Wipers/Washers System Description - Control/Function
Basic Control/Function
The intelligent controlled wiper system detects the operating angle of the windshield wiper motor in order to recognize the wiping position of the wiper blade assembly. The wiping speed of the windshield wiper motor is controlled according to a target speed map corresponding to the wiping speed (Low or High), to perform wiping speed control. This wiping speed control keeps the wiping speed of the wiper blade assembly at a constant.
Parking and Lip Turn-Over Operation
The intelligent controlled wiper system performs park position control. If the wiper blade assembly is in the park position, the neck and lip of the wiper blade are deformed in one direction. Park position control changes the park position at regular intervals to mitigate the deformation of the wiper blade in a single direction, reducing the deterioration of wiping performance. Every five times the park position control detects a change in vehicle mode from the ON mode to the OFF (LOCK) mode, it controls a change to lower park position or upper park position. When adjusting the position of the wiper arm, it is necessary to stop the wiper motor in the lower park position. It is difficult to identify the park position by eye, so operation is necessary to stop in the lower park position.
Procedure is as follows: Turn the vehicle to the ON mode, and then turn the vehicle to the OFF (LOCK) mode.
Brake-Away Operation
The intelligent controlled wiper system performs blockage detection during wiping and performs obstacle clearance control on detection. The operation of the obstacle clearance control is in the following: If the wiper motor is detected to have stopped for 200 ms or more continuously while operating at maximum drive, a blockage is detected. Reverse action is used if a blockage is detected outside the reversal limit range. If a blockage is detected inside the reversal limit range, the wiper motor stops operation for 800 ms, then resumes wiping. (Blockage removal action) After blockage removal action is detected (counted) five times within the reversal limit range, the wiper is judged to be in a locked state, and the wiper motor stops. After the wiper motor stops, it restarts when the wiper/washer switch is turned off and on again.
Service Position
Operating Condition
When the wiper is active or stops at any position lower than the upper reversal position, press and hold the MIST switch, and then turn the vehicle to the OFF (LOCK) mode to the wiper blades to the service position.
End Conditions
- Vehicle is in the ON mode.
- The upper reversing position is recognized.
Headlight Washer (With Headlight Washer)
The headlight washer operates when the headlight washer switch or the windshield wiper washer switch is operated while the headlights are turned on.