WIPER AND WASHER SYSTEM - 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

Wiper And Washer System - Wiper And Washer Switch Circuit. WIPER AND WASHER. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

HINT:

Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output .

1.READ VALUE OF INTELLIGENT TESTER (WIPER SWITCH)

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG) and turn the intelligent tester main switch on.

Select the items below in the DATA LIST, and read the displays on the intelligent tester.

Combination Switch:
Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
F Washer SW	Front washer switch / ON or OFF	ON: Front washer switch ON OFF: Front washer switch OFF	-
F Wiper Mist SW	Front wiper MIST switch / ON or OFF	ON: Front wiper switch in MIST OFF: Wiper switch not in MIST	-
F Wiper Hi SW	Front wiper HI switch / ON or OFF	ON: Front wiper switch in HI OFF: Wiper switch not in HI	-
F Wiper Lo SW	Front wiper LO switch / ON or OFF	ON: Front wiper switch in LO OFF: Wiper switch not in LO	-
F Wiper Int SW	Front wiper INT switch / ON or OFF	ON: Front wiper switch in INT OFF: Wiper switch not in INT	-
IG SW Sig	Engine switch signal / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-
F Wiper Vol Pos	Front wiper volume (sensitivity) / 0 to 90 degrees	0 degrees: FR wiper volume "+" position 27 degrees: Switch is turned one notch towards the "-" side from the FR wiper volume "+" position 63 degrees: Switch is turned one notch towards the "+" side from the FR wiper volume "-" position 90 degrees: FR wiper volume "-" position	If the value is NG, replace the windshield wiper switch assembly .