Nissan GT-R (R35) · Service Manual DRIVER CONTROLS

FRONT WIPER AND WASHER SYSTEM

System Diagram


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System Description

 
 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
 
 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.

    • 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

  • 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 intermittent 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 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.
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NOTE：
 Factory setting of the front wiper intermittent operation is the operation without vehicle speed. Front wiper intermittent operation can be set to the operation with vehicle speed by CONSULT-III. Refer to CONSULT-III Function (BCM - WIPER).
 
 Front wiper intermittent operation

BCM determines intermittent operation delay interval according to a wiper volume.

Unit: Second
Wiper intermittent dial position
Intermittent operation interval
Intermittent operation delay Interval (s)
1
Short
↑





↓
Long
0.4
2
2
3
5
4
8
5
12
6
16
7
21

 
 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.

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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 Fail-safe.

Component Parts Location



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1.
 		Combination switch
 		2.
 		Combination meter
 		3.
 		IPDM E/R
4.
 		BCM
 		5.
 		Washer pump
 		6.
 		Front wiper motor
A.
 		Engine room dash panel (RH)
 		B.
 		Dash side lower (Passenger side)
 		C.
 		Radiator core support (RH)
D.
 		Cowl top, left side of engine room




Component Description


Part
 		Description
BCM
  • Detects 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 System Description.
Combination meter
 		Transmits the vehicle speed signal to BCM with CAN communication.