turn signal INFINITI QX56 2008 Factory Service Manual

AUTO LIGHT SYSTEMEXL-11
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AUTO LIGHT SYSTEM
System DiagramINFOID:0000000001547102
System DescriptionINFOID:0000000001547103
• BCM (Body Control Module) controls auto light operati on according to signals from optical sensor, lighting
switch and ignition switch.
• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate, tail and
headlamps according to CAN communication signals from BCM.
• Optical sensor detects ambient br ightness and converts light (lux) to voltage, then sends the optical sensor
signal to BCM.
OUTLINE
The auto light control system has an optical sensor that detects outside brightness.
When the lighting switch is in AUTO position, it automat ically turns ON/OFF the parking, license plate, tail and
headlamps in accordance with the ambient light. Sensitivity can be adjusted in four steps. For the details of the
setting, Refer to EXL-23, "
EXTERNAL LAMP : CONSULT-III Function".
AWLIA0011GB
Revision: March 2010 2008 QX56

FRONT FOG LAMPEXL-15
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FRONT FOG LAMP
System DiagramINFOID:0000000001547106
System DescriptionINFOID:0000000001547107
The front fog lamps are activated with the lighting switch (combination switch). The lighting switch signal to
the BCM is monitored with the BCM combination switch reading function. When the fog lamps are turned ON
with the lighting switch, the BCM sends a front fog lamp request signal via CAN communication lines to the
IPDM E/R. The IPDM E/R grounds the front fog la mp relay coil to activate the front fog lamps.
Component Parts LocationINFOID:0000000001547108
Component DescriptionINFOID:0000000001547109
FRONT FOG LAMP OPERATION
When the lighting switch is in front fog lamp ON posit ion and also in 1ST or 2ND position or AUTO position
(headlamp is ON), the BCM detects FR FOG ON and t he HEAD LAMP1, 2 ON or the AUTO LIGHT ON. The
BCM sends a front fog lamp request ON signal via the CAN communication lines to the IPDM E/R. The IPDM
E/R then turns ON the front fog lamp re lay sending power to the front fog lamps.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-7, "System Description".
JPLIA0004GB
1. BCM M18, M20 (view with instrument
panel removed) 2. IPDM E/R E122, E123, E124 3. Combination switch M28
ALLIA0379ZZ
Revision: March 2010
2008 QX56

EXL-16
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TURN SIGNAL AND HAZARD WARNING LAMPS
TURN SIGNAL AND HAZARD WARNING LAMPS
System DiagramINFOID:0000000001547110
System DescriptionINFOID:0000000001547111
TURN SIGNAL OPERATION
When the turn signal switch is in LH or RH position with the ignition switch in ON position, the BCM detects the
TURN RH or TURN LH ON request. The BCM outputs the flasher signal to the respective turn signal lamp.
The BCM also sends a turn indicator signal ON reques t via the CAN communication lines to the combination
meter. The combination meter then activates the appropriate turn signal indicator and audible buzzer.
HAZARD LAMP OPERATION
When the hazard switch is in ON position, the BCM det ects the hazard switch signal ON. The BCM outputs the
flasher signal (right and left). The BCM sends a hazar d indicator signal ON request via the CAN communica-
tion lines to the combination meter. The combination meter then activates the hazard indicator and audible
buzzer.
REMOTE KEYLESS ENTRY OPERATION
The remote keyless entry receiver transmits a hazar d request signal to the BCM, then BCM controls hazard
lamps.
Refer to SEC-9, "
System Description".
COMBINATION SWITCH READING FUNCTION
Refer to BCS-7, "System Description".
AWLIA0006GB
Revision: March 2010 2008 QX56

TURN SIGNAL AND HAZARD WARNING LAMPSEXL-17
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Component Parts LocationINFOID:0000000001547112
Component DescriptionINFOID:0000000001547113
1. Combination meter M24 2. Combination switch M283. Hazard switch M55
4. BCM M18, M20 (view with instrument panel removed)
ALLIA0384ZZ
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: March 2010 2008 QX56

EXL-20
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TRAILER TOW
TRAILER TOW
System DiagramINFOID:0000000006095108
System DescriptionINFOID:0000000006095109
TRAILER TAIL LAMP OPERATION
The trailer tail lamps are controlled by the trailer tow relay 1 located behind the left side of the instrument panel
(IP). With the combination switch in the 1st position, the BCM detects the LIGHTING 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 the 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. W hen the hazard switch is pressed, the BCM detects the
the hazard ON request. The BCM then sends a control si gnal 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. When 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: March 2010 2008 QX56

TRAILER TOWEXL-21
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Component Parts LocationINFOID:0000000006095110
Component DescriptionINFOID:0000000006095111
1. BCM M18, M19, M20 (view with instru- ment panel removed) 2. IPDM E/R E119, E122, E123, E124 3. Combination meter M23, M24
4. Combination 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
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: March 2010
2008 QX56

EXL-22
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TRAILER TOW
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 Outputs lighting and turn signal requests to the BCM.
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)EXL-23
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : Diagnosis DescriptionINFOID:0000000001547118
BCM CONSULT-III FUNCTION
CONSULT-III performs the following functions via CAN communication with BCM.
COMMON ITEM : CONSULT-III FunctionINFOID:0000000001547119
ECU IDENTIFICATION
Displays the BCM part No.
SELF-DIAG RESULT
Refer to BCS-50, "DTCIndex".
EXTERNAL LAMP
EXTERNAL LAMP : CONSULT-III FunctionINFOID:0000000001547120
WORK SUPPORT
1 : Initial setting
DATA MONITOR
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM.
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM pa rt number is displayed.
CONFIGURATION This function is not used even though it is displayed.
Service item Setting item Setting
BATTERY SAVER SET ON
1With the exterior lamp battery saver function
OFF Without the exterior lamp battery saver function
ILL DELAY SET MODE 1
145 sec.
Sets delay timer function timer operation time
(All doors closed)
MODE 2
Without the func-
tion
MODE 3 30 sec.
MODE 4 60 sec.
MODE 5 90 sec.
MODE 6 120 sec.
MODE 7 150 sec.
MODE 8 180 sec.
CUSTOM A/LIGHT SET-
TING MODE 1
1Normal
MODE 2 More sensitive setting than normal setting (Turns ON earlier than normal operation.)
MODE 3 More sensitive setting than MODE 2 (Turns ON earlier than MODE 2.)
MODE 4 Less sensitive setting than normal setting (Turns ON later than normal operation.)
Revision: March 2010 2008 QX56

EXL-24
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DIAGNOSIS SYSTEM (BCM)
1: The item is indicated, not monitored
ACTIVE TEST
Monitor item[Unit] Description
IGN ON SW
[ON/OFF] The switch status input from ignition switch
ACC ON SW
[ON/OFF] The switch status input from ignition switch
TURN SIGNAL R
[ON/OFF]
Each switch status that BCM judges from the combination switch reading function
TURN SIGNAL L
[ON/OFF]
HI BEAM SW
[ON/OFF]
HEAD LAMP SW1
[ON/OFF]
HEAD LAMP SW2
[ON/OFF]
LIGHT SW 1ST
[ON/OFF]
AUTO LIGHT SW
[ON/OFF]
PASSING SW
[ON/OFF]
FR FOG SW
[ON/OFF]
CARGO LAMP SW
[ON/OFF]
RR FOG SW
1
[ON/OFF]
—
DOOR SW-DR
[ON/OFF] The switch status input from front door switch LH
DOOR SW-AS
[ON/OFF] The switch status input from front door switch RH
DOOR SW-RR
[ON/OFF] The switch status input from rear door switch RH
DOOR SW- RL
[ON/OFF] The switch status input from rear door switch LH
DOOR SW-BK
[ON/OFF] The switch status input from the back door switch
OPTICAL SENSOR
[V] The value of exterior brightness voltage input from the optical sensor
Test item
Operation Description
TA I L L A M P ON
Transmits the position light request signal to IPDM E/R via CAN commu-
nication to turn the tail lamp ON.
OFF Stops the tail lamp request signal transmission.
HEAD LAMP HI
Transmits the high beam request signal via CAN communication to turn
the headlamp (HI)
LO Transmits the low beam request signal via CAN communication to turn
the headlamp (LO).
OFF Stops the high & low beam request signal transmission.
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)EXL-25
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1: The item is indicated, not monitored.
FLASHER
FLASHER : CONSULT-III Function (BCM - FLASHER)INFOID:0000000001547121
DATA MONITOR
ACTIVE TEST
FR FOG LAMP ON
Transmits the front fog lamp light request signal to IPDM E/R via CAN
communication to turn the front fog lamp ON.
OFF Stops the front fog lamp request signal transmission.
CORNERING LAMP
1
RH —
LH
OFF
CARGO LAMP ON
Tramsmits the cargo lamp request signal to the IPDM E/R via CAN com-
munication to turn on the cargo lamp.
OFF Stops the cargo lamp request signal transmission.
Test item
Operation Description
Monitor item
[Unit] Description
IGN ON SW
[ON/OFF] The switch status input from the ignition switch
HAZARD SW
[ON/OFF] The switch status input from the hazard warning 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 Blinks right turn signal lamp.
LH Blinks left turn signal lamp.
OFF Turns turn signal lamps (right and left) OFF.
Revision: March 2010 2008 QX56