery
voltage
9 PU RH hi beam
(ground)When lighting switch is turned to the 2ND position with
ªHI BEAMº positionLess than 1V
When releasing parking brake with engine running and
turning lighting switch to ªOFFº (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
ªHI BEAMº positionLess than 1V
When releasing parking brake with engine running and
turning lighting switch to ªOFFº (daytime light operation)
CAUTION:
Block wheels and ensure selector lever is in N or P
position.Approx. half battery
voltage
13
14L/W
W/RLighting switch
(Hi beam)When turning lighting switch to ªHI BEAMº Battery voltage
When turning lighting switch to ªFLASH TO PASSº Battery voltage
16 B Ground Ð Ð
17 L/G Parking brake
switch
When parking brake is released Battery voltage
When parking brake is set Less than 1.5V
BATTERY SAVER CONTROL UNIT INSPECTION TABLENBEL0193S02Refer to ªHEADLAMP (FOR USA)º, EL-42.
Bulb ReplacementNBEL0194Refer to ªHEADLAMP (FOR USA)º (EL-43).
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HEADLAMP (FOR CANADA) Ð DAYTIME LIGHT SYSTEM Ð
Trouble Diagnoses (Cont'd)
EL-57

System DescriptionNBEL0162The parking, license and tail lamp operation is controlled by the lighting switch which is built into the combi-
nation switch and headlamp battery saver control unit. The battery saver system is controlled by the head-
lamp battery saver control unit and smart entrance control unit.
Power is supplied at all times
Ito tail lamp relay terminals 2 and 3
Ithrough 10A fuse (No. 61, located in the fuse and fusible link box), and
Ito headlamp battery saver control unit terminal 7, and
Ito smart entrance control unit terminal 10
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)].
When ignition switch is in ON or START position, power is supplied
Ito headlamp battery saver control unit terminal 1
Ithrough 10A fuse [No. 16, located in the fuse block (J/B)], and
Ito headlamp battery saver control unit terminal 10, and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)].
Ground is supplied to headlamp battery saver control unit terminals 4 and 11.
LIGHTING OPERATION BY LIGHTING SWITCHNBEL0162S01When lighting switch is in 1ST (or 2ND) position, ground is supplied
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14
Ithrough headlamp battery saver control unit terminals 5 and 13, and
Ito combination switch (lighting switch) terminal 11
Ithrough combination switch (lighting switch) terminal 5
Ithrough body grounds E13 and E41.
Tail lamp relay is then energized and the parking, license and tail lamps illuminate.
LIGHTING OPERATION BY AUTO LIGHT CONTROL SYSTEMNBEL0162S03When auto light control system is operated, ground is supplied
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14
Ithrough headlamp battery saver control unit terminals 5 and 13, and
Ithrough auto light control unit terminal 7.
Tail lamp relay is then energized and the parking, license and tail lamps illuminate.
BATTERY SAVER CONTROLNBEL0162S02When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while parking, license and
tail lamps are illuminated, the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit
from smart entrance control unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 1 of the tail lamp relay from headlamp battery saver control unit
terminals 6 and 14 is terminated.
Then the parking, license and tail lamps are turned off.
The parking, license and tail lamps are turned off when driver or passenger side door is opened even if 45
seconds have not passed after the ignition switch is turned from ON (or START) to OFF (or ACC) positions
while parking, license and tail lamps are illuminated.
When the lighting switch is turned from OFF to 1ST (or 2ND) after the parking, license and tail lamps are turned
off by the battery saver control, ground is supplied.
Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito tail lamp relay terminal 1 from headlamp battery saver control unit terminals 6 and 14.
Then the parking, license and tail lamps illuminate again.
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PARKING, LICENSE AND TAIL LAMPS
System Description
EL-61

Trouble DiagnosesNBEL0164
Symptom Possible cause Repair order
No lamps operate (including head-
lamps).1. 7.5A fuse
2. Lighting switch
3. Headlamp battery saver control
unit1. Check 7.5A fuse [No. 24, lacated in fuse block
(J/B)]. Verify battery positive voltage is present at
terminal 7 of headlamp battery saver control unit.
2. Check lighting switch.
3. Check headlamp battery saver control unit. (EL-42)
No parking, license and tail lamps
operate, but headlamps do operate.1. 10A fuse
2. Tail lamp relay
3. Tail lamp relay circuit
4. Lighting switch
5. Lighting switch circuit
6. Headlamp battery saver control
unit1. Check 10A fuse (No. 61, located in fusible and fuse
block). Verify battery positive voltage is present at
terminals 2 and 3 of tail lamp relay.
2. Check tail lamp relay.
3. Check the following.
a. Harness between headlamp battery saver control
unit terminals 6 and 14 and tail lamp relay terminal
1
b. Harness between tail lamp relay terminal 5 and fuse
block
4. Check lighting switch.
5. Check the following.
a. Harness between lighting switch terminal 11 and
headlamp battery saver control unit terminals 5 and
13
b. Harness between lighting switch terminal 5 and
ground
6. Check headlamp battery saver control unit. (EL-42)
Battery saver control does not
operate properly.1. RAP signal circuit
2. Driver or passenger side door
switch circuit
3. Lighting switch circuit
4. Headlamp battery saver control
unit
5. Smart entrance control unit1. Check harness between headlamp battery saver
control unit terminal 10 and smart entrance control
unit terminal 5 for open or short circuit.
2. Check the following.
a. Harness between smart entrance control unit and
driver or passenger side door switch for open or
short circuit
b. Driver or passenger side door switch ground circuit
c. Driver or passenger side door switch.
3. Check the following.
a. Harness between headlamp battery saver control
unit terminals 5 or 13 and lighting switch terminal 11
for open or short circuit
b. Harness between lighting switch terminal 5 and
ground
c. Lighting switch
4. Check headlamp battery saver control unit. (EL-42)
5. Check smart entrance control unit. (EL-324)
PARKING, LICENSE AND TAIL LAMPS
Trouble Diagnoses
EL-66

System DescriptionNBEL0027OUTLINENBEL0027S02Power is supplied at all times
Ito headlamp RH relay terminals 1 and 3
Ithrough 15A fuse (No. 59, located in the fuse and fusible link box), and
Ito headlamp battery saver control unit terminal 7
Ito smart entrance control unit terminal 10
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)], and
Ito front fog lamp relay terminal 3
Ithrough 15A fuse (No. 53, located in the fuse and fusible link box).
When ignition switch is in ON or START position, power is supplied
Ito headlamp battery saver control unit terminal 1
Ithrough 10A fuse [No. 16, located in the fuse block (J/B)], and
Ito headlamp battery saver control unit terminal 10, and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)].
Ground is supplied to headlamp battery saver control unit terminals 4 and 11.
When lighting system is in 2ND position, ground is supplied
Ito headlamp RH relay terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminals 3 and 9,
Ithrough lighting switch terminal 12, and
Ithrough body grounds E13 and E41.
Headlamp RH relay is then energized.
FRONT FOG LAMP OPERATIONNBEL0027S01The front fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position
and LOW (ªBº) position for front fog lamp operation.
With the front fog lamp switch in the ON position, ground is supplied
Ito front fog lamp relay terminal 2
Ithrough the front fog lamp switch, lighting switch and body grounds E13 and E41.
The front fog lamp relay is energized and power is supplied
Ifrom front fog lamp relay terminal 5
Ito terminal 1 of each front fog lamp.
Ground is supplied to terminal 3 of each front fog lamp through body grounds E13 and E41.
With power and ground supplied, the front fog lamps illuminate.
BATTERY SAVER CONTROLNBEL0027S03When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while front fog lamps are
illuminated, the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart
entrance control unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 2 of headlamp RH relay from headlamp battery saver control unit
teminals 2 and 8 are terminated.
Then front fog lamps are turned to off.
Front fog lamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after the ignition switch is turned from ON (or START) to OFF (or ACC) positions while front fog lamps
are illuminated.
When the lighting switch is turned from OFF to 2ND after front fog lamps are turned off by the battery saver
control, ground is supplied
Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito headlamp RH relay terminal 2 from headlamp battery saver control unit terminals 2 and 8
Ithrough headlamp battery saver control unit terminals 3 and 9, and
Ithrough lighting switch terminal 12.
Then the front fog lamps illuminate again.
FRONT FOG LAMP
System Description
EL-70

NOTE:
For Trouble Diagnoses for battery saver control, refer to ªHEADLAMP (FOR USA)º, EL-40.
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FRONT FOG LAMP
System Description (Cont'd)
EL-71