Washer Motor Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Washer Motor Circuit

Washer Motor Circuit

DESCRIPTION

This circuit sends a front washer switch ON/OFF signal to ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Start the inspection from step 1 in the case of using the intelligent tester, and start from step 2 in the case of not using the intelligent tester.

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to DLC3.
(b) Turn the ignition switch to ON and the Techstream main switch to ON.
(c) Select the item "WASHER SW" in the DATA LIST and read its value displayed on the intelligent tester.
Standard:
Ignition switch ON and front washer switch ON
ON
Ignition switch ON and front washer switch OFF
OFF
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
2. CHECK WINDSHIELD WASHER FUNCTION
(a) Turn the ignition switch to ON.
(b) Turn the front washer switch to ON.
(c) Check that the front washer is ON.
Standard:
Front washer function is normal.
NG -- INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER ECU - WINDSHIELD WIPER SWITCH)
(a) Check for open and short circuit in the harness and the connector between terminal WASH of the windshield wiper ECU and the windshield wiper switch.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY





(a) Continuity Check
(1) Check the continuity of each terminal of the windshield wiper switch.
Front Washer Switch:






NG -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
OK -- Continue to next step.
5. INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY





(a) Washer motor (front) operation Check
(1) Pour water into the washer jar with the washer motor and the pump installed to the washer jar assembly.
(2) Connect the battery (+) to terminal 1 of the washer motor and the pump and the battery (-) to terminal 2 of the washer motor and the pump. Check that the water comes out from the washer jar.
NG -- REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR
(a) Check for open and short circuit in the harness and the connector between the fuse and the front washer motor.
(b) Check for open and short circuit in the harness and the connector between the front washer motor and the windshield wiper switch.
(c) Check for open and short circuit in the harness and the connector between the windshield wiper switch and body ground.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE