Component Tests and General Diagnostics

INSPECT FRONT WIPER AND WASHER SWITCH CONTINUITY
If continuity is not as specified, replace the switch.

INSPECT INTERMITTENT OPERATION
a. Turn the wiper switch to INT position.
b. Turn the intermittent time control switch to FAST position.




c. Connect the positive (+) lead from the battery to terminal 16 and the negative (-) lead to terminal 2.
d. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 2, check that the meter needle indicates battery positive voltage.







e. After connecting terminal 16 to terminal 17, connect it to terminal 2, check the voltage rises from 0 volt to battery positive voltage within the time, as shown in the table.
If operation is not as specified, replace the wiper and washer switch.







INSPECT WASHER LINKED OPERATION
a. Connect the positive (+) lead from the battery to terminal 16 and the negative (-) lead to terminal 2.
b. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 2.
c. Push in the washer switch, and check that the voltage changes as shown in the table.
If operation is not as specified, replace the wiper and washer switch.

INSPECT WIPER SWITCH CIRCUIT







Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown.
If circuit is not as specified, inspect the circuits connected to other parts.

Low Speed:

INSPECT FRONT WIPER MOTOR OPERATION




Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 5, check that the motor operates at low speed.
If operation is not as specified, replace the motor.

High Speed:

INSPECT FRONT WIPER MOTOR OPERATION




Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 5, check that the motor operates at high speed.
If operation is not as specified, replace the motor.

Stopping at Stop Position:

INSPECT FRONT WIPER MOTOR OPERATION




a. Operate the motor at low speed and stop the motor operation anywhere except at the stop position by disconnecting positive (+) lead from terminal 1.




b. Connect terminals 1 and 3.
c. Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 5, check that the motor stops running at the stop position after the motor operates again.
If operation is not as specified, replace the motor.

INSPECT WIPER MOTOR CIRCUIT







Disconnect the connector from the motor and inspect the connector on the wire harness side.
If circuit is not as specified, inspect the circuits connected to other parts.

INSPECT WASHER MOTOR OPERATION




Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the motor operates.

NOTE: These tests must be performed quickly (within 20 seconds) to prevent the coil from burning out.

If operation is not as specified, replace the motor.

INSPECT WASHER MOTOR CIRCUIT







Disconnect the connector from the washer motor and inspect the connector on harness side.
If circuit is not as specified, inspect wire harness, power source or wiper switch.