WIPER AND WASHER SYSTEM > Wiper and Washer Switch Circuit

for Preparation Click here


DESCRIPTION

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

WIRING DIAGRAM


C110670E01


C110671E01


INSPECTION PROCEDURE

HINT:
Start the inspection from step 1 when using the intelligent tester, and start from step 2 when not using the intelligent tester.

1.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester main switch on.

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

    Wiper: 
    Item
    		Measurement Item/ Display (Range)
    		Normal Condition
    		Diagnostic Note
    WIPER LO SW
    		Wiper LO switch input/ON or OFF
    		ON: Front wiper switch is in LO position
    OFF: Front wiper switch is in any position other than LO
    		-
    WIPER HI SW
    		Wiper HI switch input/ ON or OFF
    		ON: Front wiper switch in HI position
    OFF: Front wiper switch is in any position other than HI
    		-
    WIPER AUTO SW
    		Wiper AUTO switch input/ ON or OFF
    		ON: Front wiper switch is in AUTO position
    OFF: Front switch is in any position other than AUTO
    		-



NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

2.INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

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

    HINT:
    Reconnect the connector.



NG
REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY
OK


3.INSPECT WINDSHIELD WIPER RELAY ASSEMBLY
I036785E01

  1. Disconnect the connector from the auto wiper ECU.



    E068142E01

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1S - ES
    		Windshield wiper switch MIST position
    		Below 1 Ω
    AUTO - Body ground
    		Windshield wiper switch AUTO position
    		Below 1 Ω
    1S - ES
    		Windshield wiper switch LO position
    		Below 1 Ω
    2S - ES
    		Windshield wiper switch HI position
    		Below 1 Ω
    VR2 - VR1
    		Rain sensor adjust switch "A" position
    		Below 1 Ω
    VR2 - VR1
    		Rain sensor adjust switch "B" position
    		405 to 493 Ω
    VR2 - VR1
    		Rain sensor adjust switch "C" position
    		1,400 to 1,700 Ω
    VR2 - VR1
    		Rain sensor adjust switch "D" position
    		2,200 to 3,200 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT WINDSHIELD WIPER RELAY ASSEMBLY


    I036784E04

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

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    FWAS - Body ground
    		Ignition switch ON
    		10 to 14 V



NG
Go to step 5
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

5.INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY

  1. Inspect the front washer motor.



NG
REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR