Murano FWD V6-3.5L (VQ35DE) (2006)
Power Distribution Module: Description and Operation
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
System Description
-
IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block which were originally placed in engine
compartment. It controls integrated relay via IPDM E/R control circuit.
-
IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control, oil pressure switch signal, and hood
switch signal reception, etc.
-
It controls operation of each electrical part via ECM, BCM and CAN communication lines.
CAUTION: None of the IPDM E/R-integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
IPDM E/R receives a request signal from each control unit with CAN communication. It controls each system.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L line, CAN H line), it is possible to transmit
maximum amount of information with minimum wiring. Each control unit can transmit and receive data, and reads necessary information only.
1. Fail-safe control
-
When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers
normally, it also returns to normal control.
-
Operation of control parts by IPDM E/R during fail-safe mode is as given in the table.
IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.
1. CAN communication status
-
CAN communication is normally performed with other control units.
-
Individual unit control by IPDM E/R is normally performed.
-
When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status