Windshield Washer Motor: Description and Operation

1. LOW SPEED OPERATION
When the Wiper SW is turned to LO position, current flows from the WIPER Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 7 --> TERMINAL 3 of the Wiper Motor --> TERMINAL 4 --> GROUND, causing the Wiper Motor to operate at low speed. Input of a signal to TERMINAL 10 of the Wiper Control Relay from TERMINAL 1 of the Wiper Motor at this time causes the Wiper Control Relay to operate as explained for INT position operation.

2. HIGH SPEED OPERATION
When the Wiper SW is turned to HIGH position, a signal is input to TERMINAL 4 of the Wiper control Relay from TERMINAL 6 of the Wiper and Washer SW [Comb. SW]. The Wiper control Relay sends current from the WIPER Fuse to TERMINAL 7 of the Wiper Control Relay --> TERMINAL 8 --> TERMINAL 5 of Wiper Angle Control Motor --> TERMINAL 6 --> TERMINAL 9 of Wiper Control Relay --> TERMINAL 14 --> GROUND, causing the Wiper Angle Control Motor to rotate until the No.2 SW inside the Wiper Angle Control Motor is ON and the No.3 SW is OFF. Simultaneously, current flows from the WIPER Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 13 --> TERMINAL 2 of Wiper Motor --> TERMINAL 4 --> GROUND, causing the Wiper Motor to operate at high speed.

3. INT POSITION
When the Wiper SW is turned to INT position, current flows from TERMINAL 14 of the Wiper and Washer SW [Comb. SW] to TERMINAL 3 of the Wiper Control Relay. The Wiper control Relay does not operate When No.1 SW inside the Wiper Angle Control Motor is ON. At other times, when No.3 SW inside the Wiper Angle Control Motor is ON, current flows from the WIPER Fuse to TERMINAL 7 of Wiper Control Relay --> TERMINAL 8 --> TERMINAL 5 of Wiper Angle Control Motor --> TERMINAL 6 --> TERMINAL 9 of Wiper Control Relay --> TERMINAL 14 --> GROUND, causing the Wiper Angle Control Motor to rotate until No.1 SW inside the Wiper Angle Control Motor is turned ON.

When No.3 SW inside Wiper Angle Control Motor is OFF, current flows from the Wiper Fuse to TERMINAL 7 of the Wiper control Relay --> TERMINAL 9 --> TERMINAL 6 of Wiper Angle Control Motor --> TERMINAL 5 -->TERMINAL 8 of Wiper Control Relay -->TERMINAL 14 -->GROUND, rotating the Wiper Angle Control Motor until No.1 SW inside the Wiper Angle Control Motor is turned ON. Simultaneously, current from the Wiper Fuse flows to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 16 --> GROUND, activating the intermittent circuit of the Wiper Relay. This causes current to flow from the WIPER Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 7 --> TERMINAL 3 of Wiper Motor --> TERMINAL 4 --> GROUND, activating the Wiper Motor. The intermittent operation is controlled by the charged/discharged state of the Condenser inside the Wiper Relay.

By adjusting the "INT Time" control volume SW, the Condenser recharge interval is adjusted, thereby charging the intermittent interval.

4. MIST POSITION
When the Wiper SW is turned to MIST position, current flows from the WIPER Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 16 --> GROUND, activating the Mist circuit of the Wiper Relay. Accordingly, when the Wiper SW [Comb. SW] is at OFF or INT position only, current flows from the WIPER Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 7 --> TERMINAL 3 of Wiper Motor -->TERMINAL 4 --> GROUND, activating the Wiper Motor. At this time, input of a signal to TERMINAL 10 of the Wiper Control Relay from TERMINAL 1 of the Wiper Motor causes the Wiper Control Relay to operate as described for INT position operation.

5. OFF POSITION
When the Wiper SW is turned to OFF position from another position and a signal is output from the Wiper and Washer SW [Comb. SW], and a Wiper Motor stop signal is input to TERMINAL 10 of the Wiper control Relay from TERMINAL 1 of the Wiper Motor the Wiper control Relay then sends current from the WIPER Fuse to TERMINAL 7 of the Wiper Control Relay --> TERMINAL 9 --> TERMINAL 6 of Wiper Angle Control Motor --> TERMINAL 5 --> TERMINAL 8 of Wiper Control Relay --> TERMINAL 14 --> GROUND, causing the Wiper Angle Control Motor to rotate until the No.2 SW and No.3 SW inside the Wiper Angle Control Motor both turn ON.

When the switching Connector on the Wiper Motor is turned OFF, the operation explained above is cancelled.

6. WASHER LINKED OPERATION
When the Washer SW is turned ON, current flows from the WIPER Fuse to TERMINAL 2 of the Washer Motor --> TERMINAL 1 --> TERMINAL 8 of Wiper and Washer SW [Comb. SW] --> TERMINAL 16 --> GROUND, causing the Washer Motor to operate and the Windshield Washer to spray.

This current flow also activates the Washer linked circuit of the Wiper Relay, so current flows from the Wiper Fuse to TERMINAL 18 of the Wiper and Washer SW [Comb. SW] --> TERMINAL 7 --> TERMINAL 3 of Wiper Motor --> TERMINAL 4 --> GROUND, activating the Wiper Motor. At this time, input of a signal to TERMINAL 10 of the Wiper Control Relay from TERMINAL 1 of the Wiper Motor causes the Wiper Control Relay to operate as described for INT position operation.

Due to the operation of the Condenser inside the Wiper Relay, the Wiper Motor does not immediately stop when the Washer SW is turned OFF.