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

for Preparation Click here


DESCRIPTION

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

WIRING DIAGRAM


E144480E05


INSPECTION PROCEDURE

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


    E144465E04

  1. Disconnect the D41 windshield wiper relay assembly connector.

  1. Disconnect the H2 rain sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D41-8 (SIG) - H2-4 (SIG)
    		Always
    		Below 1 Ω
    H2-4 (SIG) - Body ground
    		Always
    		10 kΩ or higher
    D41-14 (PA1) - H2-3 (AUTO)
    		Always
    		Below 1 Ω
    H2-3 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    D41-26 (E) - H2-1 (ES)
    		Always
    		Below 1 Ω
    H2-1 (ES) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Windshield Wiper Relay Assembly)
    *2
    		Front view of wire harness connector
    (to Rain Sensor)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT WINDSHIELD WIPER RELAY ASSEMBLY


    E169150E02

  1. Reconnect the windshield wiper relay assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D41-8 (SIG) - D41-26 (E)
    		Engine Switch on (IG)
    		11 to 14 V

    Text in Illustration 
    *1
    		Component with harness connected
    (Windshield Wiper Relay Assembly)



NG
REPLACE WINDSHIELD WIPER RELAY ASSEMBLY (Click here)
OK


3.INSPECT RAIN SENSOR


    E141656E04

  1. Reconnect the rain sensor connector.

  1. Connect an oscilloscope to the automatic light control sensor connector.

  1. Check for pulses.

    OK:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H2-3 (AUTO) - H2-1 (ES)
    		Engine Switch on (IG)
    		Pulse generation

    Text in Illustration 
    *1
    		Component with harness connected
    (Rain Sensor)



NG
REPLACE RAIN SENSOR (Click here)
OK

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