Wiper ECU Power Source Circuit [08/2014 - ]: Procedure

1. Disconnect the H75 windshield wiper relay assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H75-12 (IG) - Body ground	Power switch on (IG)	11 to 14 V
   H75-23 (WIG) - Body ground	Power switch on (IG)	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H75-26 (E) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Windshield Wiper Relay Assembly)

Result:  OK

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR