Front Wiper Motor Circuit

WIPER / WASHER: WIPER AND WASHER SYSTEM: Front Wiper Motor Circuit
- Front Wiper Motor Circuit

DESCRIPTION

The main body ECU LH (cowl side junction block LH) controls the front wiper motor.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Body No. 3 / Active Test.

(e) Check the operation.

Body No. 3 (Main Body ECU LH)





OK:

Front wiper motor operates.

NG -- INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

(a) Remove the windshield wiper motor assembly Components.

(b) Check the LO operation.





(1) Connect a positive (+) battery lead to terminal 1 (+1) and a negative (-) lead to terminal 5 (E), and check that the motor operates at low speed (LO).

OK:

Motor operates at low speed (LO).

(c) Check the HI operation.

(1) Connect a positive (+) battery lead to terminal 4 (+2) and a negative (-) lead to terminal 5 (E), and check that the motor operates at high speed (HI).

OK:

Motor operates at high speed (HI).

NG -- REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY Components
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - MAIN BODY ECU LH)

(a) Disconnect the A19 windshield wiper motor assembly connector.





(b) Disconnect the A30 and LK main body ECU LH (cowl side junction block LH) connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)