Nissan March K13. Manual — part 481
PCS-6
< SYSTEM DESCRIPTION >
[IPDM E/R (WITH I-KEY)]
SYSTEM
SYSTEM
RELAY CONTROL SYSTEM
RELAY CONTROL SYSTEM : System Diagram
INFOID:0000000005914113
RELAY CONTROL SYSTEM : System Description
INFOID:0000000005914114
IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input sig-
nals from various sensors and the request signals received from control units via CAN communication.
CAUTION:
IPDM E/R integrated relays cannot be removed.
JMMIA0352GB
PCS
SYSTEM
PCS-7
< SYSTEM DESCRIPTION >
[IPDM E/R (WITH I-KEY)]
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RELAY CONTROL SYSTEM : Fail-Safe
INFOID:0000000005984314
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM
If No CAN Communication Is Available With BCM
Control relay
Input/output
Transmit unit
Control part
Reference
page
• Headlamp low relay
• Headlamp high relay
• Low beam request signal
• High beam request signal
BCM (CAN)
• Headlamp low
• Headlamp high
Front fog lamp relay
Front fog lamp request signal
BCM (CAN)
Front fog lamp
Tail lamp relay
Position light request signal
BCM (CAN)
• Parking lamp
• License plate lamp
• Tail lamp
Illuminations
• Front wiper relay
• Front wiper high relay
Front wiper request signal
BCM (CAN)
Front wiper motor
Front wiper stop position sig-
nal
Front wiper motor
Horn relay
Theft warning horn request
signal
BCM (CAN)
Horn
(with panic
alarm func-
tion)
Starter control relay
Starter control relay signal
BCM (CAN)
Starter motor
Starter relay control signal
Steering lock unit condition
signal
Steering lock unit
Transmission range switch
signal
Transmission range switch
Steering lock relay
Steering lock relay signal
BCM (CAN)
Steering lock unit
Steering lock unit condition
signal
Steering lock unit
A/T shift selector (Detention
switch)
A/T shift selector (Detention
switch)
Cooling fan relay
Cooling fan speed request sig-
nal
ECM (CAN)
Cooling fan
A/C relay
A/C compressor request sig-
nal
ECM (CAN)
A/C compressor
(Magnet clutch)
Ignition relay
Ignition switch ON signal
BCM (CAN)
Each control unit,
sensor, actuator and
relay (Ignition power
supply)
Vehicle speed signal (Meter)
Combination meter (CAN)
Push-button ignition switch
signal
Push-button ignition switch
Control part
Fail-safe operation
Cooling fan
• The cooling fan relay turn ON when the ignition switch is turned ON (Cooling fan HI operation)
• The cooling fan relay turn OFF when the ignition switch is turned OFF
A/C compressor
A/C relay OFF
Alternator
Outputs the power generation command signal (PWM signal) 0%
PCS-8
< SYSTEM DESCRIPTION >
[IPDM E/R (WITH I-KEY)]
SYSTEM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to
alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
FRONT WIPER PROTECTION FUNCTION
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop.
NOTE:
This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
POWER CONTROL SYSTEM
Control part
Fail-safe operation
Headlamp
• Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
• Parking lamps
• License plate lamps
• Illuminations
• Tail lamps
• Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper motor
• The status just before activation of fail-safe control is maintained until the ignition switch is
turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control
is activated while the front wiper is set in the INT mode and the front wiper motor is operating.
• Returns automatically wiper to stop position when ignition switch is turned ON if fail-safe control
is activated while front wiper motor is operated and wiper stop in the other position than stop
position.
Front fog lamps
Front fog lamp relay OFF
Horn
Horn OFF
Ignition relay
The status just before activation of fail-safe is maintained.
Starter motor
Starter control relay OFF
Steering lock unit
Steering lock relay OFF
Voltage judgment
IPDM E/R judgment
Operation
Ignition relay contact
side
Ignition relay excitation
coil side
ON
ON
Ignition relay ON normal
—
OFF
OFF
Ignition relay OFF normal
—
ON
OFF
Ignition relay ON stuck
• Detects DTC “B2098: IGN RELAY ON”
• Turns ON the tail lamp relay for 10 minutes
OFF
ON
Ignition relay OFF stuck
Detects DTC “B2099: IGN RELAY OFF”
Ignition switch
Front wiper switch
Front wiper stop position signal
ON
OFF
The front wiper stop position signal (stop position) cannot be input for 10 seconds.
ON
The front wiper stop position signal does not change for 10 seconds.
PCS
SYSTEM
PCS-9
< SYSTEM DESCRIPTION >
[IPDM E/R (WITH I-KEY)]
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POWER CONTROL SYSTEM : System Diagram
INFOID:0000000006036745
POWER CONTROL SYSTEM : System Description
INFOID:0000000006036746
ALTERNATOR CONTROL
IPDM E/R outputs power generation command signal (PWM signal) to the alternator according to the status of
the power generation command value signal received from ECM via CAN communication. Refer to
"POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System Diagram"
.
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM : System Diagram
INFOID:0000000005914116
SIGNAL BUFFER SYSTEM : System Description
INFOID:0000000005914117
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
MWI-10, "OIL PRESSURE WARNING LAMP : System Diagram"
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM : System Diagram
INFOID:0000000006053650
JPMIA0908GB
JMMIA0402GB
JPMIA0731GB
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