2001 INFINITI QX4 Factory Service Manual

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Page 1249 of 2395

INFINITI QX4 2001 Factory Service Manual MEL775L
PARKING, LICENSE AND TAIL LAMPS
Wiring Diagram Ð TAIL/L Ð (Contd)
EL-64

Page 1250 of 2395

INFINITI QX4 2001 Factory Service Manual MEL776L
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PARKING, LICENSE AND TAIL LAMPS
Wiring Diagram Ð TAIL/L Ð (Contd)
EL-65

Page 1251 of 2395

INFINITI QX4 2001 Factory Service Manual 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,

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

Page 1252 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring Diagram Ð STOP/L ÐNBEL0025
MEL777L
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STOP LAMP
Wiring Diagram Ð STOP/L Ð
EL-67

Page 1253 of 2395

INFINITI QX4 2001 Factory Service Manual MEL262M
STOP LAMP
Wiring Diagram Ð STOP/L Ð (Contd)
EL-68

Page 1254 of 2395

INFINITI QX4 2001 Factory Service Manual Wiring Diagram Ð BACK/L ÐNBEL0026
MEL778L
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BACK-UP LAMP
Wiring Diagram Ð BACK/L Ð
EL-69

Page 1255 of 2395

INFINITI QX4 2001 Factory Service Manual 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 headlam

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

Page 1256 of 2395

INFINITI QX4 2001 Factory Service Manual 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 (Contd)
EL-71

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