Front Wiper Motor Circuit: Procedure

1. Select the Active Test, use the Techstream to generate a control command, and then check the front wiper motor.
   NOTE:

   When a Body No. 5 (front light ECU) related vehicle switch is ON, Active Test items related to the vehicle switch are prohibited (double operation prohibition). Check that the vehicle switches are OFF before performing Active Test.

   FRONT LIGHT ECU:
   
   

   Tester Display	Test Part	Control Range
   Wiper Motor HI	Wiper motor HI operation	ON / OFF
   Wiper Motor LO	Wiper motor LO operation	ON / OFF

   OK

   Front wiper motor operates.

NG → See step   2 

OK → See step   4 

• SST: 09843-18040 

1. Remove the front wiper motor. Refer to REMOVAL [09/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Check the LO operation.
   1. 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.

      OK

      Motor operates at low speed

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

      OK

      Motor operates at high speed

4. Check the automatic stop operation.
   1. Connect the positive (+) battery lead to terminal 1 (+1) of the connector and the negative (-) battery lead to terminal 5 (E). With the motor operating at low speed (LO), disconnect terminal 1 (+1) to stop the wiper motor operation at any position other than the automatic stop position.
   2. Using SST, connect terminals 3 (+S) and 1 (+1). Then connect the positive (+) battery lead to terminal 2 (B) of the connector to restart the motor operation at low speed (LO).
   3. Check that the motor stops automatically at the automatic stop position.

      OK

      Automatically stops.

NG → See step   5 

OK: Go to next step 

1. Disconnect the A32 motor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the A51 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A32-2 (B) - A51-2 (WIG)	Always	Below 1 Ω
   A32-1 (+1) - A51-8 (S/S)	Always	Below 1 Ω
   A32-4 (+2) - A51-9 (+2)	Always	Below 1 Ω
   A32-3 (+S) - A51-1 (S/M)	Always	Below 1 Ω
   A32-5 (E) - Body ground	Always	10 kΩ or higher
   A32-3 (+S) - Body ground	Always	10 kΩ or higher
   A32-2 (B) - Body ground	Always	10 kΩ or higher
   A32-4 (+2) - Body ground	Always	10 kΩ or higher
   A32-1 (+1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE FRONT LIGHT ECU (FRONT CONTROLLER)