System Description: Outline

BCM incorporates a power saving control function that reduces the power consumption according to the vehicle status.

Low power consumption mode (sleep)

• CAN transmission is stopped to other units
• Each control with BCM is operating low power consumption mode

Normal mode (wake-up)

• CAN communication is normally performed
• Each control with BCM is operating normally

Low power consumption mode activation 

• BCM receives the sleep-ready signal from each unit via CAN communication.
• BCM transmits the sleep wake up signal (sleep) to each unit when receive the sleep-ready signal from each unit.
• Each unit stops the transmission of CAN communication with the sleep wake up signal (sleep).
• BCM perform the low power consumption control when fulfilled with all sleep conditions.

Wake-up operation 

• BCM transmits sleep wake up signal (wake up) to each unit when sleep conditions change, and then goes into normal mode from low power consumption mode.
• Each unit starts transmissions with CAN communication by receiving sleep wake up signal (wake up).
• BCM stop the low power consumption control when fulfilled with any wake up conditions.