Infiniti FX35, FX50 (S51). Manual — part 208

BCS

SIGNAL BUFFER SYSTEM

BCS-13

< SYSTEM DESCRIPTION >

Interlock/PNP switch signal

TCM

IPDM E/R

Inputs the selector lever P/N po-
sition signal, and transmits the
interlock/PNP switch signal via
CAN communication.

Low tire pressure warning lamp
signal

Low tire pressure warning con-
trol unit

Combination meter (through
unified meter and A/C amp.)
(CAN)

Transmits the received low tire
pressure warning signal via
CAN communication.

Signal name

Input

Output

Description

BCS-14

< SYSTEM DESCRIPTION >

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM

System Diagram

INFOID:0000000005249306

System Description

INFOID:0000000005249307

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, combination meter (unified meter and A/C amp.), driver seat control unit,
pre-crash seat belt control unit and CAN gateway] 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 unified meter and A/C amp. via CAN com-

munication.

• 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 wake up 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.

JMMIA0296GB

BCS

POWER CONSUMPTION CONTROL SYSTEM

BCS-15

< SYSTEM DESCRIPTION >

Sleep condition

Wake-up operation

• BCM changes from the low power consumption mode to the CAN communication sleep mode when the 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 uni-

fied meter and A/C amp. transmits the wake up signal to BCM via CAN communication to report the CAN
communication 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 and panic alarm: Not operation
• Warning chime: Not operation
• Intelligent Key system buzzer: Not operation
• Stop lamp switch: OFF
• ICC brake hold relay (with ICC): OFF
• Key slot (card switch) status: No change
• Turn signal indicator lamp: Not operation
• Exterior lamp: OFF
• Door lock status: No change
• CONSULT-III communication status: Not 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 illumination: OFF
• Infiniti Vehicle Immobilizer System (IVIS) - NATS: Not operation
• Remote keyless entry receiver communication status: No com-

munication

• LOCK indicator lamp: OFF
• ACC indicator lamp: OFF
• ON indicator lamp: OFF

BCM wake-up condition

CAN wake-up condition

• Power window switch communication: Receiving
• Remote keyless entry receiver: Receiving

• Receiving the sleep-ready signal (Not-ready) from any units
• Key slot (key switch): OFF

→

ON, ON

→

OFF

• Push-button ignition switch (push switch): OFF

→