System Description [08/2015 - ]

WASHER LINKED OPERATION
1. This system operates the front wipers at low speed immediately after spraying a jet of washer fluid when the windshield washer switch is turned on for 0.3 seconds or more. The system operates the front wipers at low speed for approximately 2.2 seconds and then stops operation when the windshield washer switch is turned on for 1.5 seconds or more.
INTERMITTENT OPERATION

Fig 1: Windshield Washer Switch Wiring Diagram [08/2015 - ]
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. The system operates the front wipers once in approximately 1.6 to 10.7 seconds when the windshield wiper switch is turned to the INT position. The intermittent time can be adjusted from 1.6 to 10.7 seconds by using the intermittent time adjust dial.
2. If the windshield wiper switch is turned to the INT position, current flows from the already charged capacitor C1 through terminals INT1 and INT2 of the windshield wiper switch to Tr1 (transistor). When Tr1 turns on, current flows from terminal +S of the windshield wiper switch to terminal +1 of the windshield wiper switch, to terminal +1 of the windshield wiper motor assembly, to the windshield wiper motor assembly and finally to ground, causing the windshield wiper motor assembly to operate. At the same time, current flows from capacitor C1 to terminal INT1 of the windshield wiper switch and then INT2. When the current flow from capacitor C1 ends, Tr1 turns off to stop the relay contact point and halt the windshield wiper motor assembly.
  When the relay contact point turns off, capacitor C1 begins to charge again and Tr1 remains off until charging has been completed. This period corresponds to the intermittent time. When capacitor C1 is fully charged, Tr1 turns on and then the relay contact point turns on, causing the windshield wiper motor assembly to operate again. This cycle is the intermittent operation.
  
  The intermittent time can be adjusted by using the intermittent time adjust dial (variable resistor) to change the charge time of capacitor C1.
3. If the windshield wiper switch is turned to the INT position, current flows from the already charged capacitor C1 through terminals INT1 and INT2 of the windshield wiper switch to Tr1 (transistor). When Tr1 turns on, current flows from terminal +S of the windshield wiper switch to terminal +1 of the windshield wiper switch, to terminal +1 of the windshield wiper motor assembly, to the windshield wiper motor assembly and finally to ground, causing the windshield wiper motor assembly to operate. At the same time, current flows from capacitor C1 to terminal INT1 of the windshield wiper switch and then INT2. When the current flow from capacitor C1 ends, Tr1 turns off to stop the relay contact point and halt the windshield wiper motor assembly.
  When the relay contact point turns off, capacitor C1 begins to charge again and Tr1 remains off until charging has been completed. This period corresponds to the intermittent time. When capacitor C1 is fully charged, Tr1 turns on and then the relay contact point turns on, causing the windshield wiper motor assembly to operate again. This cycle is the intermittent operation.
HEADLIGHT CLEANER SYSTEM (w/ Headlight Cleaner System)
1. The headlight cleaner system operates for a specified period of time when the headlights are on (the engine switch is on [IG]) and the headlight cleaner switch assembly is turned on.
2. The headlight cleaner system operates when the headlights are on (the engine switch is on [IG]) and the windshield wiper switch assembly (windshield washer switch) is turned on. However, the headlight cleaner system only operates when the windshield wiper switch assembly (windshield washer switch) is turned on the first time. After that, the headlight cleaner system cannot be operated with the windshield wiper switch assembly (windshield washer switch) until the engine switch is turned off and then turned to on (IG).
WASHER FLUID LEVEL WARNING SYSTEM
1. When the volume of washer fluid decreases to below a certain level (when the level warning switch assembly is turned on), the multi-information display warns the driver by displaying a message*1 or the combination meter assembly warns the driver by displaying a washer fluid warning light*2.
  1. *1: w/ Multi-information Display
  2. *2: w/o Multi-information Display