Wiper And Washer System -- System Description |
| WINDSHIELD WASHER OPERATION |
When the front washer switch is ON for 0.3 seconds or more, washer fluid is sprayed. When the front washer switch is ON for 1.5 seconds or more, the system operates the front wipers at low speed for approximately 2.2 seconds.
| INTERMITTENT OPERATION |
The system operates the front wipers according to an adjustable interval time when the front wiper switch is turned to the INT position. The interval can be adjusted between 1.6 to 10.7 seconds using the adjust dial.
If the wiper switch is turned to the INT position, current flows from the already charged capacitor C1 through terminals INT 1 and INT 2 of the wiper control switch to Tr1 (transistor). When Tr1 turns on, current flows in the following manner: wiper switch terminal +S, terminal +1 (same switch), wiper motor terminal +1, wiper motor, ground. As a result, the wiper motor operates. When the current flow to capacitor C1 ends, Tr1 turns off to stop the relay contact point and halts the wiper motor. When the relay contact point turns off, capacitor C1 begins to charge again and Tr1 remains off until charging has been completed. This period of time corresponds to the adjust dial setting. When capacitor C1 is fully charged, Tr1 turns on and then the relay contact point activates, causing the motor to operate. The adjust dial (variable resistor) changes the charge time of capacitor C1.
| REAR WASHER OPERATION |
When the rear wiper and washer switch is turned ON, current flows from the rear wiper motor as follows: rear wiper and washer switch terminal +1R, terminal EW (same switch), ground. As a result, the rear wiper activates.
When the rear wiper and washer switch is turned upward from the ON position:
Current flows as in the previous step.
Current also flows from the rear washer motor and pump as follows: rear wiper and washer switch terminal WR, terminal EW (same switch), ground.
As a result, the rear wiper and washer operate at the same time.
When the rear wiper and washer switch is turned downward from the OFF position, current flows as follows: rear wiper and washer switch terminal WR, terminal EW (same switch), ground.
