Wiper and Washer Switch Circuit

WIPER AND WASHER SYSTEM: Wiper and Washer Switch Circuit

Wiper and Washer Switch Circuit

DESCRIPTION

This circuit detects the state of the wiper and washer switch and sends it to the windshield wiper relay assembly.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Start the inspection from step 1 when using the Techstream, and start from step 2 when not using the Techstream.

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Wiper / Data List.
(e) Check the Data List for proper functioning of the windshield wiper switch assembly.

Wiper:





NG -- INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY
(a) Inspect the windshield wiper switch assembly Removal.
HINT: Reconnect the connector.

NG -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
OK -- Continue to next step.
3. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY
(a) Disconnect the connector from the auto wiper ECU.





(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. INSPECT WINDSHIELD WIPER RELAY ASSEMBLY





(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
5. INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
(a) Inspect the front washer motor.
NG -- REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR