System Description

SYSTEM DIAGRAM 

Courtesy of NISSAN NORTH AMERICA, INC.

INPUT SIGNAL AND OUTPUT SIGNAL 

Major signal transmission between each unit via communication is shown in the following table:

Component parts	Signal description
IPDM E/R	Each unit transmits the sleep-ready signal (ready) to the BCM when all of the CAN sleep conditions are fulfilled. Each unit transmits the sleep-ready signal (not-ready) to the BCM when all of the CAN sleep conditions are fulfilled. Each unit receives the sleep wake up signal (sleep) from the BCM via CAN communication. Each unit receives the sleep wake-up signal (wake up) from the BCM via CAN communication.
Combination meter
Intelligent Key unit
AV control unit
8CH CAN gateway
BCM	BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are fulfilled. BCM transmits the sleep wake-up signal (wake up) to each unit when all of the CAN sleep conditions are fulfilled. BCM receives the sleep-ready signal (ready) from each unit via CAN communication. BCM receives the sleep-ready signal (not-ready) signal from each unit via CAN communication.

DESCRIPTION 

Outline 

• The IPDM E/R incorporates a power consumption control function that reduces the power consumption according to the vehicle status.
• The 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
  • Switches or relays operating
  • 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 

• The 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 when any of the following conditions are fulfilled. In addition, it transmits a sleep-ready signal (not-ready) to the BCM via CAN communication to report the CAN communication start.
  • Ignition switch ON
  • An output request is received from a control unit via CAN communication.

Ignition Battery Saver Logic 

If the ignition switch is ON for a period of time with the engine OFF, the IPDM E/R and BCM turn OFF to save the battery.