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Sedan Service Manual
Electrical & power control » Power control system (PCS)
System

RELAY CONTROL SYSTEM

RELAY CONTROL SYSTEM : System Diagram

RELAY CONTROL SYSTEM : System Diagram

RELAY CONTROL SYSTEM : System Description

IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input signals from various sensors and the request signals received from control units via CAN communication.

CAUTION: To prevent damage to the parts, IPDM E/R integrated relays cannot be removed.

RELAY CONTROL SYSTEM : System Description

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

POWER CONSUMPTION CONTROL SYSTEM : System 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

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

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.