WIPER AND WASHER SYSTEM(w/ Rain Sensor) Rain Sensor Circuit

DESCRIPTION

The windshield wiper relay assembly receives a signal from the rain sensor to control the auto wiper system.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - IG1 NO. 1 RELAY AND BODY GROUND)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Rain Sensor)

      Disconnect the L5 rain sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition L5-4 (SIG) - Body ground Ignition switch ON 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition L5-2 (ES) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - WINDSHIELD WIPER RELAY ASSEMBLY)

   
   

   1. Disconnect the L5 rain sensor connector.

   2. Disconnect the F72 windshield wiper relay assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition L5-1 (MPX) - F72-14 (MPX1) Always Below 1 Ω L5-1 (MPX) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK RAIN SENSOR

   
   
   1. 

      Text in Illustration

      *a	Component with harness connected (Rain Sensor)

      Reconnect the rain sensor connector.

   2. Connect an oscilloscope to the rain sensor connector.

   3. Check for pulses.

      OK
      Tester Connection Switch Condition Specified Condition L5-1 (MPX) - L5-2 (ES) Ignition switch ON Pulse generation

   
   

   OK

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

   NG

   REPLACE RAIN SENSOR Click here