Nissan Frontier D40. Instruction — part 877
PCS-8
< FUNCTION DIAGNOSIS >
[IPDM E/R]
POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM
System Description
INFOID:0000000005275988
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the ignition
switch and performs the power distribution to each power circuit.
• The ignition switch operation is input to BCM as a signal. BCM changes the power supply position according
to the status and operates the ignition relay (inside IPDM E/R) to supply power to each power circuit.
Component Parts Location
INFOID:0000000005275989
Component Description
INFOID:0000000005275990
Switch
Input Signal to BCM
BCM system
Actuator
Ignition switch
Ignition switch
Power distribution system
• Ignition relay (IPDM E/R)
• ACC relay
• Blower relay
A/T shift selector
P range
Transmission range switch
N, P range
1.
IPDM E/R (contains ignition relay) E118, E119,
E120, E121, E122, E123, E124
2.
BCM (view with lower instrument panel LH re-
moved) M18, M19, M20
ALMIA0312ZZ
BCM
Reference
IPDM E/R
Ignition relay (in IPDM E/R)
Transmission range switch
PCS
POWER CONTROL SYSTEM
PCS-9
< FUNCTION DIAGNOSIS >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
POWER CONTROL SYSTEM
System Diagram
INFOID:0000000005275991
System Description
INFOID:0000000005275992
COOLING FAN CONTROL
IPDM E/R controls the cooling fan according to the status of the cooling fan speed request signal received
from ECM via CAN communication. Refer to
.
AWMIA0527GB
PCS-10
< FUNCTION DIAGNOSIS >
[IPDM E/R]
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM
System Diagram
INFOID:0000000005275993
System Description
INFOID:0000000005275994
IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via
CAN communication. Refer to
AWMIA1129GB
PCS
POWER CONSUMPTION CONTROL SYSTEM
PCS-11
< FUNCTION DIAGNOSIS >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
POWER CONSUMPTION CONTROL SYSTEM
System Diagram
INFOID:0000000005275995
System Description
INFOID:0000000005275996
OUTLINE
• IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-
ing to the vehicle status.
• IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com-
munication.
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 communica-
tion.
- 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.
ALCIA0030GB
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