fuse box INFINITI QX4 2005 Factory Service Manual

TROUBLE DIAGNOSIS
ATC-63
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1. CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL
1. Disconnect front air control connector.
2. Check voltage between front air control harness connector M49
terminals 14 (Y/G) and 22 (Y/R), and ground.
OK or NG
OK >> GO TO 2.
NG >> Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to PG-76, "
FUSE BLOCK-
JUNCTION BOX(J/B)" .

If fuses are OK, check harness for open circuit. Repair or replace as necessary.

If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-
sary.
2. CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Check continuity between front air control harness connector
M49 terminal 1 (B) and ground.
OK or NG
OK >> Replace front air control. Refer to ATC-147, "FRONT
AIR CONTROL" .
NG >> Repair harness or connector.
Terminals Ignition switch position
(+)
(-) OFF ACC ON Front air
control
connectorTe r m i n a l N o .
(Wire color)
M49 14 (Y/G)
GroundApprox. 0V Approx. 0VBattery
voltage
M49 22 (Y/R)Battery
voltageBattery
voltageBattery
voltage
WJIA0415E
1 - Ground : Continuity should exist.
WJIA1351E

ATC-96
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
1. CHECK FUSES
Check 20A fuses [No. 24 and 27 (Located in the fuse and fusible link box)]. For fuse layout. Refer to PG-77,
"FUSE AND FUSIBLE LINK BOX" .
OK or NG
OK >> GO TO 2.
NG >> GO TO 10.
2. CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector.
3. Turn ignition switch ON.
4. Press the mode switch to select any mode except off.
5. Turn the front blower control dial to high.
6. Check voltage between front blower motor harness connector
M62 terminal 2 (W/L) and ground.
OK or NG
OK >> GO TO 12.
NG >> GO TO 3.
3. CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front blower motor relay.
3. Turn ignition switch ON.
4. Check voltage between front blower motor relay harness con-
nector M107 terminals 5 (G/R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK FRONT BLOWER MOTOR RELAY
Turn ignition switch OFF.
Refer to ATC-100, "
Front Blower Motor Relay" .
OK or NG
OK >> GO TO 5.
NG >> Replace front blower motor relay.Fuses are good.
2 - Ground : Battery voltage.
WJIA1331E
5 - Ground : Battery voltage.
WJIA1359E

TROUBLE DIAGNOSIS
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1. DIAGNOSTIC PROCEDURE
Blower motor rotates normally at each speed.
OK or NG
OK >> Inspection End.
NG >> 1. Does not rotate at any speed, GO TO 2.
2. Does not rotate at 1 - 3 speed, GO TO 13.
3. Does not rotate at 4 speed, GO TO 18.
2. CHECK FUSES
Check 15A fuses [Nos. 10 and 11, located in the fuse block (J/B)]. Refer to PG-76, "
FUSE BLOCK-JUNCTION
BOX(J/B)" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 8.
3. CHECK REAR BLOWER MOTOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear blower motor connector.
3. Select any rear blower speed except OFF.
4. Turn ignition switch ON.
5. Check voltage between rear blower motor harness connector
B134 terminal 2 (L/R) and ground.
OK or NG
OK >> GO TO 11.
NG >> GO TO 4.
4. CHECK REAR BLOWER MOTOR RELAY
Turn ignition switch OFF.
Refer to AT C - 11 0 , "
Rear Blower Motor Relay" .
OK or NG
OK >> GO TO 5.
NG >> Replace rear blower motor relay.
5. CHECK REAR BLOWER MOTOR POWER FROM RELAY TO REAR BLOWER MOTOR
1. Reconnect rear blower motor connector.
2. Disconnect rear blower motor relay J-1.
3. Turn ignition switch ON.
4. Set rear blower switch (front) to any position except OFF, REAR,
or 4 - speed.
5. Momentarily (no more than 4 seconds), connect a jumper wire
between rear blower motor relay connector J-1 (harness side)
terminals 3 and 5.
OK or NG
OK >> GO TO 6.
NG >> GO TO 10.2 - Ground : Battery voltage.
WJIA0596E
Rear blower motor should rotate.WJIA2002E

ATC-106
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
6. CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) connector.
3. Turn ignition switch ON.
4. Set rear blower switch (front) to any position except OFF, REAR,
or 4 - speed.
5. Check voltage between fuse block (J/B) harness connector M39
terminal 3Q (W/L) and ground.
OK or NG
OK >> GO TO 7.
NG >> GO TO 20.
7. CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between fuse block (J/B) harness connector
M3 terminal 7N (B) and ground.
OK or NG
OK >> Replace fuse block (J/B).
NG >> Repair harness or connector.
8. REPLACE FUSE
Refer to PG-76, "
FUSE BLOCK-JUNCTION BOX(J/B)"
Fuse should not open when rear blower motor is activated.
OK or NG
OK >> Inspection End.
NG >> GO TO 9.
9. CHECK REAR BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect battery cables and rear blower motor connector.
3. Check continuity between rear blower motor harness connector
B134 terminal 2 (L/R) and ground.
OK or NG
OK >> Check rear blower motor. Refer to ATC-100, "Front
Blower Motor" .
NG >> Repair harness or connector. 3Q - Ground : Battery voltage.
LJIA0101E
7N - Ground : Continuity should exist.
WJIA0597E
2 - Ground : Continuity should not exist.
WJIA0598E

AUDIO
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System DescriptionEKS00BI8
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse [No. 17, located in the fuse block (J/B)]

to subwoofer terminal 6

through 20A fuse [No. 31, located in the fuse and fusible link box]

to audio unit terminal 6

to BOSE speaker amp. terminal 1

to AV switch terminal 1 and

to display control unit terminal 1.
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 audio unit terminal 10 and

to AV switch terminal 2 and

to display control unit terminal 10.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 12, located in the fuse block (J/B)]

to display control unit terminal 12.
Ground is supplied through the case of the audio unit.
Ground is also supplied

to subwoofer terminal 5

through body grounds B7 and B19 and

to BOSE speaker amp. terminal 17

to AV switch terminal 5 and

to display unit terminal 1 and

to display control unit terminal 3

through body grounds M57, M61 and M79.
Then audio signals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16

to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29 and 30.
Audio signals are amplified by the BOSE speaker amp.
The amplified audio signals are supplied

through BOSE speaker amp. terminals 2, 3, 9,10,11,12, 13, 14, 15, 16, 18 and 19

to terminals + and - of front door speaker LH and RH and

to terminals + and - of front tweeter LH and RH and

to terminals + and - of center speaker and

to terminals + and - of rear door speaker LH and RH and

to terminals + and - of rear door tweeter LH and RH and

to terminals 1 and 2 of subwoofer.
When one of steering wheel audio control switches is pushed, the resistance in steering switch circuit changes
depending on which button is pushed.
REAR AUDIO REMOTE CONTROL UNIT
Power is supplied

from audio unit terminal 32

to rear audio remote control unit terminal 13.
Ground is supplied

to rear audio remote control unit terminal 15

through body grounds B117 and B132.
Audio signals are supplied

AV-8
AUDIO
Revision: October 20052005 QX56

through audio unit terminals 26, 27, 28 and 29

to terminals 1, 2, 3, and 4 of rear audio remote control unit.
SATELLITE RADIO TUNER (PRE-WIRING)
The satellite radio tuner pre-wiring allows connection of a satellite radio tuner.
Power is supplied at all times

through 20A fuse [No. 31, located in the fuse and fusible link box]

to satellite radio tuner pre-wiring terminal 32.
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 satellite radio tuner pre-wiring terminal 36.
Ground is supplied through the case of the satellite radio tuner.
Then audio signals are supplied

through satellite radio tuner pre-wiring terminals 21, 22, 23 and 24

to audio unit terminals 41, 42, 43 and 44.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control
level can be selected by the customer. Refer to Owner's Manual for operating instructions.

DVD ENTERTAINMENT SYSTEM
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Revision: October 20052005 QX56
System DescriptionEKS00BJ6
Refer to Owner's Manual for DVD entertainment system operating instructions.
Power is supplied at all times

through 20A fuse (No. 31, located in the fuse and fusible link box)

to DVD player terminal 16.
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 DVD player terminal 15.
Power is also supplied

from DVD player terminals 31 and 32

to video monitor terminals 11 and 12.
Ground is supplied

to DVD player terminal 22

through body grounds M57, M61 and M79.
Audio signals are supplied

through DVD player terminals 1, 2, 3 and 4

to audio unit terminals 34, 35, 36 and 37.
Video signals are supplied

through DVD player terminals 23, 24, 28 and 29

to video monitor terminals 5, 6, 7 and 8.

POWER DOOR LOCK SYSTEM
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System DescriptionEIS008PF
Power is supplied at all times

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

to BCM terminal 70

through 15A fuse [No. 22, located in the fuse block (J/B)]

to BCM terminal 57

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

to key switch and key lock solenoid terminal 3.
With ignition key inserted, power is supplied

through key switch and key lock solenoid terminal 4

to BCM terminal 37.
Ground is supplied to terminal 67 of BCM through body grounds M57, M61 and M79.
When the door is locked or unlocked with main power window and door lock/unlock switch, ground is supplied

to CPU of main power window and door lock/unlock switch

through main power window and door lock/unlock switch terminal 17

through grounds M57, M61 and M79.
Then main power window and door lock/unlock switch operation signal is supplied

to BCM terminal 22

through main power window and door lock/unlock switch terminal 14.
When the door is locked or unlocked with power window and door lock/unlock switch RH, ground is supplied

to CPU of power window and door lock/unlock switch RH

through power window and door lock/unlock switch RH terminal 11

through grounds M57, M61 and M79.
Then power window and door lock/unlock switch RH operation signal is supplied

to BCM terminal 22

through power window and door lock/unlock switch RH terminal 16.
When the door is locked with front door lock assembly LH (key cylinder switch), ground is supplied

to main power window and door lock/unlock switch terminal 4

through front door lock assembly LH (key cylinder switch) terminals 1 and 5

through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied

to BCM terminal 22

through main power window and door lock/unlock switch terminal 14.
When the door is unlocked with front door lock assembly LH (key cylinder switch), ground is supplied

to main power window and door lock/unlock switch terminal 6

through front door lock assembly LH (key cylinder switch) terminals 6 and 5

through grounds M57, M61 and M79.
Then front door lock assembly LH (key cylinder switch) operation signal is supplied

to BCM terminal 22

through main power window and door lock/unlock switch terminal 14.
BCM is connected to main power window and door lock/unlock switch and power window and door lock/unlock
switch RH through a bus.
When the front door switch LH is ON (door is open), ground is supplied

to BCM terminal 47

through front door switch LH terminal 2

through front door switch LH case ground.
When the front door switch RH is ON (door is open), ground is supplied

to BCM terminal 12

through front door switch RH terminal 2

POWER DOOR LOCK SYSTEM
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Trouble Diagnoses Symptom ChartEIS008PL
BCM Power Supply and Ground Circuit CheckEIS008PM
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuse and fusible link.
NOTE:
Refer to BL-99, "
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" .
Symptom Repair order Refer to page
Key reminder door function does not operate
properly.1. Door switch checkBL-31
2. Key switch (insert) checkBL-33
3. Replace BCM.BCS-20
Power door lock does not operate with door lock
and unlock switch on main power window and
door lock/unlock switch or power window and
door lock/unlock switch RH.1. Door lock/unlock switch checkBL-34
2. Replace BCM.BCS-20
Front door lock assembly LH (actuator) does not
operate.1. Front door lock assembly LH (Actuator) checkBL-38
Specific door lock actuator does not operate.1. Front door lock actuator RH checkBL-392. Rear door lock actuator RH/LH checkBL-40
3. Back doorBL-99
Power door lock does not operate with front door
key cylinder LH operation.1. Front door lock assembly LH (key cylinder
switch) checkBL-42
2. Replace BCM.BCS-20
Power door lock does not operate.1. BCM power supply and ground circuit checkBL-292. Door lock/unlock switch checkBL-34
Back door opener does not operate.1. Back door power supply and ground circuit
inspectionBL-1152. Door switch checkBL-31
3. Power liftgate switch system inspectionBL-116
Glass hatch lock actuator does not operate.1. Glass hatch switch checkBL-362. Glass hatch lock actuator checkBL-41
3. Replace BCM.BCS-20
Component Parts Terminal No. (SIGNAL) Ampere No. Location
BCM 57 (BAT power supply) 15A 22 Fuse block (J/B)
BCM 70 (BAT power supply) 50AfFuse and fusible link box

REMOTE KEYLESS ENTRY SYSTEM
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Revision: October 20052005 QX56
System DescriptionEIS008PX
INPUTS
Power is supplied at all times

to BCM terminal 70

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

to BCM terminal 57

through 15A fuse [No. 22, located in the fuse block (J/B)].
When the key is inserted in the key switch and key lock solenoid, power is supplied

to BCM terminal 37

through key switch and key lock solenoid terminals 3 and 4

through 10A fuse [No. 19, located in the fuse block (J/B)].
When the ignition switch is ACC or ON, power is supplied

to BCM terminal 11

through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is ON or START, power is supplied

to BCM terminal 38

through 10A fuse (No. 59, located in the fuse and relay box).
When the front door switch LH is ON (door is OPEN), ground is supplied

to BCM terminal 47

through front door switch LH terminal 2

through front door switch LH case ground.
When the front door switch RH is ON (door is OPEN), ground is supplied

to BCM terminal 12

through front door switch RH terminal 2

through front door switch RH case ground.
When the rear door switch LH is ON (door is OPEN), ground is supplied

to BCM terminal 48

through rear door switch LH terminal 2

through rear door switch LH case ground.
When the rear door switch RH is ON (door is OPEN), ground is supplied

to BCM terminal 13

through rear door switch RH terminal 2

through rear door switch RH case ground.
When the back door latch (door ajar switch) is ON (door is OPEN), ground is supplied

to BCM terminal 43

through back door latch (door ajar switch) terminal 7,

through back door latch (door ajar switch) terminal 8,

through body grounds B7 and B19.
Keyfob signal is input into the BCM from the remote keyless entry receiver.
The remote keyless entry system controls operation of the

power door lock

back door opener

interior lamp and step lamps

panic alarm

hazard and horn reminder

keyless power window down (open)

auto door lock operation