turn signal INFINITI QX4 2001 Factory Service Manual

4 CHECK REAR WINDOW DEFOGGER INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Stop engine.
2. Disconnect ECM harness connector.
3. Disconnect rear window defogger relay.
4. Check harness continuity between ECM terminal 52 and rear window defogger relay terminals 7.
SEF031Z
5. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors E1, M1
IHarness connectors M33, F22
IDiode M37
IHarness for open and short between ECM and rear window defigger relay
©Repair open circuit or short to ground or short to power in harness or connectors.
6 CHECK INTERMITTENT INCIDENT
Perform ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-140.
©INSPECTION END
7 CHECK HEADLAMP FUNCTION
1. Start engine.
2. Turn the lighting switch ªONº at 1st position with high beam.
3. Check that headlamps are illuminated.
OK or NG
OK©GO TO 8.
NG©Refer to EL-60, ªHEADLAMP (FOR USA)º or EL-123, ªHEADLAMP (FOR CANADA) Ð
DAYTIME LIGHT SYSTEMº.
ELECTRICAL LOAD SIGNAL
Diagnostic Procedure (Cont'd)
EC-646

ELECTRICAL SYSTEM
SECTION
EL
CONTENTS
PRECAUTIONS...............................................................4
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............4
Wiring Diagrams and Trouble Diagnosis .....................4
HARNESS CONNECTOR................................................5
Description ...................................................................5
STANDARDIZED RELAY................................................7
Description ...................................................................7
POWER SUPPLY ROUTING...........................................9
Schematic ....................................................................9
Wiring Diagram - POWER - ......................................10
Inspection...................................................................16
GROUND........................................................................17
Ground Distribution ....................................................17
COMBINATION SWITCH..............................................28
Check .........................................................................28
Replacement ..............................................................29
STEERING SWITCH......................................................30
Check .........................................................................30
HEADLAMP (FOR USA) - XENON TYPE -..................31
Component Parts and Harness Connector
Location .....................................................................31
System Description ....................................................31
Schematic ..................................................................35
Wiring Diagram - H/LAMP -.......................................36
Trouble Diagnoses.....................................................40
Bulb Replacement/Xenon Type .................................43
Aiming Adjustment .....................................................44
HEADLAMP (FOR CANADA) - DAYTIME LIGHT
SYSTEM -......................................................................46
Component Parts and Harness Connector
Location .....................................................................46
System Description ....................................................46
Schematic ..................................................................50
Wiring Diagram - DTRL - ...........................................51
Trouble Diagnoses.....................................................56
Bulb Replacement .....................................................57
Aiming Adjustment .....................................................58
HEADLAMP - HEADLAMP AIMING CONTROL -........59System Description ....................................................59
Wiring Diagram - H/AIM - ..........................................60
PARKING, LICENSE AND TAIL LAMPS.....................61
System Description ....................................................61
Schematic ..................................................................62
Wiring Diagram - TAIL/L - ..........................................63
Trouble Diagnoses.....................................................66
STOP LAMP..................................................................67
Wiring Diagram - STOP/L - .......................................67
BACK-UP LAMP............................................................69
Wiring Diagram - BACK/L - .......................................69
FRONT FOG LAMP.......................................................70
System Description ....................................................70
Wiring Diagram - F/FOG - .........................................72
Aiming Adjustment .....................................................74
TURN SIGNAL AND HAZARD WARNING LAMPS.....75
System Description ....................................................75
Wiring Diagram - TURN - ..........................................77
Trouble Diagnoses.....................................................79
Electrical Components Inspection .............................79
ILLUMINATION..............................................................80
System Description ....................................................80
Schematic ..................................................................82
Wiring Diagram - ILL - ...............................................83
INTERIOR, SPOT, VANITY MIRROR AND
LUGGAGE ROOM LAMPS...........................................88
System Description ....................................................88
Schematic ..................................................................90
Wiring Diagram - INT/L - ...........................................91
METERS AND GAUGES...............................................94
Component Parts and Harness Connector
Location .....................................................................94
System Description ....................................................94
Combination Meter ....................................................96
Schematic ..................................................................98
Wiring Diagram - METER - .......................................99
Meter/Gauge Operation and Odo/Trip Meter
Segment Check in Diagnosis Mode ........................100
Trouble Diagnoses...................................................101
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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)]
Ground is supplied
Ito headlamp battery saver control unit terminals 4 and 11
Ithrough body grounds M77 and M111, and M4,M66 and M147
Ito auto light control unit terminal 5
Ithrough body grounds M4, M66 and M147.
Power Supply to Low Beam and High BeamNBEL0188S0101When 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 terminals 3 and 9,
Ifrom lighting switch terminal 12.
Headlamp relays (LH and RH) are energized and then power is supplied to headlamps (LH and RH).
LOW BEAM OPERATIONNBEL0188S02When the lighting switch is turned to the 2ND position and placed in LOW (ªBº) position, 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 headlamp(s) will illuminate.
HIGH BEAM OPERATION/FLASH-TO-PASS OPERATIONNBEL0188S03When the lighting switch is turned to the 2ND position and placed in HIGH (ªAº) position or PASS (ªCº) position,
power is supplied
Ifrom terminal 5 of headlamp LH relay
Ito terminal 1 of headlamp LH, and
Ito combination meter terminal 26 for the HIGH BEAM indicator
Ifrom terminal 5 of headlamp RH relay
Ito terminal 1 of headlamp RH.
Ground is supplied
Ito headlamp LH terminal 2
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 headlamp RH terminal 2
Ithrough lighting switch terminals 9 and 8
Ithrough body grounds E13 and E41.
With power and ground supplied, the high beams and the high beam indicator illuminate.
BATTERY SAVER CONTROLNBEL0188S04When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps illuminate,
the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart entrance con-
trol 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 the headlamp LH and RH relay from headlamp battery saver
control unit terminals 2 and 8 is terminated.
Then the headlamps are turned off.
The headlamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after 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 supplied
HEADLAMP (FOR USA) Ð XENON TYPE Ð
System Description (Cont'd)
EL-32

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

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

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

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

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