fuse INFINITI QX56 2004 Factory Service Manual

LT-80
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: August 20072004 QX56
TURN SIGNAL AND HAZARD WARNING LAMPSPFP:26120
Component Parts and Harness Connector LocationEKS007BI
System DescriptionEKS007BJ
OUTLINE
Power is supplied at all times

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

to BCM (body control module) terminal 70, and

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

to combination meter terminal 8.
TURN SIGNAL OPERATION
When the ignition switch is in the ON or START position, power is supplied

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

to BCM terminal 38, and

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

to combination meter terminal 24.
Ground is supplied

to BCM terminal 67 and

to combination meter terminal 17

through grounds M57, M61 and M79.
LH Turn
When the turn signal switch is moved to the left position, the BCM, interpreting it as turn signal is ON, outputs
turn signal from BCM terminal 60.
The BCM supplies power

through BCM terminal 60

to front turn/fog lamp LH terminal 2
WKIA3396E

TURN SIGNAL AND HAZARD WARNING LAMPS
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through front turn/fog lamp LH terminal 3

to grounds E9, E15 and E24, and

to rear turn signal lamp LH terminal 1

through rear turn signal lamp LH terminal 3

to grounds B7 and B19.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamp within combination meter.
RH Turn
When the turn signal switch is moved to the right position, the BCM, interpreting it as turn signal is ON, outputs
turn signal from BCM terminal 61.
The BCM supplies power

through BCM terminal 61

to front turn/fog lamp RH terminal 2

through front turn/fog lamp RH terminal 3

to grounds E9, E15 and E24, and

to rear turn signal lamp RH terminal 1

through rear signal lamp terminal 3

to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamp within combination meter.
HAZARD LAMP OPERATION
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 combination meter terminal 8.
Ground is supplied

to BCM terminal 67 and

to combination meter terminal 17

to grounds M57, M61 and M79.
When the hazard switch is depressed, ground is supplied

to BCM terminal 29

through hazard switch terminal 2

through hazard switch terminal 1

through grounds M57, M61 and M79.
When the hazard switch is depressed, the BCM, interpreting it as turn signal is ON, outputs turn signal from
BCM terminals 60 and 61.
The BCM supplies power

through BCM terminals 60 and 61

to front turn/fog lamp LH and RH terminal 2

through front turn/fog lamp LH and RH terminal 3

to grounds E9, E15 and E24, and

to rear turn signal lamp LH terminal 1

through rear turn signal lamp LH terminal 3

to grounds B7 and B19, and

to rear turn signal lamp RH terminal 1

through rear turn signal lamp terminal 3

to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamps within combination meter.

LT-82
TURN SIGNAL AND HAZARD WARNING LAMPS
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REMOTE KEYLESS ENTRY SYSTEM OPERATION
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 combination meter terminal 8.
Ground is supplied

to BCM terminal 67 and

to combination meter terminal 17

through grounds M57, M61 and M79.
When the remote keyless entry system is triggered by input from the keyfob, the BCM, interpreting it as turn
signal is ON, output turn signal from BCM terminals 60 and 61.
The BCM supplies power

through BCM terminals 60 and 61

to front turn/fog lamp LH and RH terminal 2

through front turn/fog lamp LH and RH terminal 3

to grounds E9, E15 and E24, and

to rear turn signal lamp LH terminal 1

through rear turn signal lamp LH terminal 3

to grounds B7 and B19, and

to rear turn signal lamp RH terminal 1

through rear turn signal lamp RH terminal 3

to grounds B117 and B132.
BCM sends signal to combination meter through CAN communication lines, and turns on turn signal indicator
lamps within combination meter.
With power and input supplied, the BCM controls the flashing of the hazard warning lamps when keyfob is
used to activate the remote keyless entry system.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
CAN Communication System DescriptionEKS007BK
Refer to LAN-5, "CAN COMMUNICATION" .

TURN SIGNAL AND HAZARD WARNING LAMPS
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Preliminary CheckEKS007BO
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 is blown, be sure to eliminate cause of blown fuse before installing new fuse. 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 No.
BCMBattery f
Ignition switch ON or START position 59
BCM
(–)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
BCM
Continuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground Yes
LIIA0915E

STOP LAMP
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STOP LAMPPFP:26550
System DescriptionEKS007C6
Power is supplied at all times

through 10A fuse [No. 20, located in fuse block (J/B)]

to stop lamp switch terminal 3 and

to stop lamp relay terminal 1.
When the brake pedal is pressed, the stop lamp switch is closed and power is supplied

through stop lamp switch terminal 4

to stop lamp relay terminal 3

through stop lamp relay terminal 4

to rear combination lamp LH and RH terminal 2 and

to high-mounted stop lamp terminal +.
Ground is supplied

to rear combination lamp LH terminal 1 and

to high-mounted stop lamp terminal –

through grounds B7 and B19, and

to rear combination lamp RH terminal 1

through grounds B117 and B132.
With power and ground supplied, the stop lamps illuminate.

LT-108
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: August 20072004 QX56
PARKING, LICENSE PLATE AND TAIL LAMPSPFP:26550
Component Parts and Harness Connector LocationEKS007CD
System DescriptionEKS007CE
Control of the parking, license plate, and tail lamp operation is dependent upon the position of the lighting
switch (combination switch). When the lighting switch is placed in the 1ST position, the BCM (body control
module) receives input signal requesting the parking, license plate, side marker and tail lamps to illuminate.
This input signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across
the CAN communication lines. The CPU (central processing unit) of the IPDM E/R controls the tail lamp relay
coil. This relay, when energized, directs power to the parking, license plate and tail lamps, which then illumi-
nate.
Power is supplied at all times

to tail lamp relay, located in the IPDM E/R, and

through 20A fuse (No. 53, located in the IPDM E/R)

to CPU of the IPDM E/R, and

to ignition relay, located in the IPDM E/R, and

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

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

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

to BCM terminal 38, and

to ignition relay, located in the IPDM E/R.
Ground is supplied

to BCM terminal 67

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59

through grounds E9, E15 and E24.
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PARKING, LICENSE PLATE AND TAIL LAMPS
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OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM receives
input signal requesting the parking, license plate, side marker and tail lamps to illuminate. This input signal is
communicated to the IPDM E/R across the CAN communication lines. The CPU in the IPDM E/R controls the
tail lamp relay coil, which when energized, directs power

through 10 A fuse (No. 37, located in the IPDM E/R)

through IPDM E/R terminal 57

to front combination lamp LH and RH terminal 3

to license plate lamps terminal +

to rear combination lamp LH and RH terminal 3.
Ground is supplied

to front combination lamp LH and RH terminal 4

through grounds E9, E15 and E24, and

to rear combination lamp LH terminal 1

through grounds B7 and B19, and

to rear combination lamp RH terminal 1 and

to license plate lamps terminal –

through grounds B117 and B132.
With power and ground supplied, the parking, license plate and tail lamps illuminate.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST (or 2ND) position, and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the parking, license and tail lamps remain illuminated for 5 minutes, then the parking,
license plate and tail lamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS007CF
Refer to LAN-5, "CAN COMMUNICATION" .

LT-116
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: August 20072004 QX56
Preliminary CheckEKS007CL
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 is blown, be sure to eliminate cause of blown fuse before installing new fuse. 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 No.
BCMBattery f
Ignition switch ON or START position 59
IPDM E/RBattery 53
Battery (Tail lamps ON) 37
BCM
(–)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
BCM
Continuity
ConnectorTe r m i n a l
(wire color)
M20 67 (B) Ground Yes
LIIA0915E

TRAILER TOW
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TRAILER TOWPFP:93020
Component Parts and Harness Connector LocationEKS007CT
System DescriptionEKS007CU
Power is supplied at all times

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

to BCM (body control module) terminal 70, and

through 10A fuse [No. 32, located in the IPDM E/R (intelligent power distribution module engine room)]

through IPDM E/R terminal 61

to trailer tow relay 1 terminal 3, and

through 20A fuse (No. 53, located in the IPDM E/R)

to CPU of the IPDM E/R, and

through 30A fusible link (letter j , located in the fuse and fusible link box)

to trailer tow relay 2 terminals 3 and 6, and

through 40A fusible link (letter k , located in the fuse and fusible link box)

to electric brake (pre-wiring) terminal 5.
With the ignition switch in the ON or START position, power is supplied
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TRAILER TOW
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through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38, and

through 10A fuse (No. 51, located in the IPDM E/R)

to trailer tow relay 2 terminal 1.
Ground is supplied

to BCM terminal 67 and

to electric brake (pre-wiring) terminal 1

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59

to trailer tow relay 1 terminal 2

to trailer tow relay 2 terminal 2 and

to trailer connector terminal 2

through grounds E9, E15 and E24.
TRAILER TAIL LAMP OPERATION
The trailer tail lamps are controlled by the trailer tow relay 1.
With the lighting switch in the parking and tail lamp ON (1ST) position, AUTO position (and the auto light sys-
tem is activated) or headlamp ON (2ND) position, power is supplied

through the tail lamp relay, located in the IPDM E/R

through 10A fuse (No. 36, located in the IPDM E/R)

through IPDM E/R terminal 49

to trailer tow relay 1 terminal 1.
When energized, trailer tow relay 1 supplies tail lamp power to trailer connector terminal 6.
TRAILER BRAKE, TURN SIGNAL AND HAZARD LAMP OPERATION
The trailer brake, turn signal and hazard lamps are all controlled by the BCM. When the brake pedal is
depressed, the BCM receives stop lamp switch signal through CAN communication. If the brake pedal is
depressed or either turn signal or the hazard lamps are turned on, the BCM supplies voltage to the trailer
lamps to make them flash or turn on.
Left trailer brake, turn signal and hazard lamp output is supplied

through BCM terminal 52

to trailer connector terminal 1.
Right trailer brake, turn signal and hazard lamp output is supplied

through BCM terminal 51

to trailer connector terminal 4.
TRAILER BRAKE OPERATION
The trailer brake is controlled by the electric brake. The electric brake receives stop lamp switch signal at elec-
tric brake (pre-wiring) terminal 2 when the brake pedal is depressed.
When the brake pedal is depressed, power is supplied by the electric brake

through electric brake (pre-wiring) terminal 3

to trailer connector terminal 3.
TRAILER POWER SUPPLY OPERATION
The trailer power supply is controlled by the trailer tow relay 2.
When the ignition switch is in the ON or START position, power is supplied

through 10A fuse (No. 51, located in the IPDM E/R)

to IPDM E/R terminal 16

to trailer tow relay 2 terminal 1.
When energized, the trailer tow relay 2 supplies power

through trailer tow relay 2 terminals 5 and 7

to trailer connector terminal 5.