Front Wiper Motor Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Body No. 3 / Active Test.
5. Check the operation.
   BODY NO. 3 (MAIN BODY ECU LH)
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Wiper Motor Hi	Front wiper motor HI operation	ON/OFF	-
   Wiper Motor Lo	Front wiper motor LO operation	ON/OFF	-

   OK

   Front wiper motor operates.

NG → See step   2 

OK → See step   4 

1. Remove the windshield wiper motor assembly. Refer to REMOVAL [08/2012 - ] .
2. Check the LO operation.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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).

      TEXT IN ILLUSTRATION
      
      

      *1	Component without harness connected (Windshield Wiper Motor Assembly)

3. 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 → See step   5 

OK: Go to next step 

1. Disconnect the A19 windshield wiper motor assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the A30 and LK main body ECU LH (cowl side junction block LH) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   LK-9 (WIG) - A19-2 (B)	Always	Below 1 Ω
   A30-1 (S/S) - A19-1 (+1)	Always	Below 1 Ω
   A30-2 (+2) - A19-4 (+2)	Always	Below 1 Ω
   A30-3 (S/M) - A19-3 (+S)	Always	Below 1 Ω
   A19-3 (+S) - Body ground	Always	10 kΩ or higher
   A19-2 (B) - Body ground	Always	10 kΩ or higher
   A19-4 (+2) - Body ground	Always	10 kΩ or higher
   A19-5 (E) - Body ground	Always	Below 1 Ω
   A19-1 (+1) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Windshield Wiper Motor Assembly)
   *2	Front view of wire harness connector (to Main Body ECU LH)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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