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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)]

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

EXL-7

Front fog lamp relay

Front fog lamp request signal

BCM (CAN)

Front fog lamp

EXL-8

Tail lamp relay

Position light request signal

BCM (CAN)

• Parking lamp
• License plate lamp
• Tail lamp

EXL-9

Illuminations

INL-7

• Front wiper relay
• Front wiper high relay

Front wiper request signal

BCM (CAN)

Front wiper motor

WW-6

Front wiper stop position sig-
nal

Front wiper motor

Horn relay

Theft warning horn request
signal

BCM (CAN)

Horn

DLK-17

(with panic

alarm func-

tion)

Starter control relay

Starter control relay signal

BCM (CAN)

Starter motor

SEC-10

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

SEC-10

Steering lock unit condition
signal

Steering lock unit

A/T shift selector (Detention
switch)

Cooling fan relay

Cooling fan speed request sig-
nal

ECM (CAN)

Cooling fan

EC-343

A/C relay

A/C compressor request sig-
nal

ECM (CAN)

A/C compressor
(Magnet clutch)

HAC-13

Ignition relay

Ignition switch ON signal

BCM (CAN)

Each control unit,
sensor, actuator and
relay (Ignition power
supply)

PCS-25

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

Ignition relay ON normal

—

OFF

Ignition relay OFF normal

—

OFF

Ignition relay ON stuck

• Detects DTC “B2098: IGN RELAY ON”
• Turns ON the tail lamp relay for 10 minutes

OFF

Ignition relay OFF stuck

Detects DTC “B2099: IGN RELAY OFF”

Ignition switch

Front wiper switch

Front wiper stop position signal

OFF

The front wiper stop position signal (stop position) cannot be input for 10 seconds.

The front wiper stop position signal does not change for 10 seconds.

PCS

SYSTEM

PCS-9

< SYSTEM DESCRIPTION >

[IPDM E/R (WITH I-KEY)]

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

CHG-8,

"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

Content .. 479 480 481 482 ..