2005 INFINITI QX4 fuse

HOMELINK UNIVERSAL TRANSCEIVER
BL-157
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
Trouble DiagnosesEIS008SD
DIAGNOSTIC PROCEDURE
SYMPTOM: Transmitter does not activate receiver.
Before conducting the procedure given below, make sure that system receiver (garage door opener, etc.)
operates with original, hand-held transmitter. If NG, receiver or hand-held transmitter is malfunctioning, not
vehicle related.
1. ILLUMINATE CHECK

Turn ignition switch OFF.

Does amber light (LED) of transmitter illuminate when any but-
ton is pressed?
YES or NO
YES >> GO TO 2.
NO >> GO TO 3.
2. TRANSMITTER CHECK
Check transmitter with Tool.*
*For details, refer to Technical Service Bulletin.
OK or NG
OK >> Receiver or hand-held transmitter malfunction, not vehicle related.
NG >> Replace transmitter.
3. POWER SUPPLY CHECK
1. Disconnect transmitter.
2. Check voltage between Homelink® universal transceiver connector R106 terminal 1 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace fuse or harness.
LIIA1466E
1 - Ground : Battery voltage
LIIA1467E

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-6
COMBINATION METERS
Revision: October 20052005 QX56
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]

to combination meter terminal 8.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No.14, located in the fuse block (J/B)]

to combination meter terminal 24.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No.4, located in the fuse block (J/B)]

to combination meter terminal 1.
Ground is supplied

to combination meter terminal 17

through body grounds M57, M61 and M79.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.
ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
The engine oil pressure gauge is regulated by the unified meter control unit and input from the oil pressure
sensor.
A/T OIL TEMPERATURE GAUGE
The A/T oil temperature gauge indicates the A/T fluid temperature.
TCM (transmission control module) provides an A/T fluid temperature signal to combination meter via CAN
communication lines.
V O LTA G E G A U G E
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied

to combination meter terminal 15

through fuel level sensor unit and fuel pump terminal 2

through fuel level sensor unit and fuel pump terminal 5

from combination meter terminal 16.
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-5, "CAN COMMUNICATION" .

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-28
COMPASS AND THERMOMETER
Revision: October 20052005 QX56
Trouble DiagnosesEKS00BCG
PRELIMINARY CHECK FOR THERMOMETER
1. COOL DOWN CHECK
1. Turn the ignition switch to the ON position.
2. Cool down the ambient sensor 2 with water or ice.
Does the indicated temperature drop?
YES >> GO TO 2.
NO >> The system is malfunctioning. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER"
.
2. WARM UP CHECK
1. Leave the vehicle for 10 minutes.
2. With the ignition switch in the ON position, disconnect and reconnect the ambient sensor 2 connector.
Does the indicated temperature rise?
YES >> The system is OK.
NO >> The system is malfunctioning. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER"
.
NOTE:
The indicated temperature on the thermometer is not readily affected by engine heat. It changes only when
one of the following conditions is present.

The temperature detected by the ambient sensor is lower than the indicated temperature on the thermom-
eter.

The vehicle speed is greater than 20 km/h (13 MPH).
(This is to prevent the indicated temperature from being affected by engine heat during low-speed driv-
ing.)

The ignition switch has been turned to the OFF position for more than 2 hours. (The engine is cold.)
INSPECTION/COMPASS AND THERMOMETER
Symptom Possible causes Repair order
No display at all 1. 10A fuse
2. Ground circuit
3. Compass and thermometer1. Check 10A fuse [No. 12, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive volt-
age is at terminal 2 of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indi-
cation slips off the mark
or incorrect.1. In manual correction mode (Bar and
display vanish)
2. Zone variation change is not done1. Drive the vehicle and turn at an angle of 90°.
2. Perform the zone variation change.
Compass reading
remains unchanged.1. Vehicle speed signal is not entered
2. Compass and thermometer1. Check harness for open or short between combination meter
terminal 29 and compass and thermometer terminal 8.
2. Replace compass and thermometer.
Displays wrong tem-
perature when ambient
temperature is between
−40°C (−40°F) and
55°C (130°F). (See
NOTE above.)1. Check operation
2. Ambient sensor circuit
3. Vehicle speed signal is not entered
4. Ambient sensor 2
5. Compass and thermometer1. Perform preliminary check shown above.
2. Check harness for open or short between ambient sensor 2 and
compass and thermometer.
3. Check harness for open or short between combination meter
terminal 29 and compass and thermometer terminal 8.
4. Replace ambient sensor 2.
5. Replace compass and thermometer.
Displays SC or OC. 1. Ambient sensor circuit
2. Ambient sensor 2
3. Compass and thermometer1. Check harness for open or short between ambient sensor 2 and
compass and thermometer.
2. Replace ambient sensor 2.
3. Replace compass and thermometer.

DI-42
WARNING CHIME
Revision: October 20052005 QX56
WARNING CHIMEPFP:24814
Component Parts and Harness Connector LocationEKS00BCO
System DescriptionEKS00BCP
FUNCTION
Power is supplied at all times

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

to BCM terminal 70, and

through 10A fuse [No. 19, located in the fuse block (J/B)]

to key switch and key lock solenoid terminal 3.
With ignition switch in ON or START position, power is supplied

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

to BCM terminal 38.
Ground is supplied

to BCM terminal 67

through body grounds M57, M61, and M79.
NOTE:
When ignition key warning chime, light warning chime, and seat belt warning chime are required at the same
time, the priorities for each chime are the following.
1. Light warning chime
2. Ignition key warning chime
1. Combination meter M24 2. Combination switch (lighting switch)
M283. Steering column (view with instru-
ment lower panel LH removed)
4. BCM M18, M19, M20 5. Front door switch LH B8 6. Key switch and key lock solenoid
M27
7. Seat belt buckle pre-tensioner
assembly (seat belt buckle switch)
LH B74
LKIA0692E

WARNING CHIME
DI-47
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: October 20052005 QX56
Terminals and Reference Value for Combination MeterEKS00BCT
How to Proceed With Trouble DiagnosisEKS00BCU
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-42, "
System Description" .
3. Perform the preliminary check. Refer to DI-47, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS00BCV
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-44, "Wiring Diagram — CHIME —" .
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" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 L CAN-H — — —
40 P CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
SKIA5292E
Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 L C A N - H — — —
12 P CAN-L — — —
27 O/BSeat belt buckle pre-ten-
sioner assembly (seat belt
buckle switch) LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-48
WARNING CHIME
Revision: October 20052005 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors M18 and M20.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M20 terminal
67 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Terminals Ignition switch position
(+)
(–) OFF ON
ConnectorTerminal (Wire
color)
M20 70 (W/B)
GroundBattery volt-
ageBattery volt-
age
M18 38 (W/L) 0VBattery volt-
age
WKIA2072E
Continuity should exist.
LIIA0915E