IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2005 August 2005 350Z
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
? Process to stop CAN communication is activated.
? All systems controlled by IPDM E/R are stopped. When 3 seconds have elapsed after CAN communi-
cation with other control units is stopped, mode switches to sleep status.
3. Sleep status
? IPDM E/R operates in low power mode.
? CAN communication is stopped.
? When a change in CAN communication line is detected, mode switches to CAN communication status.
? When a change hood switch or ignition switch signal is detected, mode switches to CAN communica-
CAN Communication System Description AKS00A2I
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicles are equipped with many electronic control units and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Unit AKS00A2J
Refer to LAN-21, "CAN Communication Unit" .
Function of Detecting Ignition Relay Malfunction AKS00A2K
? When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail
and parking lamps for 10 minutes to indicate ignition relay malfunction.
? When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.
When the ignition switch is turned ON, the tail lamp is OFF.
Ignition switch signal Ignition relay status Tail lamp relay
ON ON ?
OFF OFF ?
ON OFF ?
OFF ON ON (10 minutes)