2005 INFINITI QX4 fuse diagram

LT-4
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS00B7P
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NIN G:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
General precautions for service operationsEKS00B7Q

Never work with wet hands.

Xenon headlamp includes high voltage generating part. Be sure
to disconnect battery negative cable (negative terminal) or
power fuse before removing, installing, or touching the xenon
headlamp (including lamp bulb).

Turn the lighting switch OFF before disconnecting and connect-
ing the connector.

When turning the xenon headlamp on and while it is illuminated,
never touch the harness, bulb, and socket of the headlamp.

When checking the headlamp on/off operation, check it on vehi-
cle and with the power connected to the vehicle-side connector.

Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not
touch the headlamp bulb just after the headlamp is turned off, because it is very hot.

Install the xenon headlamp bulb socket correctly. If it is installed
improperly, high-voltage leak or corona discharge may occur
that can melt the bulb, connector, and housing. Do not illuminate
the xenon headlamp bulb out of the headlamp housing. Doing
so can cause fire and harm your eyes.

When the bulb has burned out, wrap it in a thick vinyl bag and
discard. Do not break the bulb.

Leaving the bulb removed from the headlamp housing for a long
period of time can deteriorate the performance of the lens and
reflector (dirt, clouding). Always prepare a new bulb and have it
on hand when replacing the bulb.

Do not use organic solvent (paint thinner or gasoline) to clean
lamps and to remove old sealant.
Wiring Diagrams and Trouble DiagnosisEKS00B7R
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" in GI section.

Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution in PG section.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
WKIA0460E
EL-3422D

LT-16
HEADLAMP (FOR USA)
Revision: October 20052005 QX56
Refer to LT- 1 0 , "Wiring Diagram — H/LAMP —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fus-
ible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> Inspection End.
NG >> Check ground circuit harness.
IPDM E/R Battery34
35
40
41
53 Unit Power source Fuse and fusible link No.
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M18 38 (W/L)
Ground0V 0VBattery
voltage
M20 70 (W/B)Battery
voltageBattery
voltageBattery
voltage
WKIA1436E
Te r m i n a l s
Continuity
ConnectorTe r m i n a l
(Wire color)
M20 67 (B) Ground Yes
LIIA0915E

LT-42
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
Revision: October 20052005 QX56
How to Proceed With Trouble DiagnosisEKS00B8J
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-34, "
System Description" .
3. Perform the Preliminary Check. Refer to LT-42, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckEKS00B8K
CHECK BCM CONFIGURATION
1. CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-14, "
READ CONFIGURATION PROCE-
DURE" .
OK or NG
OK >> Continue preliminary check. Refer to LT- 4 2 , "INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT" .
NG >> Change BCM configuration for "DTRL" to "WITH". Refer to BCS-16, "
WRITE CONFIGURATION
PROCEDURE" .
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES AND FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 3 7 , "
Wiring Diagram — DTRL —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 L CAN-H — — —
40 P CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible link) OFF — Battery voltage Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
Daytime light relay Battery 45

AUTO LIGHT SYSTEM
LT-55
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56
1 USA
2 Canada
How to Proceed With Trouble DiagnosisEKS00B8Z
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 4 8 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT- 5 5 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction. Refer to LT- 6 2 , "
Trouble Diagnosis Chart
by Symptom" .
5. Does the auto light system operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckEKS00B90
SETTING CHANGE FUNCTIONS

Sensitivity of auto light system can be adjusted using CONSULT-II. Refer to LT-58, "WORK SUPPORT" .
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 5 0 , "
Wiring Diagram — AUTO/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
56L/W1
Y2Headlamp high (RH) ONLighting switch
HIGH or PASS
positionOFF 0V
ON Battery voltage
57 R/LParking, license, and tail
lampONLighting switch
1ST positionOFF 0V
ON Battery voltage
59 B Ground ON — 0V Te r m i n a l
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
IPDM E/R Battery34
35
37
40
41
53

FRONT FOG LAMP
LT-75
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56
Preliminary CheckEKS00B9I
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 7 1 , "
Wiring Diagram — F/FOG —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fus-
ible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> Inspection End.
NG >> Check ground circuit harness.
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
IPDM E/RBattery 53
Battery (Fog lamps ON) 56
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
M18 38 (W/L)
Ground0V 0VBattery
voltage
M20 70 (W/B)Battery
voltageBattery
voltageBattery
voltage
WKIA1436E
Terminals
Continuity
ConnectorTe r m i n a l
(Wire color)
M20 67 (B) Ground Yes
LIIA0915E

TURN SIGNAL AND HAZARD WARNING LAMPS
LT-87
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56
Preliminary CheckEKS00B9V
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 8 3 , "
Wiring Diagram — TURN —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fus-
ible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> Inspection End.
NG >> Check ground circuit harness.
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTerminal
(Wire color)
M18 38 (W/L)
Ground0V 0VBattery
voltage
M20 70 (W/B)Battery
voltageBattery
voltageBattery
voltage
WKIA1436E
Terminals
Continuity
ConnectorTe r m i n a l
(Wire color)
M20 67 (B) Ground Yes
LIIA0915E

PARKING, LICENSE PLATE AND TAIL LAMPS
LT-115
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56
Terminals and Reference Values for IPDM E/REKS00BAQ
How to Proceed With Trouble DiagnosisEKS00BAR
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 1 0 8 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT- 11 5 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do the parking, license and tail lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckEKS00BAS
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 111 , "
Wiring Diagram — TAIL/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 L CAN-H — — —
40 P CAN-L — — —
67 B Ground ON — 0V
70 W/B Battery power supply (fusible link) OFF — Battery voltage Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
SKIA5292E
Terminal
No.Wire
colorSignal nameMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
38 B Ground ON — 0V
39 L CAN-H — — —
40 P CAN-L — — —
57 R/LParking, license, and tail
lampONLighting switch
1ST positionOFF 0V
ON Battery voltage
59 B Ground ON — 0V
Unit Power source Fuse and fusible link No.
BCMBattery f
Ignition switch ON or START position 59
IPDM E/RBattery 53
Battery (Tail lamps ON) 37

INTERIOR ROOM LAMP
LT-143
C
D
E
F
G
H
I
J
L
MA
B
LT
Revision: October 20052005 QX56
How to Proceed With Trouble DiagnosisEKS00BBA
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 1 3 0 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT-143, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the interior room lamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckEKS00BBB
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown BCM fuses or fusible link.
Refer to LT-135, "
Wiring Diagram — INT/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse or fusible link.
3. CHECK GROUND CIRCUIT
Check continuity between BCM and ground.
OK or NG
OK >> Inspection End.
NG >> Check harness ground circuit.
Unit Power source Fuse and fusible link No.
BCMBatteryf
22
Ignition switch ON or START position 59
Terminals Ignition switch position
(+)
(–) OFF ON
ConnectorTerminal
(Wire color)
M2057 (Y/R)
GroundBattery voltage Battery voltage
70 (W/B) Battery voltage Battery voltage
M18 38 (W/L) 0V Battery voltage
WKIA1478E
Terminals
Continuity
ConnectorTe r m i n a l
(Wire color)
M20 67 (B) Ground Yes
LIIA0915E