WIPER AND WASHER SYSTEM

FUNCTION OF MAIN COMPONENTS

Component	Function
Air Conditioning Amplifier Assembly	Detects the internal temperature and ambient temperature and sends the resulting signals to the air conditioning amplifier assembly.
Central Gateway ECU (Network Gateway ECU)	Relays the signal between the CAN communication.
Combination Meter Assembly	Sends the vehicle speed signal to the main body ECU (multiplex network body ECU). Displays a warning message on the multi-information display when a low washer fluid level signal is received from the level warning switch.
Windshield Washer Motor and Pump Assembly	Activates in accordance with the signal from the windshield wiper motor assembly.
Windshield Wiper Motor Assembly Windshield Wiper ECU	Receives various information and controls washer fluid spraying.
Level Warning Switch	Outputs signals to the combination meter when the remaining amount of washer fluid is equal to or less than the specified value.
Main Body ECU (Multiplex NetworkBody ECU)	Receives signals from various sensors and ECUs and sends them to the windshield wiper motor assembly
Skid Control ECU Assembly	Sends the vehicle speed signal to the combination meter assembly.
Steering Sensor	Sends the wiper control switch and washer switch position signal to the main body ECU (multiplex network body ECU).
Windshield Wiper Switch Assembly Wiper Control Switch Washer Switch	Sends the wiper control switch and washer switch position signal to the steering sensor.

FUNCTION

Washer Control Function
1. The washer fluid spray/stop timing is controlled according to the period of time when the washer switch is turned on. Also, the washer fluid spraying period changes according to the vehicle speed, changes in ambient temperature and wiper switch operation condition.
Short Press Judgment Control (Washer Switch On Time: Less than 0.3 Seconds)
1. When the washer switch is turned on for less than 0.3 seconds, washer fluid only sprays while the switch is turned on. At this time, the wipers do not operate.

AUTO Operation Judgment Control (Washer Switch On Time: 0.3 Seconds or More and Less than or Equal to Period of One Wiper Operation)

When the washer switch is turned on for 0.3 seconds or more, the windshield wiper ECU (windshield wiper motor) judges that an AUTO operation is performed and operates the wipers once and then 2 additional times. The wiper blades are moved to the retracted position while the vehicle is driven and one wiper operation is performed after the vehicle is stopped for approximately 3 seconds (the vehicle speed is approximately 6km/h (4 mph)).

Washer fluid is sprayed when the washer switch is turned on (T1) and again at the start of the downward sweep operation (T2). Washer fluid does not spray for any upward sweep operations after the first.

Vehicle Speed (km/h (mph))	Outside Temperature (°C (°F))	Upward Sweep Operation	Downward Sweep Operation
Vehicle Speed (km/h (mph))	Outside Temperature (°C (°F))	Spraying Period: T1 (seconds)	Spraying Period: T2 (seconds)
Below 80 (50)	15 (59) or more	0.975	0.475
	Higher than 5 (41) to below 15 (59)	1.1	0.6
	5 (41) or less	1.25	0.7
80 (50) or more	15 (59) or more		0.15
	Higher than 5 (41) to below 15 (59)		0.425
	5 (41) or less		0.7

Press and Hold Judgment Control (Washer switch On Time: More than One Complete Wiper Operation)

When the washer switch is turned on for longer than the period of one wiper operation, the windshield wiper ECU (windshield wiper motor) judges that the switch is pressed and held and continues performing wiper operations until the washer switch is turned off. After the wiper switch is turned off, the wipers operate 3 times. The wiper blades are moved to the retracted position while the vehicle is driven and one wiper operation is performed after the vehicle is stopped for approximately 3 seconds (the vehicle speed is approximately 4 km/h (2 mph)).

Tech Tips

When the washer switch is turned on for 40 seconds or more, it is judged as a malfunction and the washer fluid spraying is stopped.

Washer fluid is sprayed when the washer switch is turned on (T1) and at the start of the downward sweep operation (T2). For every wiper operation after the first, washer fluid is sprayed for 0.7 seconds at the start of the upward and downward sweep operations.

Vehicle Speed (km/h (mph))	Outside Temperature (°C (°F))	Washer Fluid Spray time
		First Upward and Downward Sweep Operations		Following Upward and Downward Sweep Operations
		Upward Sweep Operation	Downward Sweep Operation	Upward Sweep Operation/Downward Sweep Operation
		Spraying Period: T1 (seconds)	Spraying Period: T2 (seconds)	Spraying Period: (seconds)
Below 80 (50)	15 (59) or more	0.975	0.475	0.7*
	Higher than 5 (41) to below 15 (59)	1.1	0.6
	5 or less 5 (41) or less	1.25	0.7
80 (50) or more	15 (59) or more		0.15
	Higher than 5 (41) to below 15 (59)		0.425
	5 (41) or less		0.7

*: If the washer switch is turned off while washer fluid is spraying, the spraying stops immediately.

Lo Wiper Operation Control
1. If the washer switch is turned on during a Lo wiper operation, washer fluid is sprayed for 0.35 seconds at the start of upward and downward sweep operations.
  
  Tech Tips
  
  If the washer switch is turned off while washer fluid is spraying, the spraying stops immediately.
Hi Wiper Operation Control
1. If the washer switch is turned on during a Hi wiper operation, washer fluid is sprayed for 0.3 seconds at the start of upward and downward sweep operations.
  
  Tech Tips
  
  If the washer switch is turned off while washer fluid is spraying, the spraying stops immediately.
Washer Fluid Level Warning
1. When the remaining amount of washer fluid is equal to or less than the specified value, "Windshield Washer Fluid Low" is displayed on the multi-information display.