2007 INFINITI QX56 ignition

HEADLAMP (FOR USA)
LT-13
< SERVICE INFORMATION >
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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
SKIA4193E
Headlamp high beam should operate.
WKIA1438E
When lighting switch is in
HIGH position: HL LO REQ ON
: HL HI REQ ON
SKIA5775E

HEADLAMP (FOR USA)
LT-15
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6. Touch "HI" on "ACTIVE TEST" screen.
7. When headlamp high beam is operating, check voltage between
front combination lamp RH and LH harness connector and
ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E123
terminal 56 and front combination lamp RH harness connector
E107 terminal 6.
4. Check continuity between IPDM E/R harness connector E123
terminal 55 and front combination lamp LH harness connector
E11 terminal 6.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Repair harness or connector.
6.CHECK HEADLAMP GROUND
1. Turn ignition switch OFF.
2. Check continuity between front combination lamp RH harness
connector E107 terminal 2 and ground.
3. Check continuity between front combination lamp LH harness
connector E11 terminal 2 (B) and ground.
OK or NG
OK >> Check front combination lamp connector for damage or
poor connection. Repair as necessary.
NG >> Repair harness or connector.
Headlamp HI Does Not Illuminate (One Side)INFOID:0000000003533344
1.BULB INSPECTION
Inspect inoperative headlamp bulb.
OK or NG
OK >> GO TO 2.
NG >> Replace headlamp bulb. Refer to LT-21, "
Bulb Replacement" .
2.CHECK POWER TO HEADLAMP
Front combination lamp
(–) Voltage (+)
Connector Terminal
RH E107
6 Ground Battery voltage
LH E11
WKIA1852E
56 - 6 : Continuity should exist.
55 - 6 : Continuity should exist.
WKIA1853E
2 - Ground : Continuity should exist.
2 - Ground : Continuity should exist.
WKIA1854E

HEADLAMP (FOR USA)
LT-17
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Headlamp LO Does Not Illuminate (Both Sides)INFOID:0000000003533346
1.CHECK COMBINATION SWITCH INPUT SIGNAL
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "HEAD LAMP SW 1" and "HEAD LAMP SW 2" 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 "LO" on "ACTIVE TEST" screen.
4. Make sure headlamp low 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" turns ON when lighting switch is in
2ND 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 connector.
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.
6. Touch "LO" on "ACTIVE TEST" screen.When lighting switch is in
2ND position: HEAD LAMP SW 1 ON
: HEAD LAMP SW 2 ON
WKIA4262E
Headlamp low beam should operate.
WKIA1438E
When lighting switch is in
2ND position: HL LO REQ ON
SKIA5780E

LT-18
< SERVICE INFORMATION >
HEADLAMP (FOR USA)
7. When headlamp low beam is operating, check voltage between
front combination lamp RH and LH harness connector and
ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.CHECK HEADLAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector E123
terminal 54 and front combination lamp RH harness connector
E107 terminal 5.
4. Check continuity between IPDM E/R harness connector E123
terminal 52 and front combination lamp LH harness connector
E11 terminal 5.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" .
NG >> Repair harness or connector.
6.CHECK HEADLAMP GROUND
1. Turn ignition switch OFF.
2. Check continuity between front combination lamp RH harness
connector E107 terminal 1 and ground.
3. Check continuity between front combination lamp LH harness
connector E11 terminal 1 and ground.
OK or NG
OK >> Check front combination lamp connector for damage or
poor connection, ballasts (HID control unit) and xenon
bulbs. Repair as necessary.
NG >> Repair harness or connector.
Headlamp LO Does Not Illuminate (One Side)INFOID:0000000003533347
1.BULB INSPECTION
Inspect ballasts (HID control unit) and xenon bulb of inoperative headlamp bulb.
OK or NG
OK >> GO TO 2.
NG >> • (step1) Replace xenon bulb with other side bulb or new one. (If lamp illuminates correctly,
replace the xenon bulb).
• (step2) Replace ballast (HID control unit) with other side ballast or new one. (If lamp illuminates
correctly, replace the ballast).
(+)
(–)Vol tag e
Connector Terminal
RH E107
5 Ground Battery voltage
LH E11
WKIA1855E
54 - 5 : Continuity should exist.
52 - 5 : Continuity should exist.
WKIA1856E
1 - Ground : Continuity should exist.
1 - Ground : Continuity should exist.
WKIA1857E

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" .

HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -
LT-31
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3. Perform the Preliminary Check. Refer to LT-31, "Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckINFOID:0000000003533360
CHECK BCM CONFIGURATION
1.CHECK BCM CONFIGURATION
Confirm BCM configuration for "DTRL" is set to "WITH". Refer to BCS-18, "
Configuration" .
OK or NG
OK >> Continue preliminary check. Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspec-
tion" .
NG >> Change BCM configuration for "DTRL" to "WITH". Refer to BCS-18, "
Configuration" .
INSPECT POWER SUPPLY AND GROUND CIRCUIT FOR BCM
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection".
INSPECTION PARKING BRAKE SWITCH CIRCUIT
1.CHECK BRAKE INDICATOR
1. Turn ignition switch ON.
2. Apply parking brake.
3. Release parking brake.
OK or NG
OK >> Inspection End.
NG >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect parking brake switch connector.
3. Turn ignition switch ON.
4. Check voltage between parking brake switch connector M11 ter-
minal 1 and ground.
OK or NG
OK >> Replace parking brake switch.
NG >> GO TO 3.
3.CHECK PARKING BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter connector M24 (A)
terminal 23 and parking brake switch connector M11 (B) terminal
1.
OK or NG
OK >> Replace combination meter. Refer to DI-21, "Removal
and Installation of Combination Meter" .
NG >> Repair harness or connector.Brake indicator in combination meter should illuminate
when parking brake is applied and turn OFF when re-
leased.
1 - Ground : Battery voltage should exist.
WKIA4609E
1 - 23 : Continuity should exist.
WKIA4610E

AUTO LIGHT SYSTEM
LT-35
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OUTLINE
The auto light control system uses an optical sensor that detects outside brightness.
When the lighting switch is in "AUTO" position, it automatically turns on/off the parking lamps and the head-
lamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the set-
ting, refer to LT-40, "
Preliminary Check" .
Optical sensor ground is supplied
• to optical sensor terminal 3
• through BCM (body control module) terminal 18.
When ignition switch is turned to “ON” position and when outside brightness is darker than prescribed level,
input is supplied
• to BCM terminal 58
• through optical sensor terminal 4.
The headlamps will then illuminate. For a description of headlamp operation, refer to LT- 5 , "
System Descrip-
tion" .
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "System Description" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the AUTO position, and the ignition switch is turned from
ON or ACC to OFF, and one of the front doors is opened, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, then the headlamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
DELAY TIMER FUNCTION
When the ignition switch is ON and auto light switch is ON, the BCM turns on/off the headlamps. In delay timer
function, ignition is OFF, auto light sensor power source is OFF and the headlamps are not turned on/off by the
BCM. On condition that:
• when the state of ignition switch ON or ACC is ON and output judgment by auto light function is headlamp
ON changes to ignition switch and ACC are OFF and any door switch is ON, output judgment by BCM
should be headlamp ON for 5 minutes by timer. After time out, output judgment by BCM should be headlamp
OFF.
• when the state of any door switch is turned to ON from OFF while 45 second or 5 minute timer is counting,
timer stops, and restarts counting for 5 minutes, then BCM judges output as headlamp ON. After time out,
BCM judges output as headlamp OFF.
• when the state of front door switch (LH), front door switch (RH), rear door switch LH, rear door switch RH or
back door latch (door ajar switch) is ON turns to all door switches are OFF while 45 second or 5 minute timer
is counting, timer stops, and restarts counting for 45 seconds, then BCM judges output as headlamp ON.
After timer out, BCM judges output as headlamp OFF.
• when the state is ignition switch ON or ACC is ON or auto light switch OFF while timer is counting, timer
stops counting and BCM turns on/off lamps according to headlamp function, front fog lamp function, auto
light function and headlamp battery save function.
Delay timer control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionINFOID:0000000003533370
Refer to LAN-4, "CAN Communication System" .
Major Component and FunctionsINFOID:0000000003533371
Components Functions
BCM• Turns on/off circuits of tail light and headlamp according to signals from light sensor, lighting switch
(AUTO), front door switch LH, front door switch RH, rear door switch, back door latch (door ajar
switch), and ignition switch (ON, OFF).
Optical sensor • Converts ambient light (lux) to voltage, and sends it to BCM. (Detects lightness of 50 to 1,300 lux)