WIPER AND WASHER SYSTEM > Front Wiper Motor Circuit

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DESCRIPTION

The cowl side junction block ECU LH controls the wiper motor.

WIRING DIAGRAM


E110111E01


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester's main switch ON.

  1. Select the item below in the Active Test and then check that the front wiper motor operates.

    Cowl side junction block ECU LH: 
    Item
    		Test Details
    		Diagnostic Note
    WIPER MOT (HI)
    		Front wiper motor HI operation ON / OFF
    		-
    WIPER MOT (LO)
    		Front wiper motor LO operation ON / OFF
    		-

    OK:
    Front wiper motor operates.



NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

2.INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY


    E109857E01

  1. Remove the windshield wiper motor (Click here).

  1. Check the LO operation.

    1. LHD:
      Connect the positive (+) battery lead to terminal 5 (+1) of the connector, and the negative (-) battery lead to terminal 4 (E), and check that the motor operates at low speed.
      Connect the positive (+) battery lead to terminal 3 (+2) of the connector, and the negative (-) battery lead to terminal 1 (S), and check that the motor operates at high speed.

    2. RHD:
      Connect the positive (+) battery lead to terminal 1 (+1) of the connector, and the negative (-) battery lead to terminal 5(E), and check that the motor operates at low speed.
      Connect the positive (+) battery lead to terminal 4 (+2) of the connector, and the negative (-) battery lead to terminal 3 (S), and check that the motor operates at high speed.



NG
REPLACE WIPER MOTOR ASSEMBLY
OK


3.CHECK WIRE HARNESS (WINDSHIELD WIPER MOTOR ASSEMBLY - COWL SIDE JUNCTION BLOCK LH)


    E106803E03

  1. Disconnect the A20 wiper motor connector.

  1. Disconnect the A32 ECU LH connector.

  1. Measure the resistance of the wire harness side connectors.

    HINT:
    1. *1: LHD
    2. *2: RHD

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    PK-9 (WIG) - A20-2 (B)
    		Always
    		Below 1 Ω
    A32-1 (S/S) - A20-1*1 (+1)
    		Always
    		Below 1 Ω
    A32-1 (S/S) - A20-5*2 (+1)
    A32-2 (+2) - A20-4*1 (+2)
    		Always
    		Below 1 Ω
    A32-2 (+2) - A20-3*2 (+2)
    A32-3 (S/M) - A20-3*1 (S)
    		Always
    		Below 1 Ω
    A32-3 (S/M) - A20-1*2 (S)
    A20-3*1 (S) - Body ground
    		Always
    		10 kΩ or higher
    A20-1*2 (S) - Body ground
    A20-2 (B) - Body ground
    		Always
    		10 kΩ or higher
    A20-4*1 (+2) - Body ground
    		Always
    		10 kΩ or higher
    A20-3*2 (+2) - Body ground
    A20-5*1 (E) - Body ground
    		Always
    		10 kΩ or higher
    A20-4*2 (E) - Body ground
    A20-1*1 (+1) - Body ground
    		Always
    		10 kΩ or higher
    A20-5*2 (+1) - Body ground



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE