System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

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	BCM transmits sleep wake up signal to each unit when condition is established, and then goes into each mode. BCM transmits sleep wake up signal (sleep) to each unit when condition is established, and then goes into each mode. BCM transmits sleep wake up signal (wake up) to each unit when condition is established, and then goes into each mode. BCM receives the sleep-ready signal (ready) from each unit via CAN communication. BCM receives the sleep-ready signal (not-ready) from each unit via CAN communication.
IPDM E/R	Transmits the sleep-ready signal (ready) to BCM via CAN communication. Transmits the sleep-ready signal (not-ready) to BCM via CAN communication. Receives the sleep wake up signal from BCM via CAN communication. Receives the sleep wake up signal (sleep) from BCM via CAN communication. Receives the sleep wake up signal (wake up) from BCM via CAN communication.
Combination meter
Intelligent Key unit
AV control unit
TCU
8CH CAN gateway
ABS actuator and electric unit (control unit)
Each switch	Each switch transmits the vehicle status to BCM.

DESCRIPTION

Outline

IPDM E/R incorporates a power consumption control function that reduces the power consumption according to the vehicle status.
IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN communication.
Normal mode (wake-up)
- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.
Low power consumption mode (sleep)
- Low power consumption control is active.
- CAN transmission is stopped.

Sleep Mode Activation

IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communication.
- Outputting signals to actuators
- Output requests are being received from control units via CAN communication.
IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.

Wake-Up Operation

IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep wake up signal (wake up) from the BCM or any of the following conditions are fulfilled. In addition, it transmits a sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.
- Ignition switch ON
- Hood switch status changes.
- An output request is received from a control unit via CAN communication.