2007 INFINITI QX56 relay

IDX-8
ALPHABETICAL INDEX
Three way catalyst ............................................ EM-21
Three way catalyst function (Bank 1) ............... EC-376
Three way catalyst function (Bank 2) ............... EC-376
Three way catalyst precautions ............................ GI-5
Throttle control motor ....................................... EC-601
Throttle control motor relay .............................. EC-589
Throttle position sensor (TPS) .. EC-224, EC-343, EC-
514, EC-516, EC-621
Throttle valve closed position learning ............... EC-80
Tie-rod ............................................................... PS-15
Timing chain ..................................................... EM-37
Tire rotation ....................................................... MA-28
Tire size .............................................................. GI-51
Torque converter installation AT-239, AT-240, AT-243,
AT-244
Torque convertor clutch solenoid valve ... AT-114, AT-
116
Tow truck towing ................................................. GI-44
Towing point ....................................................... GI-45
TPS1 - Wiring diagram .................................... EC-345
TPS2 - Wiring diagram .................................... EC-226
TPS3 - Wiring diagram .................................... EC-623
Traction control system - Wiring diagram ....... BRC-16
Transfer control device ............. TF-75, TF-79, TF-138
Transfer control unit inspection table ................. TF-35
Transfer dropping resistor .................................. TF-89
Transfer fluid temperature sensor TF-103, TF-154, TF-
167
Transfer motor .................................... TF-101, TF-142
Transfer motor relay ........................................ TF-101
Transfer oil replacement ................................... MA-24
Transfer serial number ........................................ GI-50
Transmission serial number ................................ GI-50
Tread-FR&RR (Dimensions) ............................... GI-51
Trim ..................................................................... EI-35
TRNSCV - Wiring diagram .................. BL-130, BL-146
Trouble diagnoses .............................................. GI-11
Turbine revolution sensor ................................ AT-105
TURN - Wiring diagram ...................................... LT-67
Turn signal lamp ................................................. LT-63
Two trip detection logic ...................................... EC-49
Two-pole lift ........................................................ GI-43
V
Vacuum hose (brake system) ............................ BR-20
Vacuum hose drawing (Engine control) ........... EC-106
Valve clearance ................................................ EM-55
Valve guide ....................................................... EM-69
Vanity mirror lamp ............................................. LT-110
VDC (vehicle dynamics control) ........................ BRC-7
VDC -Wiring diagram ...................................... BRC-16
Vehicle identification number .............................. GI-49
Vehicle recovery (freeing a stuck vehicle) .......... GI-45
Vehicle security (theft warning) system ............. BL-67
Vehicle speed sensor (VSS) ............................ EC-464
VEHSEC - Wiring diagram ................................. BL-71
VENT/V - Wiring diagram .................. EC-412, EC-419
VIN registration .................................................. EC-79
Viscosity number (SAE) .................................... MA-12
VSS A/T - Wiring diagram .................. AT-107, AT-109
W
W/ANT - Wiring diagram .................................... AV-59
Wait detection switch ......................................... TF-68
WARN - Wiring diagram ...................................... DI-29
Warning chime .................................................... DI-38
Warning lamps .................................................... DI-28
Washer, front ..................................................... WW-4
Washer, rear .................................................... WW-29
Water pump ...................................................... CO-19
Water temperature gauge ..................................... DI-5
Wheel alignment (front) ..................................... FSU-6
Wheel alignment (rear) ................................... RSU-25
Wheel bearing (front) ........................................ FAX-5
Wheel bearing (rear) ......................................... RAX-5
Wheel hub (rear) ............................................... RAX-5
Wheel size .......................................................... GI-51
Wheelbase (Dimensions) .................................... GI-51
Width (Dimensions) ............................................. GI-51
WINDOW - Wiring diagram .............................. GW-22
Window, door ...................................... GW-62, GW-65
Windshield ....................................................... GW-11
WIP/R - Wiring diagram ................................... WW-33
WIPER - Wiring diagram .................................... WW-8
Wiper, front ........................................................ WW-4
Wiper, rear ....................................................... WW-29
Wiring Diagram (Cell code) list ......................... PG-62
Wiring diagrams .................................................. GI-15
WT-T/WARN - Wiring diagram .......................... WT-11

HEADLAMP (FOR USA)
LT-5
< SERVICE INFORMATION >
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HEADLAMP (FOR USA)
Component Parts and Harness Connector LocationINFOID:0000000003533332
System DescriptionINFOID:0000000003533333
Control of the headlamp system operation is dependent upon the position of the combination switch (lighting
switch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives input
requesting the headlamps (and tail lamps) illuminate. This input 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 headlamp high and headlamp low relay coils. When energized, these relays
direct power to the respective headlamps, which then illuminate.
OUTLINE
Power is supplied at all times
• to ignition relay, located in the IPDM E/R,
• to headlamp high relay, located in the IPDM E/R,
• to headlamp low relay, located in the IPDM E/R,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU of 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
• to ignition relay, located in the IPDM E/R, and
• through 10A fuse (No. 59, located in the fuse and relay box)
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LT-6
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
• to BCM terminal 38.
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.
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This
input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R con-
trols the headlamp low relay coil. When energized, this relay directs power
• through 15A fuse (No. 41, located in the IPDM E/R)
• through IPDM E/R terminal 54
• to front combination lamp RH terminal 5, and
• through 15A fuse (No. 40, located in the IPDM E/R)
• through IPDM E/R terminal 52
• to front combination lamp LH terminal 5.
Ground is supplied
• to front combination lamp LH and RH terminal 1
• through grounds E9, E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input request-
ing the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN com-
munication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator.
The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power
• through 10A fuse (No. 34, located in the IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 6, and
• through 10A fuse (No. 35, located in the IPDM E/R)
• through IPDM E/R terminal 55
• to front combination lamp LH terminal 6.
Ground is supplied
• to front combination lamp LH and RH terminal 2
• through grounds E9, E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
XENON HEADLAMP
Xenon type headlamp is adopted to the low beam headlamps. Xenon bulbs do not use a filament. Instead,
they produce light when a high voltage current is passed between two tungsten electrodes through a mixture
of xenon (an inert gas) and certain other metal halides. In addition to added lighting power, electronic control
of the power supply gives the headlamps stable quality and tone color.
Following are some of the many advantages of the xenon type headlamp.
• The light produced by the headlamps is a white color comparable to sunlight that is easy on the eyes.
• Light output is nearly double that of halogen headlamps, affording increased area of illumination.
• The light features a high relative spectral distribution at wavelengths to which the human eye is most sensi-
tive. This means that even in the rain, more light is reflected back from the road surface toward the vehicle,
for added visibility.
• Power consumption is approximately 25 percent less than halogen headlamps, reducing battery load.
BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, unless the combination switch (lighting
switch) position is changed. If the combination switch (lighting switch) position is changed, then the headlamps
are turned off.
AUTO LIGHT OPERATION
Refer to LT-34, "System Description" for auto light operation.
VEHICLE SECURITY SYSTEM (PANIC ALARM)

HEADLAMP (FOR USA)
LT-13
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ACTIVE TEST
Display Item List
SELF-DIAGNOSTIC RESULTS
Display Item List
CONSULT-II Function (IPDM E/R)INFOID:0000000003533342
Refer to PG-18, "CONSULT-II Function (IPDM E/R)" .
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
DATA MONITOR
All Items, Main Items, Select Item Menu
NOTE:
Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the dis-
play may not be correct.
DOOR SW-RR "ON/OFF"Displays status of the rear door as judged from the rear door switch (RH) signal. (Door is open:
ON/Door is closed: OFF)
DOOR SW-RL "ON/OFF"Displays status of the rear door as judged from the rear door switch (LH) signal. (Door is open:
ON/Door is closed: OFF)
BACK DOOR SW "ON/OFF"Displays status of the back door as judged from the back door switch signal. (Door is open: ON/
Door is closed: OFF)
TURN SIGNAL R "ON/OFF" Displays status (Turn right: ON/Others: OFF) as judged from lighting switch signal.
TURN SIGNAL L "ON/OFF" Displays status (Turn left: ON/Others: OFF) as judged from lighting switch signal.
CARGO LAMP SW "ON/OFF" Displays status of cargo lamp switch.
OPTICAL SENSOR [0 - 5V] Displays "ambient light (close to 5V when dark/close to 0V when light)" judged from optical sen-
sor signal. Monitor item Contents
Te s t i t e m D e s c r i p t i o n
TAIL LAMP Allows tail lamp relay to operate by switching ON-OFF.
HEAD LAMP Allows headlamp relay (HI, LO) to operate by switching ON-OFF.
FR FOG LAMP Allows fog lamp relay to operate by switching ON-OFF.
CARGO LAMP Allows cargo lamp to operate by switching ON-OFF.
CORNERING LAMP Not used.
Monitored item CONSULT-ll display Description
CAN communication CAN communication [U1000] Malfunction is detected in CAN communication.
CAN communication system CAN communication system 1 to 6 [U1000] Malfunction is detected in CAN system.
Item nameCONSULT-II
screen displayDisplay or
unitMonitor item selection
Description
ALL
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
Parking, license plate
and tail lamps requestTAIL&CLR REQ ON/OFF×× ×Signal status input from BCM
Headlamp low beam re-
questHL LO REQ ON/OFF×× ×Signal status input from BCM
Headlamp high beam re-
questHL HI REQ ON/OFF×× ×Signal status input from BCM
Daytime lights request DTRL REQ ON/OFF×–×Signal status input from BCM
Front fog lamps request FR FOG REQ ON/OFF×× ×Signal status input from BCM

LT-14
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
ACTIVE TEST
Headlamp HI Does Not Illuminate (Both Sides)INFOID:0000000003533343
1.CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "HI BEAM SW" turns ON-OFF linked with operation of
lighting switch.
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT-73, "
Combination
Switch Inspection" .
2.HEADLAMP ACTIVE TEST
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST"
on "SELECT DIAG MODE" screen.
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "HI" on "ACTIVE TEST" screen.
4. Make sure headlamp high beam operates.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3.CHECK IPDM E/R
1. Select "IPDM E/R" on CONSULT-II, and select "DATA MONI-
TOR" on "SELECT DIAG MODE" screen.
2. Make sure "HL LO REQ" and "HL HI REQ" turns ON when light-
ing switch is in HIGH position.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> Replace BCM. Refer to BCS-24, "
BCM" .
4.CHECK HEADLAMP INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front combination lamp RH and LH connectors.
3. Turn ignition switch ON.
4. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
5. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
Test item CONSULT-II screen display Description
Headlamp relay (HI, LO) out-
put
EXTERNAL LAMPSAllows headlamp relay (HI, LO) to operate by switching operation (OFF,
HI, LO) at your option (Headlamp high beam repeats ON-OFF every 1
second).
Front fog lamp relay (FOG)
outputAllows fog lamp relay (FOG) to operate by switching operation ON-OFF
at your option.
Tail lamp relay outputAllows tail lamp relay to operate by switching operation ON-OFF at your
option.
When lighting switch is in
HIGH position: HI BEAM SW ON
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Headlamp high beam should operate.
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When lighting switch is in
HIGH position: HL LO REQ ON
: HL HI REQ ON
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-25
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lamps turn off when lighting switch is in the 2ND position or AUTO position (Headlamp is "ON") and when light-
ing switch is in the PASSING position. (Daytime light lamps are not turned off only by parking brake itself.)
A parking brake signal and engine run or stop signal are sent to BCM (body control module) by CAN commu-
nication line.
OUTLINE
Power is supplied at all times
• to ignition relay, located in the IPDM E/R (intelligent power distribution module engine room),
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU (central processing unit) of the IPDM E/R,
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to combination meter terminal 8, and
• through 10A fuse (No. 45, located in the IPDM E/R)
• to daytime light relay terminals 2 and 5.
When the ignition switch is in ON or START position, power is supplied
• to ignition relay, located in the IPDM E/R,
• 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.
DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, the IPDM
E/R receives input requesting the daytime lights illuminate. This input is communicated across the CAN com-
munication lines. The CPU of the IPDM E/R controls the daytime light relay coil. When energized, this relay
directs power
• through daytime light relay terminal 3
• to front combination lamp LH terminal 2
• through front combination lamp LH terminal 6
• to IPDM E/R terminal 55
• through 10A fuse (No. 35, located in the IPDM E/R)
• through 10A fuse (No. 34, located in the IPDM E/R)
• through IPDM E/R terminal 56
• to front combination lamp RH terminal 6.
Ground is supplied
• to front combination lamp RH terminal 2
• through grounds E9, E15 and E24.
With power and ground supplied, the daytime lights illuminate. The high beam headlamps are now wired in
series and illuminate at a reduced intensity.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "System Description" .
AUTO LIGHT OPERATION
Refer to LT-34, "System Description" .
CAN Communication System DescriptionINFOID:0000000003533355
Refer to LAN-4, "CAN Communication System" .

LT-32
< SERVICE INFORMATION >
HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
CONSULT-II Function for BCM
INFOID:0000000003533361
Refer to BCS-16, "CONSULT-II Function (BCM)" .
CONSULT-II Function for IPDM E/RINFOID:0000000003533362
Refer to PG-18, "CONSULT-II Function (IPDM E/R)" .
Daytime Light Control Does Not Operate Properly (Normal Headlamps Operate Prop-
erly)
INFOID:0000000003533363
1.CHECK FUSE
Inspect 10A fuse (No. 45, located in the IPDM E/R).
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK DAYTIME LIGHT RELAY POWER SUPPLY CIRCUIT
1. Remove daytime light relay.
2. Check voltage between daytime light relay connector E103 ter-
minals 2, 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK DAYTIME LIGHT RELAY
1. Apply battery voltage to daytime light relay terminal 2 and
ground terminal 1.
2. Check continuity between terminals 3 and 5.
OK or NG
OK >> GO TO 4.
NG >> Replace daytime light relay.
4.CHECK DAYTIME LIGHT RELAY CIRCUIT
1. Disconnect IPDM E/R connector E122.
2. Check continuity between daytime light relay connector E103
(B) terminal 1 and front combination lamp LH connector E122
(A) terminal 44.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5.CHECK INPUT SIGNAL 2, 5 - Ground : Battery voltage should exist.
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3 - 5 : Continuity should exist.
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44 - 1 : Continuity should exist.
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HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-33
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1. Connect daytime light relay and IPDM E/R connector.
2. Apply parking brake and start engine. Headlamp switch OFF.
3. Select "IPDM E/R" on CONSULT-II. With data monitor, make
sure "DTRL REQ" turns OFF-ON linked with operation of park-
ing brake switch.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> GO TO 6.
6.CHECKING CAN COMMUNICATIONS
Select "BCM" on CONSULT-II and perform self-diagnosis for BCM.
Displayed self-diagnosis results
NO DTC>> Replace BCM. Refer to BCS-24, "BCM" .
CAN COMM CIRCUIT>> Check BCM CAN communication system.
Refer to BCS-18, "
CAN Communication Inspection
Using CONSULT-II (Self-Diagnosis)" .
Aiming AdjustmentINFOID:0000000003533364
Refer to LT-20, "Aiming Adjustment".
Bulb ReplacementINFOID:0000000003533365
Refer to LT-21, "Bulb Replacement".
Removal and InstallationINFOID:0000000003533366
Refer to LT-22, "Removal and Installation".
Disassembly and AssemblyINFOID:0000000003533367
Refer to LT-23, "Disassembly and Assembly". Parking brake ON : DTRL REQ OFF
Parking brake OFF : DTRL REQ ON
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