WIPER AND WASHER SYSTEM Wiper ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the windshield wiper relay assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY (IG POWER SOURCE CIRCUIT)

   
   

   1. Disconnect the F79 windshield wiper relay assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition F79-2 (IG) - Body ground Ignition switch ON 11 to 14 V Ignition switch off Below 1 V F79-16 (WIG) - Body ground Ignition switch ON 11 to 14 V Ignition switch off Below 1 V

      Result
      Proceed to OK NG

   
   

   NG

   CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

   OK

2. CHECK WINDSHIELD WIPER RELAY ASSEMBLY (GROUND CIRCUIT)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition F79-12 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

   
   

   1. Disconnect the 4A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition F79-2 (IG) - 4A-10 Always Below 1 Ω F79-16 (WIG) - 4A-29 Always Below 1 Ω F79-2 (IG) or 4A-10 - Body ground Always 10 kΩ or higher F79-16 (WIG) or 4A-29 - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR