Nissan X-Trail 32. Manual - part 1660

PCS-10

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

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

IGNITION RELAY CONTROL

• IPDM E/R monitors the voltage at the contact circuit of the ignition relay inside it. 
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit.

B20DB

HEIGHT SENS INITIALIZE NOT DONE

[MISSING 
CALIBRA-
TION]

Right and left headlamp aiming motors fix at the initial 
aiming position.

[NOT CON-
FIURED]

B20E2

LED HEADLAMP RH

[CMPNENT 
INTERNAL 
MLFNCTN]

Transmits the headlamp warning signal (CAN communi-
cation) to the combination meter when the headlamp (LO) 
ON conditions are satisfied. (When the ignition switch 
turns ON, the headlamp warning is displayed on the infor-
mation display of the combination meter.)

B20E3

LED HEADLAMP LH

[CMPNENT 
INTERNAL 
MLFNCTN]

Transmits the headlamp warning signal (CAN communi-
cation) to the combination meter when the headlamp (LO) 
ON conditions are satisfied. (When the ignition switch 
turns ON, the headlamp warning is displayed on the infor-
mation display of the combination meter.)

DTC

CONSULT display description

Fail-safe

Control part

Fail-safe operation

Cooling fan

• The cooling fan is operated at HI operation when the ignition switch is turned ON.
• Turn OFF the cooling fan operation when the ignition switch is turned OFF.

A/C compressor

A/C relay OFF

Control part

Fail-safe operation

Headlamp

• Turns ON the headlamp (LO) when the ignition switch is turned ON.
• Turns OFF the headlamp (LO) when the ignition switch is turned OFF.
• Headlamp (HI): OFF

• Parking  lamp
• License plate lamp
• Illumination
• Tail lamp

• Turns ON the tail lamp, parking lamp, license plate lamp and each illumination when the ignition 

switch is turned ON.

• Turns OFF the tail lamp, parking lamp, license plate lamp and each illumination when the ignition 

switch is turned OFF.

Front wiper

• 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.

Daytime running light

Daytime running light: OFF

Front fog lamp

Front fog lamp: OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay: OFF

Headlamp washer

Headlamp washer relay: OFF

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay con-

tact side

Ignition relay con-

trol condition

ON

ON

Ignition relay ON normal

—

OFF

OFF

Ignition relay OFF normal

—

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< SYSTEM DESCRIPTION >

[IPDM E/R]

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FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by front wiper stop position signal.
When front wiper stop position signal is in the condition listed below while the front wiper is operating, IPDM E/
R activates the fail-safe.

POWER CONTROL SYSTEM

POWER CONTROL SYSTEM : System Description

INFOID:0000000010741704

SYSTEM DIAGRAM

EACH LAMP CONTROL

IPDM E/R controls the smart FET to control each lamp according to the control signal status of each lamp
received via CAN communication. Refer to 

EXL-21, "HEADLAMP SYSTEM : System Description"

 (LED head-

lamp) or 

EXL-225, "HEADLAMP SYSTEM : System Description"

 (halogen headlamp).

COOLING FAN CONTROL

IPDM E/R controls the cooling fan according to the cooling fan control signal received from ECM via CAN
communication. Refer to 

EC-57, "COOLING FAN CONTROL : System Description"

.

SIGNAL BUFFER SYSTEM

ON

OFF

Ignition relay ON stuck

Detects DTC [B20DD: IGN RELAY ON CIRC]

OFF

ON

Ignition relay OFF stuck

Detects DTC [B20DE: IGN RELAY OFF CIRC]

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay con-

tact side

Ignition relay con-

trol condition

Ignition switch

Front wiper switch

Front wiper stop position signal

Fail-safe

ON

OFF

The signal does not change from the battery 
voltage for 10 seconds.

Stops front wiper power supply 
for 20 seconds

Except OFF

The signal does not change for 10 seconds.

JMMIA1810GB

PCS-12

< SYSTEM DESCRIPTION >

[IPDM E/R]

SYSTEM

SIGNAL BUFFER SYSTEM : System Description

INFOID:0000000010741705

SYSTEM DIAGRAM

DESCRIPTION

• IPDM E/R reads the status of the hood switch and transmits the hood switch signal to ECM and BCM via

CAN communication.

• IPDM E/R receives the oil pressure switch signal from oil pressure switch and transmits the oil pressure sig-

nal to BCM via CAN communication.

• IPDM E/R receives the reverse position signal from transmission range switch and transmits the reverse

position signal to BCM via CAN communication. (CVT models)

• IPDM E/R receives the reverse position signal and neutral position signal from reverse/neutral position

switch. IPDM E/R transmits the reverse position signal and neutral position signal to BCM via CAN commu-
nication. (With MR20 engine with M/T models)

• IPDM E/R receives the reverse position signal from back-up lamp switch and transmits the reverse position

signal to BCM via CAN communication. (With R9M engine and M/T models)

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM : System Description

INFOID:0000000010741706

SYSTEM DIAGRAM

DESCRIPTION

Outline

JMMIA1830GB

JMMIA1815GB

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• 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
- 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
- Hood switch status changes.
- An output request is received from a control unit via CAN communication.

ENERGY MANAGEMENT SYSTEM

ENERGY MANAGEMENT SYSTEM : System Description

INFOID:0000000010931269

SYSTEM DIAGRAM

IPDM E/R has an energy management system that recognizes the battery status from the battery current sig-
nal from the battery current sensor, the battery temperature sensor signal, and the battery voltage from the
battery and maintains normal battery status. Refer to the following for details.
• Charging system control: 

CHG-8, "ENERGY MANAGEMENT SYSTEM : System Description"

• Stop/Start system control: 

EC-856, "STOP/START SYSTEM : System Description (CVT models)"

 or 

EC-848,

"STOP/START SYSTEM : System Description (M/T models)"

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JMMIA1780GB