WIPER AND WASHER SYSTEM 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 (WINDSHIELD WIPER RELAY ASSEMBLY - RAIN SENSOR)

   
   

   1. Disconnect the E95 windshield wiper relay assembly connector.

   2. Disconnect the O7 rain sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E95-14 (MPX1) - O7-1 (MPX) Always Below 1 Ω E95-14 (MPX1) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - IG CIRCUIT AND BODY GROUND)

   
   

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

      Standard Voltage
      Tester Connection Condition Specified Condition O7-4 (SIG) - Body ground Power switch on (IG) 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition O7-2 (ES) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT RAIN SENSOR

   
   
   1. 

      *a	Component with harness connected (Rain Sensor)

      Reconnect the O7 rain sensor connector.

   2. Connect an oscilloscope to the rain sensor connector.

   3. Check for pulses.

      OK
      Tester Connection Condition Specified Condition O7-1 (MPX) - O7-2 (ES) Power switch on (IG) Pulse generation

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

   REPLACE RAIN SENSOR Click here