warning INFINITI QX4 2001 Factory Workshop Manual

Trouble DiagnosesNBEL0189WARNING:
IThe 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.
IWhen 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.
INever service a xenon headlamp with wet hands.
IWhen checking body side harness with a circuit tester, be certain to disconnect the harness con-
nector from the xenon headlamp.
IWhen 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. Headlamp relay circuit
3. Lighting switch
4. Lighting switch ground circuit
5. Headlamp battery saver control
unit1. Check 7.5A fuse [No. 24, located in fuse block
(J/B)].
Verify battery positive voltage is present at terminal
7 of headlamp battery saver 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 headlamp battery saver control unit.
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 circuit1. 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 harness between headlamp LH relay and
headlamp battery saver control unit.
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 circuit1. 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
headlamp battery saver control unit.
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 circuit1. 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.
HEADLAMP (FOR USA) Ð XENON TYPE Ð
Trouble Diagnoses
EL-40

Terminal No.Wire
colorItem ConditionVoltage
(Approximate value)
10 R/Y RAP signal Ignition switch OFF or ACC
(After more than 45 seconds with ignition
switch turned OFF or ACC)Less than 1V
ON or START Battery voltage
11 B Ground Ð Ð
13 G Tail lamp switch Lighting switch OFF Battery voltage
1ST or 2ND Less than 1V
14 R Tail lamp relay Ignition switch
(with lighting switch
1ST or 2ND)OFF or ACC More than 45 sec-
onds after ignition
switch is turned
OFF or ACCBattery voltage
Within 45 seconds
after ignition switch
is turned OFF or
ACCLess than 1V
ON or START Less than 1V
Headlamps illuminate by auto light control. Less than 1V
Bulb Replacement/Xenon TypeNBEL0190CAUTION:
IAfter replacing a new xenon bulb, be sure to make aiming
adjustments.
IHold only the plastic base when handling the bulb. Never
touch the glass envelope.
IDo 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)NBEL0190S011. Remove headlamp seal cover.
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HEADLAMP (FOR USA) Ð XENON TYPE Ð
Trouble Diagnoses (Cont'd)
EL-43

System DescriptionNBEL0030TURN SIGNAL OPERATIONNBEL0030S01With the hazard switch in the OFF position and the ignition switch in the ON or START position, power is sup-
plied
Ithrough 7.5A fuse [No. 12, located in the fuse block (J/B)]
Ito hazard switch terminal 2
Ithrough terminal 1 of the hazard switch
Ito combination flasher unit terminal 1
Ithrough terminal 3 of the combination flasher unit
Ito turn signal switch terminal 1.
Ground is supplied to combination flasher unit terminal 2 through body grounds M4, M66 and M147.
LH TurnNBEL0030S0101When the turn signal switch is moved to the LH position, power is supplied from turn signal switch terminal 3
to
Ifront fog lamp LH (turn signal) terminal 2
Icombination meter terminal 25
Irear combination lamp LH terminal 5.
Ground is supplied to the front fog lamp LH (turn signal) terminal 3 through body grounds E13 and E41.
Ground is supplied to the rear combination lamp LH terminal 6 through body grounds B11, B22 and D210.
Ground is supplied to combination meter terminal 30 through body grounds M4, M66 and M147.
With power and ground supplied, the combination flasher unit controls the flashing of the LH turn signal lamps.
RH TurnNBEL0030S0102When the turn signal switch is moved to the RH position, power is supplied from turn signal switch terminal
2to
Ifront fog lamp RH (turn signal) terminal 2
Icombination meter terminal 29
Irear combination lamp RH terminal 5.
Ground is supplied to the front fog lamp RH (turn signal) terminal 3 through body grounds E13 and E41.
Ground is supplied to the rear combination lamp RH terminal 6 through body grounds B55 and B75.
Ground is supplied to combination meter terminal 30 through body grounds M4, M66 and M147.
With power and ground supplied, the combination flasher unit controls the flashing of the RH turn signal lamps.
HAZARD LAMP OPERATIONNBEL0030S02Power is supplied at all times to hazard switch terminal 3 through:
I15A fuse [No. 20, located in the fuse block (J/B)].
With the hazard switch in the ON position, power is supplied
Ithrough terminal 1 of the hazard switch
Ito combination flasher unit terminal 1
Ithrough terminal 3 of the combination flasher unit
Ito hazard switch terminal 4.
Ground is supplied to combination flasher unit terminal 2 through body grounds M4, M66 and M147.
Power is supplied through terminal 5 of the hazard switch to
Ifront fog lamp LH (turn signal) terminal 2
Icombination meter terminal 25
Irear combination lamp LH terminal 5.
Power is supplied through terminal 6 of the hazard switch to
Ifront fog lamp RH (turn signal) terminal 2
Icombination meter terminal 29
Irear combination lamp RH terminal 5.
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TURN SIGNAL AND HAZARD WARNING LAMPS
System Description
EL-75

Ground is supplied to terminal 3 of each front fog lamp (turn signal) through body grounds E13 and E41.
Ground is supplied to terminal 6 of the rear combination lamp LH through body grounds B11, B22 and D210.
Ground is supplied to terminal 6 of the rear combination lamp RH through body grounds B55 and B75.
Ground is supplied to combination meter terminal 30 through body grounds M4, M66 and M147.
With power and ground supplied, the combination flasher unit controls the flashing of the hazard warning
lamps.
MULTI-REMOTE CONTROL SYSTEM OPERATIONNBEL0030S03Power is supplied at all times
Ithrough 15A fuse [No. 20, located in the fuse block (J/B)]
Ito multi-remote control relay terminals 1, 3 and 6.
Ground is supplied to multi-remote control relay terminal 2, when the multi-remote control system is triggered
through the smart entrance control unit.
Refer to ªMULTI-REMOTE CONTROL SYSTEMº, EL-270.
The multi-remote control relay is energized.
Power is supplied through terminal 7 of the multi-remote control relay
Ito front fog lamp LH (turn signal) terminal 2
Ito combination meter terminal 25
Ito rear combination lamp LH terminal 5.
Power is supplied through terminal 5 of the multi-remote control relay
Ito front fog lamp RH (turn signal) terminal 2
Ito combination meter terminal 29
Ito rear combination lamp RH terminal 5.
Ground is supplied to terminal 3 of each front fog lamp (turn signal) through body grounds E13 and E41.
Ground is supplied to terminal 6 of the rear combination lamp LH through body grounds B11, B22 and D210.
Ground is supplied to terminal 6 of the rear combination lamp RH through body grounds B55 and B75.
Ground is supplied to combination meter terminal 30 through body grounds M4, M66 and M147.
With power and ground supplied, the smart entrance control unit controls the flashing of the hazard warning
lamps.
TURN SIGNAL AND HAZARD WARNING LAMPS
System Description (Cont'd)
EL-76

Wiring Diagram Ð TURN ÐNBEL0032
MEL781L
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TURN SIGNAL AND HAZARD WARNING LAMPS
Wiring Diagram Ð TURN Ð
EL-77

MEL782L
TURN SIGNAL AND HAZARD WARNING LAMPS
Wiring Diagram Ð TURN Ð (Cont'd)
EL-78

Trouble DiagnosesNBEL0033
Symptom Possible cause Repair order
Turn signal and hazard warning
lamps do not operate.1. Hazard switch
2. Combination flasher unit
3. Open in combination flasher
unit circuit1. Check hazard switch.
2. Refer to combination flasher unit check.
3. Check wiring to combination flasher unit for open
circuit.
Turn signal lamps do not operate
but hazard warning lamps operate.1. 7.5A fuse
2. Hazard switch
3. Combination switch (turn signal)
4. Open in combination switch
(turn signal) circuit1. Check 7.5A fuse [No. 12, located in fuse block
(J/B)]. Turn ignition switch ON and verify battery
positive voltage is present at terminal 2 of hazard
switch.
2. Check hazard switch.
3. Check combination switch (turn signal).
4. Check the wire between combination flasher unit
terminal 3 and combination switch (turn signal) ter-
minal 1 for open circuit.
Hazard warning lamps do not oper-
ate but fog lamps (turn signal)
operate.1. 15A fuse
2. Hazard switch
3. Open in hazard switch circuit1. Check 15A fuse [No. 20, located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
3 of hazard switch.
2. Check hazard switch.
3. Check the wire between combination flasher unit
terminal 3 and hazard switch terminal 4 for open cir-
cuit.
Front fog lamp (turn signal) LH or
RH does not operate.1. Bulb
2. Grounds E13 and E41
3. Open in front fog lamp (turn sig-
nal) circuit1. Check bulb.
2. Check grounds E13 and E41.
3. Check harness between front fog lamp (turn signal)
and combination switch.
Rear combination lamp LH does
not operate.1. Bulb
2. Grounds B11, B22 and D210
3. Open in rear combination lamp
LH circuit1. Check bulb.
2. Check grounds B11, B22 and D210.
3. Check harness between rear combination lamp LH
and hazard switch.
Rear combination lamp RH does
not operate.1. Bulb
2. Grounds B55 and B75
3. Open in rear combination lamp
RH circuit1. Check bulb.
2. Check grounds B55 and B75.
3. Check harness between rear combination lamp RH
and hazard switch.
LH and RH turn indicators do not
operate.1. Ground 1. Check grounds M4, M66 and M147.
LH or RH turn indicator does not
operate.1. Bulb
2. Open in turn indicator circuit1. Check bulb in combination meter.
2. Check harness between combination meter and haz-
ard switch.
SEL122E
Electrical Components InspectionNBEL0034COMBINATION FLASHER UNIT CHECKNBEL0034S01IBefore checking, ensure that bulbs meet specifications.
IConnect a battery and test lamp to the combination flasher
unit, as shown. Combination flasher unit is properly function-
ing if it blinks when power is supplied to the circuit.
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TURN SIGNAL AND HAZARD WARNING LAMPS
Trouble Diagnoses
EL-79

SchematicNBEL0049
MEL794L
WARNING LAMPS
Schematic
EL-114

Wiring Diagram Ð WARN ÐNBEL0050
MEL795L
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WARNING LAMPS
Wiring Diagram Ð WARN Ð
EL-115

MEL796L
WARNING LAMPS
Wiring Diagram Ð WARN Ð (Cont'd)
EL-116