WIPER AND WASHER SYSTEM (w/ Rain Sensor) > Wiper and Washer Switch Circuit

for Preparation Click here


DESCRIPTION

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

WIRING DIAGRAM


E177914E01


INSPECTION PROCEDURE

1.INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY


    E169424E05

  1. Remove the windshield wiper switch assembly (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Front Wiper Switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D22-3 (+1) - D22-1 (+S)
    		OFF
    		Below 1 Ω
    D22-3 (+1) - D22-2 (+B)
    		MIST
    LO
    D22-2 (+B) - D22-4 (+2)
    		HI
    D22-9 (AUTO) - D22-10 (E)
    		AUTO
    D22-3 (+1) - D22-1 (+S)
    Front Washer Switch:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D21-2 (EW) - D21-3 (WF)
    		ON
    		Below 1 Ω
    OFF
    		10 kΩ or higher
    Adjusting Ring*1:
    Tester Connection
    		Condition
    		Specified Condition
    D22-7 (VR1) - D22-8 (VR2)
    		 Adjusting ring changed from (+) side to (-) side
    		0 to 2.7 kΩ

    HINT:
    *1: The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting ring.

Text in Illustration 
*1
Component without harness connected
(Windshield Wiper Switch Assembly)


NG
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (WIPER SWITCH - WIPER RELAY AND BODY GROUND)


  1. Disconnect the D21 and D22 windshield wiper switch assembly connectors.


    E124995E12


    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Windshield Wiper Switch Assembly)
    		*2
    		Front view of wire harness connector
    (to Windshield Wiper Relay Assembly)

  1. Disconnect the D41 windshield wiper relay assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D22-2 (+B) - D41-12 (IG)
    		Always
    		Below 1 Ω
    D22-2 (+B) - Body ground
    		Always
    		10 kΩ or higher
    D22-3 (+1) - D41-1 (+2S)
    		Always
    		Below 1 Ω
    D22-3 (+1) - Body ground
    		Always
    		10 kΩ or higher
    D22-4 (+2) - D41-3 (+2)
    		Always
    		Below 1 Ω
    D22-4 (+2) - Body ground
    		Always
    		10 kΩ or higher
    D22-1 (+S) - D41-11 (+SSW)
    		Always
    		Below 1 Ω
    D22-1 (+S) - Body ground
    		Always
    		10 kΩ or higher
    D22-9 (AUTO) - D41-17 (C1)
    		Always
    		Below 1 Ω
    D22-9 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    D22-10 (E) - D41-16 (CO)
    		Always
    		Below 1 Ω
    D22-10 (E) - Body ground
    		Always
    		10 kΩ or higher
    D22-7 (VR1) - D41-7 (VR1)
    		Always
    		Below 1 Ω
    D22-7 (VR1) - Body ground
    		Always
    		10 kΩ or higher
    D22-8 (VR2) - D41-6 (VR2)
    		Always
    		Below 1 Ω
    D22-8 (VR2) - Body ground
    		Always
    		10 kΩ or higher
    D21-3 (WF) - D41-4 (W)
    		Always
    		Below 1 Ω
    D21-3 (WF) - Body ground
    		Always
    		10 kΩ or higher
    D21-2 (EW) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)