Nissan Murano: System / Power Consumption Control System

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

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

DESCRIPTION

• IPDM E/R incorporates a power consumption control function that reduces the power consumption according to the Nissan Murano 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.

  • Front wiper fail-safe operation

  • Outputting signals to actuators

  • Switches or relays operating

  • Auto active test is starting

  • Emergency OFF

  • 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 BCM or any of the following conditions is 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

  • An output request is received from a control unit via CAN communication.

IGNITION BATTERY SAVER LOGIC

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