Nissan Maxima. Instruction — part 217
BCS
POWER CONSUMPTION CONTROL SYSTEM
BCS-15
< SYSTEM DESCRIPTION >
[BCM]
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POWER CONSUMPTION CONTROL SYSTEM
System Diagram
INFOID:0000000009467036
System Description
INFOID:0000000009467037
OUTLINE
• BCM incorporates a power saving control function that reduces the power consumption according to the
vehicle status.
• BCM switches the status (control mode) by itself with the power saving control function. It performs the sleep
request to each unit (IPDM E/R and combination meter) 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
Low power consumption mode (BCM sleep)
- Low power consumption control is active
- CAN transmission is stopped
LOW POWER CONSUMPTION CONTROL WITH BCM
BCM reduces the power consumption with the following operation in the low power consumption mode.
• The reading interval of the each switches changes from 10 ms interval to 60 ms interval.
Sleep mode activation
• BCM receives the sleep-ready signal (ready) from IPDM E/R and combination meter via CAN communica-
tion.
• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are ful-
filled.
• Each unit stops the transmission of CAN communication with the sleep wakeup signal. BCM is in CAN com-
munication sleep mode.
• BCM is in the low power consumption mode and perform the low power consumption control when all of the
BCM sleep conditions are fulfilled with CAN sleep condition.
ALCIA0030GB
BCS-16
< SYSTEM DESCRIPTION >
[BCM]
POWER CONSUMPTION CONTROL SYSTEM
Sleep condition
Wake-up operation
• BCM changes from the low power consumption mode to the CAN communication sleep mode when any of
the BCM wake-up conditions is fulfilled. Only the control with BCM is activated.
• BCM transmits the sleep wake up signal (wake up) to each unit when any of the CAN wake-up conditions is
fulfilled. It changes from the low power consumption mode or the CAN communication sleep mode to the
normal mode.
• Each unit starts the transmission of CAN communication with the sleep wake up signal. In addition, the com-
bination meter transmits the wake up signal to BCM via CAN communication to report the CAN communica-
tion start.
Wake-up condition
CAN sleep condition
BCM sleep condition
• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm and panic alarm: No operation
• Warning lamp: No operation
• Intelligent Key system buzzer: No operation
• Trunk room lamp switch status: No change
• Brake switch: OFF
• Key slot status: No change
• Turn signal indicator lamp: No operation
• Exterior lamp: OFF
• Door lock status: No change
• CONSULT communication status: No communication
• Meter display signal: Non-transmission
• Door switch status: No change
• Rear window defogger: OFF
• Interior room lamp battery saver: Time out
• RAP system: OFF
• Power window switch communication: No transmission
• Push-button ignition switch (push switch) illumination: OFF
• NATS: No operation
• Remote keyless entry receiver communication status: No com-
munication
• Tire pressure monitor system: Stop
BCM wake-up condition
CAN wake-up condition
• Door unlock sensor: OFF
→ON, ON→OFF
• Front door lock assembly LH (key cylinder switch): Lock or un-
lock
• Door lock switch: OFF
→ON
• Door unlock switch: OFF
→ON
• Trunk lid opener switch: OFF
→ON
• Power window serial link communication: Receiving
• Remote keyless entry receiver: Receiving valid keyfob
• Receiving the sleep-ready signal (Not-ready) from any units
• Key slot: OFF
→ON, ON→OFF
• Push-button ignition switch (push switch): OFF
→ON
• Hazard switch: OFF
→ON
• PASSING switch: OFF
→ON, ON→OFF
• TAIL LAMP switch: OFF
→ON
• Driver door switch: OFF
→ON, ON→OFF
• Passenger door switch: OFF
→ ON, ON → OFF
• Trunk room lamp switch: OFF
→ON, ON→OFF
• Driver door request switch: OFF
→ON
• Passenger door request switch: OFF
→ON
• Trunk opener request switch: OFF
→ON
• Stop lamp switch 2 signal: ON
• Remote keyless entry receiver: Receiving valid keyfob
BCS
POWER CONSUMPTION CONTROL SYSTEM
BCS-17
< SYSTEM DESCRIPTION >
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Component Parts Location
INFOID:0000000009467038
1.
BCM M16, M17, M18, M19, M20,
M21 (view with instrument panel re-
moved)
2.
Combination meter M24
3.
IPDM E/R E16, E17, E18, E200,
E201, F10
AWMIA1468ZZ
BCS-18
< SYSTEM DESCRIPTION >
[BCM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
INFOID:0000000009467039
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions.
DOOR LOCK
Direct Diagnostic Mode
Description
Ecu Identification
The BCM part number is displayed.
Self Diagnostic Result
Displays the diagnosis results judged by BCM.
Data Monitor
The BCM input/output signals are displayed.
Active Test
The signals used to activate each device are forcibly supplied from BCM.
Work support
Changes the setting for each system function.
Configuration
• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
CAN Diag Support Mntr
Monitors the reception status of CAN communication viewed from BCM.
System
Sub System
Direct Diagnostic Mode
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Door lock
DOOR LOCK
×
×
×
×
Rear window defogger
REAR DEFOGGER
×
×
Warning chime
BUZZER
×
×
Interior room lamp timer
INT LAMP
×
×
×
Exterior lamp
HEADLAMP
×
×
×
Wiper and washer
WIPER
×
×
×
Turn signal and hazard warning lamps FLASHER
×
×
×
Intelligent Key system
INTELLIGENT KEY
×
×
×
Combination switch
COMB SW
×
BCM
BCM
×
×
×
×
×
Immobilizer
IMMU
×
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Trunk open
TRUNK
×
×
Vehicle security system
THEFT ALM
×
×
×
RAP system
RETAINED PWR
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS
AIR PRESSURE MONITOR
×
×
×
×
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