diagram INFINITI QX56 2011 Factory Workshop Manual

BCS
SYSTEMBCS-7
< SYSTEM DESCRIPTION >
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COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING SYSTEM : System DiagramINFOID:0000000006274790
NOTE:
*: TAIL LAMP switch links lighting switch 1ST and 2ND positions.
COMBINATION SWITCH READING S
YSTEM : System DescriptionINFOID:0000000006274791
OUTLINE
 BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the
status of each switch.
 BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a
maximum of 20 switch status.
COMBINATION SWITCH MATRIX
Combination switch circuit
NOTE:
*: TAIL LAMP switch links lighting switch 1ST and 2ND positions.
Combination switch INPUT-OUTPUT system list
JMMIA0499GB
JMMIA0500GB
System INPUT 1 INPUT 2 INP UT 3 INPUT 4 INPUT 5
OUTPUT 1 — FR WASHER FR WIPER LOW TURN LH TURN RH
OUTPUT 2 FR WIPER HI — FR WIPER AUTO PASSING HEADLAMP 1
Revision: 2010 May2011 QX56

BCS-10
< SYSTEM DESCRIPTION >
SYSTEM
NOTE:
For details of wiper volume dial position, refer to WW-7, "
FRONT WIPER AND WASHER SYSTEM : System Description".
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM : System DiagramINFOID:0000000006274792
SIGNAL BUFFER SYSTEM : System DescriptionINFOID:0000000006274793
OUTLINE
BCM has the signal transmission function that output s/transmits each input/received signal to each unit.
Signal transmission function list
6 OFF ON ON
7 OFF ON OFF
Wiper volume
dial position Switch status
WIP VOLUME 1 WIP VOLUME 2 WIP VOLUME 3
JMMIA0381GB
Signal name Input Output Description
 Ignition switch ON signal
 Ignition switch signal Push-button ignition switch
(Push switch) IPDM E/R (CAN)
 Driver seat control unit (CAN)
 Pre-crash seat
belt control
unit (CAN) Inputs the push-button ignition
switch (push switch) signal and
transmits the ignition switch sta-
tus judged with BCM via CAN
communication.
Door switch signal Any door switch  Combination meter (CAN)
 IPDM E/R (CAN)
 Driver seat control unit (CAN)
 Pre-crash seat
belt control
unit (CAN) Inputs the door switch signal
and transmits it via CAN com-
munication.
Oil pressure switch signal IPDM E/R (CAN) Combination meter (CAN) Transmits the received oil pres-
sure switch signal via CAN
communication.
Revision: 2010 May2011 QX56

BCS
SYSTEMBCS-11
< SYSTEM DESCRIPTION >
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POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTRO
L SYSTEM : System DiagramINFOID:0000000006274794
POWER CONSUMPTION CONTROL SYSTEM : System DescriptionINFOID:0000000006274795
OUTLINE
 BCM incorporates a power saving control function t hat reduces the power consumption according to the
vehicle status.
 BCM switches the status (control m ode) by itself with the power saving control function. It performs the sleep
request to each unit (IPDM E/R, combination meter, dr iver seat control unit, automatic back door control
module, pre-crash seat belt control unit and CAN gat eway) that operates with the ignition switch OFF.
Normal mode (wake-up)- CAN communication is normally performed with other units
- Each control with BCM is operating properly
CAN communication sleep mode (CAN sleep)- CAN transmission is stopped
- Control with BCM only is operating
Stop lamp switch signal Stop lamp switch TCM (CAN) Inputs the stop lamp switch 1
signal and stop lamp switch 2
signal, and transmits it via CAN
communication.
Low tire pressure warning lamp
signal Low tire pressu
re warning con-
trol unit Combination meter (CAN)Transmits the received low tire
pressure warning signal via
CAN communication.
Buzzer request signal Low tire pressu
re warning con-
trol unit Combination meter (CAN)Transmits the received buzzer
request signal via CAN commu-
nication.
Horn request signal Low tire pressu
re warning con-
trol unit IPDM E/R (CAN)Received the horn request sig-
nal, transmits the horn reminder
signal via CAN communication.
Signal name Input Output Description
JMMIA0382GB
Revision: 2010 May2011 QX56

BCS-60
< WIRING DIAGRAM >
BCM
WIRING DIAGRAM
BCM
Wiring DiagramINFOID:0000000006274823
JCMWM8293GB
Revision: 2010 May2011 QX56

BCS
BCM
BCS-61
< WIRING DIAGRAM >
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JCMWM8294GB
Revision: 2010 May2011 QX56

BCS-62
< WIRING DIAGRAM >
BCM
JCMWM8295GB
Revision: 2010 May2011 QX56

BCS
BCM
BCS-63
< WIRING DIAGRAM >
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JCMWM8296GB
Revision: 2010 May2011 QX56

BCS-64
< WIRING DIAGRAM >
BCM
JCMWM8297GB
Revision: 2010 May2011 QX56

BCS
BCM
BCS-65
< WIRING DIAGRAM >
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JCMWM8298GB
Revision: 2010 May2011 QX56

BCS-66
< WIRING DIAGRAM >
BCM
JCMWM8299GB
Revision: 2010 May2011 QX56