• 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.

Front wiper HI operating condition

- Ignition switch ON
- Front wiper switch HI
• 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 INT OPERATION (LINKED WITH VEHICLE SPEED)

ALLIA0427GB

FRONT WIPER AND WASHER SYSTEM

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< FUNCTION DIAGNOSIS >

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

front wiper INT operation condition and the intermittent operation delay interval judged value.

Front wiper INT operating condition

- Ignition switch ON
- Front wiper switch INT

Intermittent operation delay interval judgment

- BCM calculates the intermittent operation delay interval from the vehicle speed signal received from the

wiper dial position and the combination meter with CAN communication.

• IPDM E/R turns the integrated front wiper relay ON so that the front wiper is operated only once according to

the front wiper request signal (INT).

• BCM detects stop position/except stop position of the front wiper motor according to the front wiper stop

position signal received from IPDM E/R with CAN communication.

• BCM transmits the front wiper request signal (INT) again after the intermittent operation delay interval after

the front wiper motor is stopped.

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 auto stop signal from the front wiper motor and detects the front wiper

motor position (stop position/except stop position).

Wiper intermittent dial posi-

tion

Intermittent

operation

interval

Intermittent operation delay Interval (s)

Vehicle speed

Vehicle stopped or

less than 5 km/h

(3.1 MPH)

5 km/h (3.1 MPH)

or more or less

than 35 km/h (21.7

MPH)

35 km/h (21.7

MPH) or more or

less than 65 km/h

(40.4 MPH)

65 km/h (40.4

MPH) or more

Short

↑

↓

Long

0.8

0.6

0.4

0.24

1.2

7.5

4.8

7.2

9.6

31.5

12.6

JPLIA0094GB

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< FUNCTION DIAGNOSIS >

FRONT WIPER AND WASHER SYSTEM

• 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.

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 3 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 front and rear washer motor is grounded through the combination switch with the front washer switch

ON.

FRONT WIPER DROP WIPE OPERATION

• BCM controls the front wiper to operate once according to the conditions of front wiper drop wipe operation.

Front wiper drop wipe operating condition

- Ignition switch ON
- Front wiper switch OFF
- Front washer switch OFF
• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication so that the front

wiper operate once three seconds after front wiper operation linked with washer.

• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).

FRONT WIPER FAIL

−

SAFE OPERATION

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

WW-40, "Fail Safe"

JPLIA0095GB

FRONT WIPER AND WASHER SYSTEM

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< FUNCTION DIAGNOSIS >

Component Parts Location

INFOID:0000000001712143

Component Description

INFOID:0000000001712144

BCM M18, M20 (view with instru-
ment lower panel LH removed)

Front and rear washer motor E105

Washer fluid reservoir

Front wiper motor E23 (view with
cowl top removed)

IPDM E/R E121, E122, E124

Combination switch M28

ALLIA0617ZZ

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.

Combination switch
(Wiper and washer
switch)

Refer to

WW-4, "System Diagram"

Combination meter

Transmits the vehicle speed signal to BCM with CAN communication.

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< FUNCTION DIAGNOSIS >

REAR WIPER AND WASHER SYSTEM

REAR WIPER AND WASHER SYSTEM

System Diagram

INFOID:0000000001712145

System Description

INFOID:0000000001712146

OUTLINE

The rear wiper is controlled by each function of BCM.

Control by BCM

• Combination switch reading function
• Rear wiper control function

REAR WIPER BASIC OPERATION

• BCM detects the combination switch condition by the combination switch reading function.
• BCM controls the rear wiper to start or stop.

REAR WIPER ON OPERATION

• BCM supplies power to the rear wiper motor according to the rear wiper ON operating condition.

Rear wiper ON operating condition

- Ignition switch ON
- Rear wiper switch ON

REAR WIPER INT OPERATION

• BCM supplies power to the rear wiper motor according to the INT operating condition.

Rear wiper INT operating condition

- Ignition switch ON
- Rear wiper switch INT
• BCM controls the rear wiper to operate once.
• BCM detects the rear wiper motor stopping position.
• BCM supplies power to the rear wiper motor after an intermittent from the stop of the rear wiper motor.

REAR WIPER AUTO STOP OPERATION

• BCM stops supplying power to the rear wiper motor when the rear wiper switch is turned OFF.

ALLIA0271GB

JPLIA0165GB

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