2004 INFINITI QX56 fuse

NAVIGATION SYSTEM
AV-123
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Revision: August 20072004 QX56
Illumination Signal Check for NAVI Control UnitEKS007M5
1. CHECK ILLUMINATION SIGNAL
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal
and Installation of NAVI Control Unit" .
NG >> Check harness for open or short between NAVI control unit and IPDM E/R.
Illumination Signal Check for Display Control Unit EKS007M6
1. CHECK ILLUMINATION SIGNAL
1. Turn ignition switch ON.
2. Check voltage between display control unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-158, "Removal
and Installation of Display Control Unit" .
NG >> Check harness for open or short between display control unit and IPDM E/R.
Ignition Signal Check for NAVI Control UnitEKS007M7
1. CHECK IGNITION SIGNAL
1. Disconnect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector
B152 terminal 26 (G/R) and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-157, "Removal
and Installation of NAVI Control Unit" .
NG >> Check harness for open or short between NAVI control
unit and fuse.
Te r m i n a l s
Lighting switch position
(+)
(–)
ConnectorTe r m i n a l
(Wire color)1st or 2nd
positionOFF
B152 25 (R/L) GroundBattery
voltageApprox. 0V
SKIA4298E
Te r m i n a l s
Lighting switch position
(+)
(–)
ConnectorTe r m i n a l
(Wire color)1st or 2nd
positionOFF
M94 14 (R/L) GroundBattery
voltageApprox. 0V
SKIA4299E
Battery voltage should exist.
SKIA4300E

AV-124
NAVIGATION SYSTEM
Revision: August 20072004 QX56
Ignition Signal Check for Display Control UnitEKS007M8
1. CHECK IGNITION SIGNAL
1. Disconnect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector
M94 terminal 12 (G/R) and ground.
OK or NG
OK >> Replace display control unit. Refer to AV- 1 5 8 , "Removal
and Installation of Display Control Unit" .
NG >> Check harness for open or short between display con-
trol unit and fuse.
Reverse Signal Check for NAVI Control UnitEKS007M9
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT-106, "
BACK-UP LAMP" .
2. CHECK REVERSE SIGNAL
With the selector lever in R-position, check voltage between NAVI
control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV- 1 5 7 , "Removal
and Installation of NAVI Control Unit" .
NG >> Check harness for open or short between NAVI control unit and back-up lamp position relay.
Reverse Signal Check for Display Control UnitEKS007MA
1. CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT-106, "
BACK-UP LAMP" . Battery voltage should exist.
WKIA1230E
Te r m i n a l s
Selector lever position
(+)
(–)
ConnectorTe r m i n a l
(Wire color)R-positionOther than R-
position
B152 27 (G/W) Ground Battery voltage Approx. 0V
SKIA4302E

POWER DOOR LOCK SYSTEM
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Revision: August 20072004 QX56
System DescriptionEIS002R9
Power is supplied at all times

to BCM terminal 70

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

to BCM terminal 57

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

to key switch and key lock solenoid terminal 3

through 10A fuse [No. 19, located in the fuse block (J/B)].
With ignition key inserted, 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 fuse block (J/B)].
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 serial link.
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

POWER DOOR LOCK SYSTEM
BL-29
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Revision: August 20072004 QX56
Trouble Diagnoses Symptom ChartEIS0 02 RF
BCM Power Supply and Ground Circuit CheckEIS002RG
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuse and fusible link.
NOTE:
Refer to BL-101, "
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-19
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
Front door lock assembly LH (actuator) does not
operate.1. Front door lock assembly LH (Actuator) checkBL-37
Specific door lock actuator does not operate.1. Front door lock actuator RH checkBL-392. Rear door lock actuator RH/LH checkBL-40
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-19
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-1172. Door switch checkBL-31
3. Power liftgate switch system inspectionBL-118
Glass hatch lock actuator does not operate.1. Glass hatch switch checkBL-362.Glass hatch lock actuator checkBL-41
3. Replace BCM.BCS-19
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: August 20072004 QX56
System DescriptionEIS002RP
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 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 in ACC or ON position, power is supplied

to BCM terminal 11

through 10A fuse [No. 4, located in the fuse block (J/B)].
When the ignition switch is in ON or START position, 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.
When the glass hatch ajar switch is ON (glass hatch is OPEN), ground is supplied

to BCM terminal 42

through glass hatch ajar switch

through glass hatch ajar switch case ground.
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

REMOTE KEYLESS ENTRY SYSTEM
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Revision: August 20072004 QX56
Trouble Diagnosis ProcedureEIS002RY
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-101, "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 CheckEIS003EF
1. CHECK FUSES 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
(Wire color)
Signal nameIgnition
switchVo l ta g e
(+) (–)
M2070 (W/B)
GroundBattery power
supplyOFFBattery
voltage
57 (Y/R)Battery power
supplyOFFBattery
voltage
M1811 ( O )ACC power
supplyACCBattery
voltage
38 (W/L)IGN power
supplyONBattery
voltage
WIIA0600E

BL-68
REMOTE KEYLESS ENTRY SYSTEM
Revision: August 20072004 QX56
ACC Power CheckEIS002S5
1. CHECK ACC POWER
With CONSULT-II
Check "ACC ON SW" in DATA MONITOR mode with CONSULT–II. Refer to BL-27, "
DATA MONITOR" .
Without CONSULT-II
Check voltage between BCM connector M18 terminal 11 and
ground.
OK or NG
OK >> ACC power circuit is OK.
NG >> Check the following:

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

Harness for open or short.
IPDM E/R Operation CheckEIS002S6
1. CHECK IPDM E/R INPUT VOLTAGE
Check voltage between IPDM E/R connector E122 terminal 45 and
ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> GO TO 2.
Monitor Item Condition
ACC ON SWIgnition switch position ACC : ON
Ignition switch position OFF : OFF
PIIA3367E
ConnectorTe r m i n a l
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M18 11 (O) GroundACC Battery voltage
OFF 0
PIIA7002E
ConnectorTe r m i n a l
(Wire color)Voltage (V)
(Approx.)
( + ) ( – )
E122 45 (G/W) Ground Battery voltage
LIIA1053E

BL-76
VEHICLE SECURITY (THEFT WARNING) SYSTEM
Revision: August 20072004 QX56
System DescriptionEIS002SE
DESCRIPTION
Operation Flow

Setting the vehicle security system
Initial condition

Ignition switch is in OFF position.
Disarmed phase

When the vehicle is being driven or when doors or glass hatch is open, the vehicle security system is set
in the disarmed phase on the assumption that the owner is inside or near the vehicle.
Pre-armed phase and armed phase

There are three conditions to enable the vehicle security system to turn into the "pre-armed" phase and
transition into armed phase. The initial requirements are that hood, glass hatch and all doors must be
closed (ignition key removed) for the transition to take place. Those three conditions are:
1. Locking vehicle with either front power door lock switch before exiting vehicle and closing all doors.
2. Using keyfob to lock already closed doors after leaving the vehicle.
3. Using driver key cylinder switch to lock already closed doors after leaving the vehicle.

Upon any of the above three steps taking place, the security indicator lamp illuminates for 30 seconds,
then the system automatically shifts into the "armed" phase.
Canceling the set vehicle security system
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key or the keyfob.
2. Open the power back door with the keyfob. When the power back door is closed after opening the power
back door with the keyfob, the system returns to the armed phase.
Activating the alarm operation of the vehicle security system
Make sure the system is in the armed phase.
When one of the following operations is performed, the system sounds the horns and flashes the headlamps
for about 50 seconds.
1. Engine hood, glass hatch or any door is opened before unlocking door with key or keyfob.
2. Door is unlocked without using key or keyfob.
3. Power back door is opened without using the keyfob.
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]
PIIA1367E