Front Wiper Motor Circuit

DESCRIPTION

The main body ECU LH (cowl side J/B LH) controls the front wiper motor.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT WIPER MOTOR)

1. Connect the intelligent tester to the DLC3.

2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.

3. Select the items below using ACTIVE TEST and then check that the front wiper motor operates.

   Body No. 3 (Main Body ECU LH): 

   Item	Test Details	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	Go to step 2

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY

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

2. Check the LO operation (LHD).

   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.

3. Check the HI operation (LHD).

   1. 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.

4. Check the LO operation (RHD).

   1. 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.

5. Check the HI operation (RHD).

   1. 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.

NG	REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY

OK

3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR - MAIN BODY ECU LH (COWL SIDE J/B LH))

1. Disconnect the A19 windshield wiper motor assembly connector.

2. Disconnect the A30 main body ECU LH (cowl side J/B LH) connector.

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

   Standard resistance:

   LHD:

   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

   Standard resistance:

   RHD:

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

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE