WIPER AND WASHER SYSTEM Wiper Switch (HI Speed) Circuit

DESCRIPTION

The front controller receives the HI position signal of the wiper switch to operate the wiper motor at HI speed. Even if the ECU malfunctions, its circuit structure enables it to operate the wiper in HI operation mode.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK FRONT CONTROLLER (2S SIGNAL)

   
   
   1. 

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition A51-14 (2S) - Body ground Wiper switch not in HI position 11 to 14 V A51-14 (2S) - Body ground Wiper switch in HI position Below 1 V

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT WINDSHIELD WIPER SWITCH (COMBINATION SWITCH ECU)

   
   
   1. 

      Disconnect or remove the switch (see pageClick here)

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition 3 (2S) - 8 (E) Wiper switch in HI position Below 1 Ω 3 (2S) - 8 (E) Wiper switch not in HI position 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - FRONT CONTROLLER AND BODY GROUND)

   
   
   1. 

      Disconnect the L25 switch connector.

   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 L25-3 (2S) - A51-14 (2S) Always Below 1 Ω L25-8 (E) - Body ground A51-14 (2S) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
4. Click here

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLEClick here

5. Click here

   REPLACE WINDSHIELD WIPER SWITCHClick here

6. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

   REPLACE FRONT CONTROLLER