Nissan Murano Z51. Manual - part 1532

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< SYSTEM DESCRIPTION >

FRONT WIPER AND WASHER SYSTEM

• IPDM E/R turns ON the integrated front wiper relay and the front wiper high relay according to the front wiper

request signal (HI).

FRONT WIPER AUTO OPERATION

Rain Sensing

Rain level and sensor conditions are detected by rain sensor.
• BCM transmits the vehicle conditions (vehicle speed, front wiper condition, rain sensor sensitivity setting,

etc.) to the rain sensor via the rain sensor serial link.

• Rain sensor judges a wiping speed for front wiper by rain condition and the vehicle conditions. And it trans-

mits the wiping speed request signal to the BCM via the rain sensor serial link.

Auto Wiping Operation 

• BCM receives the wiping speed request signal from the rain sensor via the rain sensor serial link.
• BCM controls front wiper operation according to the wiping speed request signals. And it transmits the front

wiper request signals (LO or HI) to the IPDM E/R via CAN communication line.

Front wiper AUTO operating condition

- Ignition switch ON
- Front wiper switch INT/AUTO
NOTE:
When the front wiper switch is turned to INT/AUTO position, front wiper operates once regardless of a rainy
condition.

Rain Sensor Sensitivity Setting

BCM determines rain sensor sensitivity according to a wiper volume.

NOTE:
When the wiper volume is turned up at 1 level with front wiper AUTO operating condition, front wiper operates
once.

FRONT WIPER AUTO STOP OPERATION

• BCM stops transmitting the front wiper request signal when the front wiper switch is turned OFF.
• IPDM E/R detects the front wiper stop position signal from the front wiper motor and detects the front wiper

motor position (stop position/except stop position).

• When the front wiper request signal is stopped, IPDM E/R turns ON the front wiper relay until the front wiper

motor returns to the stop position.

Wiper volume dial position

Sensitivity

1

High sensitivity

2

3

Medium

−

high sensitivity

4

5

Low

−

medium sensitivity

6

7

Low sensitivity

JPLIA0410GB

FRONT WIPER AND WASHER SYSTEM

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NOTE:
• BCM stops the transmitting of the front wiper request signal when the ignition switch is OFF.
• IPDM E/R turns the front wiper relay OFF when the ignition switch is OFF.

FRONT WIPER OPERATION LINKED WITH WASHER

• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the

washer linked operating condition of the front wiper.

• BCM transmits the front wiper request signal (LO) so that the front wiper operates approximately 2 times

when the front washer switch OFF is detected.

Washer linked operating condition of front wiper

- Ignition switch ON
- Front washer switch ON (0.4 second or more)
• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).
• The washer pump is grounded through the combination switch with the front washer switch ON.

FAIL-SAFE FUNCTION

Front Wiper control

IPDM E/R performs the fail-safe function when the front wiper auto stop circuit is malfunctioning. Refer to

PCS-30, "Fail-safe"

.

Rain Sensor Malfunction

• BCM judges the rain sensor serial link error by the rain sensor serial link condition and detects the rain sen-

sor malfunction by rain sensor malfunction signal.

• When BCM detects the rain sensor serial link error or the rain sensor malfunction while front wiper AUTO

operation, BCM operates a fail-safe control.
NOTE:
If rain sensor malfunction is detected when ignition switch is turned OFF 

⇒

 ON and front wiper switch is INT/

AUTO position, BCM operates front wiper LO.

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< SYSTEM DESCRIPTION >

FRONT WIPER AND WASHER SYSTEM

WITH RAIN SENSOR : Component Parts Location

INFOID:0000000005515995

WITH RAIN SENSOR : Component Description

INFOID:0000000005515996

1.

Combination switch

2.

Combination meter

3.

Rain sensor

4.

Washer pump

5.

Front wiper motor

6.

IPDM E/R

7.

BCM

A.

Wind shield upper

B.

Radiator core support (RH)

C.

Cowl top, left side of engine room

D.

Engine room (left side)

E.

Behind combination meter

JPLIA0883ZZ

Part

Description

BCM

• Judges each switch status by the combination switch reading function.
• Requests (with CAN communication) the front wiper relay and the front wiper high relay ON to 

IPDM E/R.

IPDM E/R

• Controls the integrated relay according to the request (with CAN communication) from BCM.
• Performs the auto stop control of the front wiper.

FRONT WIPER AND WASHER SYSTEM

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WITHOUT RAIN SENSOR

WITHOUT RAIN SENSOR : System Diagram

INFOID:0000000005515997

WITHOUT RAIN SENSOR : System Description

INFOID:0000000005515998

OUTLINE

The front wiper is controlled by each function of BCM and IPDM E/R.

Control by BCM

• Combination switch reading function
• Front wiper control function

Control by IPDM E/R

• Front wiper control function
• Relay control function
Combination meter indicates low washer fluid warning judged with the signal from the washer level switch. For
details of low washer fluid warning, refer to 

MWI-26, "INFORMATION DISPLAY : System Description"

.

FRONT WIPER BASIC OPERATION

• BCM detects the combination switch condition by the combination switch reading function.
• BCM transmits the front wiper request signal to IPDM E/R with CAN communication depending on each

operating condition of the front wiper.

• IPDM E/R turns ON/OFF the integrated front wiper relay and the front wiper high relay according to the front

wiper request signal. IPDM E/R provides the power supply to operate the front wiper HI/LO operation.

FRONT WIPER LO OPERATION

• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the

front wiper LO operating condition.

Front wiper LO operating condition

- Ignition switch ON
- Front wiper switch LO or front wiper switch MIST (while pressing)
• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).

FRONT WIPER HI OPERATION

• BCM transmits the front wiper request signal (HI) to IPDM E/R with CAN communication according to the

front wiper HI operating condition.

Combination switch
(Wiper & washer switch)

Refer to 

BCS-9, "System Diagram"

.

Combination meter

Transmits the vehicle speed signal to BCM with CAN communication.

Rain sensor

Detects water droplets on the windshield with infrared rays, and transmits the rain sensor signal 
to BCM through the rain sensor serial link.

Part

Description

JPLIA1261GB