Nissan Versa Note. Manual - part 599

PCS-6

< SYSTEM DESCRIPTION >

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

SYSTEM

SYSTEM

RELAY CONTROL SYSTEM
RELAY CONTROL SYSTEM : System Description

INFOID:0000000009578951

SYSTEM DIAGRAM

DESCRIPTION

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.

AWMIA1446GB

PCS

SYSTEM

PCS-7

< SYSTEM DESCRIPTION >

[IPDM E/R (WITH I-KEY)]

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RELAY CONTROL SYSTEM : Fail-safe

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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 LO
• Headlamp HI

EXL-8

Tail lamp relay

Position light request signal

BCM (CAN)

• Parking lamp
• License plate lamp
• Tail  lamp

EXL-11

Illuminations

INL-9

• Front wiper relay
• Front wiper high relay

Front wiper request signal

BCM (CAN)

Front wiper motor

WW-8

Front wiper stop position sig-
nal

Front wiper motor

Starter control relay

Starter control relay signal

BCM (CAN)

Starter motor

STR-9

Transmission range switch 
signal (CVT models)

Transmission range 
switch

Clutch interlock switch signal 
(M/T models)

Clutch interlock switch

• Cooling fan relay-1
• Cooling fan relay-2

Cooling fan speed request sig-
nal

ECM (CAN)

Cooling fan

EC-38

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) 

EC-35

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

Generator

Outputs the power generation command signal (PWM signal) 0%

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  lamp
• License plate lamp
• Illumination
• Tail lamp

• 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

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.

NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.

FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.

When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper

after repeating a front wiper 10 second activation and 20 second stop five times.

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 CONSUMPTION CONTROL SYSTEM

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 lamp

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

Control part

Fail-safe operation

DTC

Ignition switch

Ignition relay

Tail lamp relay

—

ON

ON

—

—

OFF

OFF

—

B2098: IGN RELAY ON

OFF

ON

ON (10 minutes)

B2099: IGN RELAY OFF

ON

OFF

—

Ignition switch

Front wiper switch

Auto stop signal

ON

OFF

Front wiper stop position signal cannot be 
input 10 seconds.

ON

The signal does not change for 10 seconds.

PCS

SYSTEM

PCS-9

< SYSTEM DESCRIPTION >

[IPDM E/R (WITH I-KEY)]

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POWER CONSUMPTION CONTROL SYSTEM : System Description

INFOID:0000000009578953

SYSTEM DIAGRAM

DESCRIPTION

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.

- Outputting signals to actuators

- Switches or relays operating

- 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