Infiniti G37 Coupe. Manual - part 1433

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< FUNCTION DIAGNOSIS >

FRONT WIPER AND WASHER SYSTEM

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

front wiper INT operating condition and intermittent operation delay interval according to the wiper intermit-
tent dial position.

Front wiper INT operating condition

- Ignition switch ON
- Front wiper switch INT
• IPDM E/R turns ON the integrated front wiper relay 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 auto stop

signal received from IPDM E/R with CAN communication.

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

NOTE:
Front wiper intermittent operation can be set to the operation with vehicle speed by CONSULT-III. Refer to

WW-11, "WIPER : CONSULT-III Function (BCM - WIPER)"

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Front wiper intermittent operation with vehicle speed

• BCM calculates the intermittent operation delay interval from the following
- Vehicle speed signal (received from the unified meter and A/C amp. with CAN communication)
- Wiper intermittent dial position

*: When without vehicle speed setting

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 (3.1MPH) 

or more or less 

than 35km/h (21.7 

MPH)

35 km/h (21.7 

MPH) or more or 

less than 65km/h 

(40.4 MPH)*

65 km/h 

(40.4MPH) or 

more

1

Short

↑

↓

Long

0.8

0.6

0.4

0.24

2

4

3

2

1.2

3

10

7.5

5

3

4

16

12

8

4.8

5

24

18

12

7.2

6

32

24

16

9.6

7

42

31.5

21

12.6

JPLIA0094GB

FRONT WIPER AND WASHER SYSTEM

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< FUNCTION DIAGNOSIS >

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• 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 OFF.
• IPDM E/R turns the front wiper relay OFF when the ignition switch 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 when the front washer switch ON.

FRONT WIPER FAIL

−

SAFE OPERATION

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

PCS-30, "Fail Safe"

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JPLIA0095GB

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< FUNCTION DIAGNOSIS >

FRONT WIPER AND WASHER SYSTEM

Component Parts Location

INFOID:0000000001629605

1.

Combination switch

2.

BCM

3.

IPDM E/R

4.

Washer pump

5.

Washer level switch

6.

Front wiper motor

7.

Unified meter and A/C amp.

A.

Dash side lower (Passenger side) 

B.

Engine room dash panel (RH)

C.

Radiator core support (RH)

D.

Cowl top, left side of engine room

E.

Behind cluster lid C

JPLIA0592ZZ

FRONT WIPER AND WASHER SYSTEM

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Component Description

INFOID:0000000001629606

Part

Description

BCM

• Judges the 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 & washer switch)

Refer to 

BCS-5, "System Description"

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Unified meter and A/C amp.

Transmits the vehicle speed signal to BCM with CAN communication.