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 20 ms interval.

Sleep mode activation

BCM receives the sleep-ready signal (ready) from IPDM E/R, combination meter and Intelligent Key unit via CAN communication.
BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are fulfilled.
Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN communication 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.

Sleep condition

SLEEP CONDITION CHART

CAN sleep condition	BCM sleep condition
Receiving the sleep-ready signal (ready) from all units Ignition switch: OFF Vehicle security system alarm: No operation Warning lamp: No operation Warning chime: No operation Stop lamp switch: OFF Key switch status: No change for 2 seconds Hazard warning lamp: No operation Exterior lamp: OFF Door lock status: No change for 2 seconds CONSULT-III communication status: No communication Door switch status: No change for 2 seconds	The controls only BCM are completed. (Interior room lamp battery saver: Time out etc.)

CAN sleep condition

BCM sleep condition

The controls only BCM are completed. (Interior room lamp battery saver: Time out etc.)