Wiper and Washer Switch Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Wiper and Washer Switch Circuit

Wiper and Washer Switch Circuit

DESCRIPTION

This circuit provides power to operate the windshield wiper switch assembly. The manual operation signals are sent to the main body ECU LH (cowl side J/B LH).

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT:
Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. READ VALUE USING TECHSTREAM (WIPER SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the tester main switch on.
(c) Select the items below in the DATA LIST, and read the displays on the Techstream.

Combination Switch:





HINT:
Either intermittent function or auto function is displayed.

NG -- CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)




(a) Disconnect the J26 windshield wiper switch assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY (COMBINATION SWITCH ECU)