Front Wiper Motor Circuit: Procedure

1. Remove the windshield wiper motor assembly. Refer to REMOVAL [06/2012 - ] .
   Fig 1: Checking Windshield Wiper Motor Assembly Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the LO operation.
   1. Connect a battery positive (+) lead to terminal 5 (+1) and a negative (-) lead to terminal 4 (E), and check that the motor operates at low speed.

      OK

      Motor operates at low speed (LO).

3. Check the HI operation.
   1. Connect a battery positive (+) lead to terminal 3 (+2) and a negative (-) lead to terminal 4 (E), and check that the motor operates at high speed.

      OK

      Motor operates at high speed (HI).

      TEXT IN ILLUSTRATION
      
      

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

NG → See step   5 

OK: Go to next step 

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A25-2 (B) - Body ground	Engine switch on (IG)	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A25-4 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the H51 windshield wiper relay assembly connector and H25 windshield wiper switch assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A25-1 (+S) - H51-1 (+SM)	Always	Below 1 Ω
   A25-1 (+S) - Body ground	Always	10 kΩ or higher
   A25-3 (+2) - H51-11 (+2)	Always	Below 1 Ω
   A25-3 (+2) - H25-4 (+2)	Always	Below 1 Ω
   A25-3 (+2) - Body ground	Always	10 kΩ or higher
   A25-5 (+1) - H25-3 (+1)	Always	Below 1 Ω
   A25-5 (+1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4