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.
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.
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.
BCM calculates the intermittent operation delay interval from the following
Vehicle speed signal (received from the combination meter with CAN communication)
Wiper intermittent dial position
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).
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 front washer motor is grounded through the combination switch when the front washer switch is ON.