2009 INFINITI QX56 200

EXL-16
< FUNCTION DIAGNOSIS >
TURN SIGNAL AND HAZARD WARNING LAMPS
Component Description
INFOID:0000000003776166
1. Combination meter M23, M24 2. Combination switch M28 3. Hazard switch M55
4. BCM M18, M20 (view with instrument panel removed)
Part name Description
BCM Controls turn signal and hazard flasher operation.
Combination switch Lighting and turn signal switch requests are output to the BCM.
Hazard switch Hazard flasher request signal is output to the BCM.
Combination meter Outputs turn and hazard indicator as requested by the BCM.
Revision: December 20092009 QX56

PARKING, LICENSE PLATE AND TAIL LAMPS
EXL-17
< FUNCTION DIAGNOSIS >
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PARKING, LICENSE PLATE AND TAIL LAMPS
System DiagramINFOID:0000000003776167
System DescriptionINFOID:0000000003776168
PARKING, LICENSE PLATE AND TAIL LAMPS OPERATION
When the lighting switch is in 1ST position, BCM detects the LIGHTING SWITCH 1ST POSITION ON. The
BCM sends a parking light ON request via the CAN comm unication lines to the IPDM E/R. The IPDM E/R then
activates the tail lamp relay which sends power to the parking and instrument illumination circuits.
EXTERIOR LAMP BATTERY SAVER CONTROL
With the lighting switch (combination switch) in the 2nd position and the ignition switch is turned from ON or
ACC to OFF, the battery saver feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes unless the lighting switch position is
changed. If the lighting switch position is changed, then the headlamps are turned off.
This setting can be changed by CONSULT-III. Refer to BCS-25, "
BATTERY SAVER : CONSULT-III Function
(BCM - BATTERY SAVER)".
Component Parts LocationINFOID:0000000004225343
AWLIA0013GB
1. BCM M18, M20 (view with instrument
panel removed) 2. IPDM E/R E122, E123, E124 3. Combination switch M28
AWNIA0509ZZ
Revision: December 20092009 QX56

EXL-18
< FUNCTION DIAGNOSIS >
PARKING, LICENSE PLATE AND TAIL LAMPS
Component Description
INFOID:0000000003776170
Part name Description
BCM • Recieves lighting switch requests via BCM combination switch
reading function.
• Sends parking light request signal to the IPDM E/R.
IPDM E/R Activates the tail lamp relay upon request of the BCM.
Combination switch (lighting switch) Outputs lighting requests to the BCM.
Revision: December 20092009 QX56

TRAILER TOWEXL-19
< FUNCTION DIAGNOSIS >
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TRAILER TOW
System DiagramINFOID:0000000005867517
System DescriptionINFOID:0000000005867518
TRAILER TAIL LAMP OPERATION
The trailer tail lamps are controlled by the trailer tow re lay 1 located behind the left side of the instrument panel
(IP). With the combination switch in the 1st position, the BCM detects the LI GHTING SWITCH 1ST POSITION
ON. The BCM sends a parking light ON request via the CAN communication lines to the IPDM E/R. The IPDM
E/R then activates the tail lamp relay which activates t he trailer tow relay 1 and sends power to the trailer con-
nector.
TRAILER TURN SIGNAL LAMP OPERATION
The trailer turn signal lamps are controlled by the BCM. When the turn signal switch is in the LH or RH position
with the ignition switch ON, the combination switch sends a signal to the BCM. The BCM detects the TURN
RH or TURN LH ON request. The BCM sends a control signal to the respective trailer turn relay which sends
power to the trailer connector.
TRAILER HAZARD LAMP OPERATION
The trailer hazard lamps are controlled by the BCM. When the hazard switch is pressed, the BCM detects the
the hazard ON request. The BCM then sends a control signal to both trailer turn relays which sends power to
the trailer connector.
TRAILER BRAKE LAMP OPERATION
The trailer brake lamps are controlled by the BCM. W hen the brake pedal is depressed, the combination meter
receives a stop lamp switch signal from the stop lamp switch. The combination meter then sends the brake
signal to the BCM via the CAN communication lines. The BCM then sends a control signal to both trailer turn
relays which sends power to the trailer connector.
AWLIA1764GB
Revision: December 20092009 QX56

EXL-20
< FUNCTION DIAGNOSIS >
TRAILER TOW
Component Parts Location
INFOID:0000000005867519
Component DescriptionINFOID:0000000005867520
1. BCM M18, M19, M20 (view with instru- ment panel removed) 2. IPDM E/R E119, E122, E123, E124 3. Combination meter M24, M25
4. Combination switch (lighting and turn signal switch) M28 5. Trailer tow relay 1 M51 (view with
steering member removed) 6. Battery
7. Trailer turn relay LH E156 8. Trailer turn relay RH E157 9. Trailer tow relay 2 E140
10. Stop lamp switch E38 (column shift), E42 (floor shift)
AWLIA1772ZZ
Part name Description
BCM • Receives lighting and turn signal requests from combination
switch.
• Receives stop lamp signal requests from combination meter via CAN communication.
• Sends lighting signal request to the IPDM E/R to control the tail lamp relay via CAN communication.
• Sends turn/hazard/brake control signal to the trailer turn relays.
IPDM E/R Activates the tail lamp relay upon request from the BCM via CAN
communication.
Revision: December 20092009 QX56

TRAILER TOWEXL-21
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Combination meter • Receives stop lamp switch signal from stop lamp switch.
• Sends stop lamp signal request to the BCM via CAN communi-
cation.
Combination switch (lighting and turn signal switch) Outputs lighting and turn signal requests to the BCM.
Revision: December 20092009 QX56

EXL-22
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
HEADLAMP
HEADLAMP : CONSULT-III Function (BCM - HEAD LAMP)INFOID:0000000004215497
WORK SUPPORT
*: Initial setting
DATA MONITOR
ACTIVE TEST
Work Item Setting itemSetting
BATTERY SAVER SET ON* With the exterior lamp battery saver function
OFF Without the exterior lamp battery saver function
CUSTOM A/LIGHT SET-
TING MODE1* Normal
MODE2 More sensitive setting than normal setting (Turns ON earlier than normal operation.)
MODE3 More sensitive setting than MODE 2 (Turns ON earlier than MODE 2.)
MODE4 Less sensitive setting than normal setting (Turns ON later than normal operation.)
ILL DELAY SET MODE1* 45 sec.
Sets delay timer function timer operation time
(All doors closed)
MODE2
Without the func-
tion
MODE3 30 sec.
MODE4 60 sec.
MODE5 90 sec.
MODE6 120 sec.
MODE7 150 sec.
MODE8 180 sec.
Monitor Item [Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judged from IGN signal (ignition power supply)
HI BEAM SW [ON/OFF]
Each switch status that BCM judges from the combination switch reading function
H/L SW POS [ON/OFF]
LIGHT SW 1ST [ON/OFF]
PASSING SW [ON/OFF]
AUTO LIGHT SW [ON/OFF]
FR FOG SW [ON/OFF]
DOOR SW-DR [ON/OFF]
The switch status input from front door switch LH
AUT LIGHT SYS [ON/OFF] Auto light system status that BCM judges from the vehicle condition
Test ItemOperation Description
TA I L L A M P ON
Transmits the position light reques
t signal to IPDM E/R with CAN com-
munication to turn the tail lamp ON.
OFF Stops the tail lamp request signal transmission.
HEAD LAMP HI
Transmits the high beam request signal with CAN communication to turn
the headlamp (HI).
LO Transmits the low beam request signal with CAN communication to turn
the headlamp (LO).
OFF Stops the high & low beam request signal transmission.
Revision: December 20092009 QX56

DIAGNOSIS SYSTEM (BCM)EXL-23
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FLASHER
FLASHER : CONSULT-III Function (BCM - FLASHER)INFOID:0000000004215499
DATA MONITOR
ACTIVE TEST
COMB SW
COMB SW : CONSULT-III Fu nction (BCM - COMB SW)INFOID:0000000004215502
DATA MONITOR
FR FOG LAMP ON
Transmits the front fog lights request signal to IPDM E/R with CAN com-
munication to turn the front fog lamp ON.
OFF Stops the front fog lights request signal transmission.
DAYTIME RUNNING LIGHT ON
Transmits the day time running light request signal to IPDM E/R with
CAN communication to turn the each lamps ON.
OFF Stops the day time running light request signal transmission.
Test Item
Operation Description
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judged from IGN signal (ignition power supply)
HAZARD SW [ON/OFF] The switch status input from the hazard switch
TURN SIGNAL R [ON/OFF] Each switch condition that BCM judges from the combination switch reading function
TURN SIGNAL L [ON/OFF]
BRAKE SW [ON/OFF] The switch status input from the brake switch
Test Item Operation Description
FLASHER RH Outputs the voltage to turn the right side turn signal lamps ON.
LH Outputs the voltage to turn the left side turn signal lamps ON.
OFF Stops the voltage to turn the turn signal lamps OFF.
Monitor Item [Unit] Description
TURN SIGNAL R
[OFF/ON] Displays the status of the TURN RH switch in combination switch judged by BCM with the combination switch
reading function
TURN SIGNAL L
[OFF/ON] Displays the status
of the TURN LH switch in co mbination switch judged by BCM with the combination switch
reading function
HI BEAM SW
[OFF/ON] Displays the status of the HI BEAM sw
itch in combination switch judged by BCM with the combination switch
reading function
HEADLAMP SW1
[OFF/ON] Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination
switch reading function
HEADLAMP SW2
[OFF/ON] Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination
switch reading function
LIGHT SW 1ST
[OFF/ON] Displays the status of the HEADLAMP switch in combination switch judged by BCM with the combination
switch reading function
PA S S I N G S W
[OFF/ON] Displays the status of the PASSING sw
itch in combination switch judged by BCM with the combination switch
reading function
AUTO LIGHT SW
[OFF/ON] Displays the status of the AUTO LIGHT switch in combination switch judged by BCM with the combination
switch reading function
Revision: December 20092009 QX56