System Description
SYSTEM
FRONT WIPER AND WASHER SYSTEM : System Description
SYSTEM DIAGRAM
OUTLINE
The front wiper is controlled by each function of BCM and IPDM E/R.
- Combination switch reading function
- Front wiper control function
- Front wiper control function
- Relay control function
Combination meter indicates low washer fluid warning judged by the signal from the washer level switch. For details of low washer fluid warning, refer to "MASTER WARNING LAMP : System Description" Master Warning Lamp.
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 via 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 HI/LO 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 via CAN communication according to the front wiper LO operating condition.
- Power 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 via CAN communication according to the front wiper HI operating condition.
- Power 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 via CAN communication depending on the front wiper INT operating condition and intermittent operation delay interval according to the wiper intermittent dial position.
- Power 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 via CAN communication.
- BCM transmits the front wiper request signal (INT) again after the intermittent operation delay interval.
NOTE:
Factory setting of the front wiper intermittent operation is operation not linked with vehicle speed. Front wiper intermittent operation can be set to operation linked or not linked with vehicle speed using CONSULT. Refer to
"WIPER : CONSULT Function WIPER" CONSULT-III Function(BCM).
Front wiper intermittent operation with vehicle speed
- BCM calculates the intermittent operation delay interval from the following
- Vehicle speed signal
- Wiper intermittent dial position
Unit: Second
*: When operation setting is not linked with vehicle speed.
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.
NOTE:
- BCM stops the transmitting of the front wiper request signal when the power switch is OFF.
- IPDM E/R turns the front wiper relay OFF when the power switch is OFF.
FRONT WIPER OPERATION LINKED WITH WASHER
- BCM transmits the front wiper request signal (LO) to IPDM E/R via 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.
- Turn power 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.
FRONT WIPER SERVICE POSITION OPERATION
- Front wiper operates in LO, stops, and then stays in lock back position when front washer switch is turned
ON while power switch is OFF.
- BCM transmits front wiper service position signal via CAN communication according to the front wiper service position function operating conditions.
- Turn power switch OFF (within 1 minutes)
- Front washer switch ON (0.4 second or more)
- Front wiper operates at LO and then stops when IPDM E/R detects front wiper service position signal.
- Front wiper service position function is cancelled when front wiper washer switch is turned ON again within 1
minute after turning power switch OFF. If 1 minute or more is passed after turning power switch OFF, front wiper service position function is cancelled when power switch is turned ON again, and then front wiper switch (INT, LO, HI, MIST or WASHER) is turned ON.
NOTE:
Front wiper does not operate even if front wiper switch (INT, LO, or HI) is ON when power switch is turned ON
while front wiper is stopped according to front wiper service position function.
WIPER LINKED AUTO LIGHTING FUNCTION (EXCEPT FOR CANADA)
When light switch is in the AUTO position, front wiper operates, and then headlamp illuminates. Refer to EXL14, "AUTO LIGHT SYSTEM (EXCEPT FOR CANADA) : System Description".