System Description
SYSTEM
FRONT WIPER AND WASHER SYSTEM : System Description
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" System Description.
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 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 via CAN communication according to the 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 via CAN communication according to the 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 AUTO OPERATION
Rain Detection
Rain level and sensor conditions are detected by rain sensor.
- BCM transmits the vehicle conditions (vehicle speed, front wiper condition, rain sensor sensitivity setting, etc.) to the rain sensor via the rain sensor serial link.
- Rain sensor judges a wiping speed for front wiper by rain condition and the vehicle conditions. And it transmits the wiping speed request signal to the BCM via the rain sensor serial link.
Auto Wiping Operation
- BCM receives the wiping speed request signal from the rain sensor via the rain sensor serial link.
- BCM controls front wiper operation according to the wiping speed request signals. And it transmits the front wiper request signals (LO or HI) to the IPDM E/R via CAN communication line.
- Ignition switch ON
- Front wiper switch AUTO
NOTE:
- When the front wiper switch is turned to AUTO position, front wiper operates once regardless of rainy conditions.
- Factory setting of the front wiper AUTO operation is operation linked with rain sensor. Front wiper AUTO
operation can be set to operation linked or not linked with rain sensor using CONSULT. Refer to "WIPER : CONSULT Function (BCM WIPER)" CONSULT-III Function(BCM).
Rain Sensor Sensitivity Setting
BCM determines rain sensor sensitivity according to wiper volume dial position.
NOTE:
When the wiper volume dial position is turned up by 1 level under front wiper AUTO operating condition, front wiper operates once.
Splash mode operation
Front wiper is operated at HI regardless of the wiper volume adjustment position, when water drops are instantaneously sprayed over the windshield glass due to water splash from oncoming vehicles or other causes.
After that, AUTO operation is performed depending on the amount of water drops.
- Front wiper switch AUTO
- Ignition switch ON
NOTE:
Splash mode is not operated and auto wiping operation is performed, while the vehicle 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 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 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 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.
- 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 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.
- 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).
NOTE:
Factory setting of the front wiper drop wipe operation is ON. Front wiper drop wipe operation can be set to ON
or OFF using CONSULT. Refer to "WIPER : CONSULT Function (BCM WIPER)" CONSULT-III Function(BCM).
WIPER LINKED AUTO LIGHTING FUNCTION
When light switch is in the AUTO position, front wiper operates, and then headlamp illuminates. Refer to EXL12, "AUTO LIGHT SYSTEM : System Description (Except for CANADA)".