fuses INFINITI QX4 2005 Factory User Guide

REMOTE KEYLESS ENTRY SYSTEM
BL-59
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Revision: October 20052005 QX56
Trouble Diagnosis ProcedureEIS0 08 Q6
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to BL-45, "
System Description" .
3. Confirm system operation.

Check that the power door lock system operates normally. Refer to BL-16, "POWER DOOR LOCK
SYSTEM" .

Check that the automatic back door system operates normally. Refer to BL-99, "AUTOMATIC BACK
DOOR SYSTEM" .
4. Perform pre-diagnosis inspection. Refer to BL-59, "
BCM Power Supply and Ground Circuit Check" .
5. Refer to trouble diagnosis chart by symptom, repair or replace any malfunctioning parts. Refer to BL-60,
"Trouble Diagnoses" .
6. Inspection End.
BCM Power Supply and Ground Circuit CheckEIS0 08 Q7
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuses and fusible link.
NOTE:
Refer to BL-44, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connectors M18, M20 terminals
11, 38, 57, 70 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
Component Parts Terminal No. (SIGNAL) Ampere No. Location
BCM57 (BAT power supply) 15A 22 Fuse block (J/B)
70 (BAT power supply) 50AfFuse and fusible link box
11 (ACC power supply) 10A 4 Fuse block (J/B)
38 (IGN power supply) 10A 59 Fuse and relay box
ConnectorTerminals
Signal nameIgnition
switchVo l ta g e
(+) (–)
M2070
GroundBattery power
supplyOFFBattery
voltage
57Battery power
supplyOFFBattery
voltage
M1811ACC power
supplyACCBattery
voltage
38IGN power
supplyONBattery
voltage
WIIA0600E

BRC-60
[VDC/TCS/ABS]
TROUBLE DIAGNOSES FOR SYMPTOMS
Revision: October 20052005 QX56
ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned OnEFS004YE
1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) FUSES
Check 30A fusible link h and 40A fusible link i for ABS actuator and electric unit (control unit). For fusible link
layout, refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 2.
NG >> If fusible link is blown, be sure to eliminate cause of problem before replacing.
2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUITS
1. Disconnect ABS actuator and electric unit (control unit) connec-
tor.
2. Check voltage between ABS actuator and electric unit (control
unit) connector terminal 1 (Y) and ground and terminal 32 (B/Y)
and ground.
Does battery voltage exist?
YES >> GO TO 3.
NO >> Repair harness or connectors between fusible link and
ABS actuator and electric unit (control unit).
3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector terminal 16 (B) and ground and terminal 47 (B) and
ground.
Does continuity exist?
YES >> Replace ABS actuator and electric unit (control unit).
Refer to BRC-66, "
Removal and Installation" .
NO >> Repair harness or connectors between ABS actuator
and electric unit (control unit) and ground.
ABS Warning Lamp Stays On When Ignition Switch Is Turned OnEFS004YF
1. CARRY OUT SELF-DIAGNOSIS
Carry out self-diagnosis. Refer to BRC-29, "
SELF-DIAGNOSIS" .
Are malfunctions detected in self-diagnosis?
YES >> Refer to BRC-30, "Display Item List" .
NO >> Refer to DI-30, "
WARNING LAMPS" .
WFIA0199E
WFIA0196E

DI-18
COMBINATION METERS
Revision: October 20052005 QX56
Power Supply and Ground Circuit InspectionEKS00BC3
1. CHECK FUSES
Check for blown combination meter fuses.
Refer to DI-10, "Wiring Diagram — METER —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect combination meter connector.
2. Check voltage between combination meter harness connector
terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the harness for open between combination meter and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between combination meter harness connector ter-
minal and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Unit Power source Fuse No.
Combination meter Battery 19
Ignition switch ON or START 14
Ignition switch ACC or ON 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M241 (O)
Ground0VBattery
voltageBattery
voltage
8 (Y/R)Battery
voltageBattery
voltageBattery
voltage
24 (O/L) 0V 0VBattery
voltage
WKIA1815E
Te r m i n a l s
Continuity (+)
(–)
ConnectorTe r m i n a l
(Wire color)
M24 17 (B) Ground Yes
WKIA1526E

DI-82
REAR VIEW MONITOR
Revision: October 20052005 QX56
Power Supply and Ground Circuit InspectionEKS00BDM
1. CHECK FUSES
Check for blown rear view camera system fuses.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect rear view camera control unit connector.
2. Check voltage between rear view camera control unit and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between rear view camera control unit and fuse.
3. CHECK REAR VIEW CAMERA CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear view camera control unit harness
connector B73 terminal 3 (B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK REAR VIEW CAMERA GROUND CIRCUIT
1. Disconnect rear view camera connector.
2. Check continuity between rear view camera harness connector
D504 terminal 2 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Unit Power source Fuse No.
Rear view camera control unitBattery 31
Ignition switch ACC or ON 4
Te r m i n a l s
OFF ACC (+)
(–)
ConnectorTe r m i n a l
(Wire color)
B731 (Y) Ground Battery voltage Battery voltage
2 (V) Ground 0V Battery voltage
WKIA2027E
Continuity should exist.
SKIA5081E
Continuity should exist.
SKIA5082E

BASIC SERVICE PROCEDURE
EC-79
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Revision: October 20052005 QX56
Idle Mixture Ratio AdjustmentUBS00KZW
PREPARATION
1. Make sure that the following parts are in good order.

Battery

Ignition system

Engine oil and coolant levels

Fuses

ECM harness connector

Vacuum hoses

Air intake system
(Oil filler cap, oil level gauge, etc.)

Fuel pressure

Engine compression

Throttle valve

Evaporative emission system
2. On air conditioner equipped models, checks should be carried out while the air conditioner is OFF.
3. Checks should be carried out while selector lever is in P or N position.
4. When measuring CO percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5. Turn off headlamp, heater blower, rear window defogger.
6. Keep front wheels pointed straight ahead.

REAR WINDOW DEFOGGER
GW-77
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Revision: October 20052005 QX56
REAR WINDOW DEFOGGERPFP:25350
Component Parts and Harness Connector LocationEIS005YM
System DescriptionEIS005YN
The rear window defogger system is controlled by BCM (body control module) and IPDM E/R (intelligent
power distribution module engine room).
The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times

through 15A fuses (No. 43, 46, and 47 located in the IPDM E/R)

to rear window defogger relay and heated mirror relay (located in the IPDM E/R)

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.
With the ignition switch turned to ON or START position,
Power is supplied

through ignition switch

to rear window defogger relay (located in the IPDM E/R)

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38

through 10A fuse [No. 8, located in the fuse block (J/B)]

to front air control terminal 14.
Ground is supplied

to BCM terminal 67

to front air control terminal 1
LIIA1981E

REAR WINDOW DEFOGGER
GW-87
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Revision: October 20052005 QX56
BCM Power Supply and Ground Circuit CheckEIS005YW
1. CHECK FUSES AND FUSIBLE LINK

Check 10A fuse (No. 8, located in the fuse block (J/B)]

Check 10A fuse (No. 59, located in the fuse and relay box)

Check 50A fusible link (letter f located in the fuse and fusible link box)
NOTE:
Refer to GW-77, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector M18, M20 terminals 38, 70
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check continuity between BCM connector M20 terminal 67 and ground.
OK or NG
OK >> BCM power supply and ground circuit is OK.
NG >> Repair or replace harness.70 (W/B) - Ground : Battery voltage
38 (W/L) - Ground : Battery voltage
LIIA0914E
67 (B) - Ground : Continuity should exist.
LIIA0915E

REAR WINDOW DEFOGGER
GW-89
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Revision: October 20052005 QX56
3. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Turn ignition switch ON.
3. Check voltage between BCM connector M18 terminal 9 and
ground.
OK or NG
OK >> Replace front air control. Refer to ATC-147, "FRONT
AIR CONTROL" .
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installa-
tion of BCM" .
Rear Window Defogger Circuit CheckEIS0062Z
1. CHECK FUSE
Check if any of the following fuses for IPDM E/R are blown.
NOTE:
Refer to GW-77, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse, refer to GW-
77, "Component Parts and Harness Connector Location" .
2. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger connector D406 terminal + and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.9 (Y/B) - Ground : Approx. 5
WIIA0523E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R 15A 46
IPDM E/R 15A 47
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
D406 + (B) GroundRear window defogger
switch ON. Battery voltage
Rear window defogger
switch OFF.0
LIIA0655E

GW-90
REAR WINDOW DEFOGGER
Revision: October 20052005 QX56
3. CHECK REAR WINDOW DEFOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger connector D604 terminal - and ground.
OK or NG
OK >> Check filament. Refer to GW-94, "Filament Check" .

If filament is OK.
Check the condition of the harness and the connector.

If filament is NG.
Repair filament.
NG >> Repair or replace harness.
4. CHECK REAR WINDOW DEFOGGER RELAY OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IPDM E/R connector E124 terminal 60 and ground.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> Repair or replace harness.
Door Mirror Defogger Power Supply Circuit CheckEIS005Z0
1. CHECK FUSE
Check if any of the following fuses for fuse block (J/B) are blown.
NOTE:
Refer to GW-77, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to
GW-77, "
Component Parts and Harness Connector Location" . - (B) - Ground : Continuity should exist.
LIIA0409E
ConnectorTerminal (Wire color)
ConditionVoltage (V)
(Approx.)
(+) (–)
E124 60 (B) GroundRear window defogger
switch ON. Battery voltage
Rear window defogger
switch OFF.0
WIIA0525E
COMPONENT PARTS AMPERE FUSE NO.
IPDM E/R 15A 43

HEADLAMP (FOR USA)
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Revision: October 20052005 QX56
Terminals and Reference Values for IPDM E/REKS00B7Y
How to Proceed With Trouble DiagnosisEKS00B7Z
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 6 , "
System Description" .
3. Perform the Preliminary Check. Refer to LT- 1 5 , "
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 CheckEKS00B80
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
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
Te r m i n a l
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 — — —
52 L Headlamp low (LH) ONLighting switch
2ND positionOFF 0V
ON Battery voltage
54 R/Y Headlamp low (RH) ONLighting switch
2ND positionOFF 0V
ON Battery voltage
55 G Headlamp high (LH) ONLighting switch
HIGH or PASS
positionOFF 0V
ON Battery voltage
56 L/W Headlamp high (RH) ONLighting switch
HIGH or PASS
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