System Description
SYSTEM DIAGRAM
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table:
| Component parts | Signal description |
|---|---|
| BCM |
|
| AV control unit |
|
| Chassis control module | |
| Combination meter | |
| Driver seat control unit | |
| Intelligent Key unit | |
| IPDM E/R | |
| TCU | |
| BOSE speaker amp. (if equipped) | |
| ABS actuator and electric unit (control unit) | |
| Automatic back door control unit | |
| Electric shift control module | |
| Each switch | Each switch transmits the vehicle status to BCM. |
OUTLINE
BCM incorporates a power saving control function that reduces 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 it receives the sleep-ready signal from each unit.
- Each unit stops the transmission of CAN communication with the sleep wake up signal (sleep).
- BCM performs low power consumption control when fulfilled with all sleep conditions.
Sleep condition - Ignition switch OFF (not auto ACC status)
- Interior room lamp power supply OFF
- Navigation and audio system OFF
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 the sleep wake up signal (wake up).
- BCM stops low power consumption control when fulfilled with any wake up conditions.
Wake up condition - Ignition switch OFF → ON
- Door closed → opened
- Door lock / unlock operation