Rain Sensor Circuit: Procedure

1. Disconnect the R7 rain sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   R7-1 (SIG) - R7-3 (ES)	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   2 

OK → See step   4 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   R5-17 (IG2) - R5-16 (GND2)	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Overhead Junction Block)

NG → See step   3 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK) 

1. Disconnect the R5 overhead junction block connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   R5-31 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   R5-19 (IG) - R5-31 (GND)	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Overhead Junction Block)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5