Clearance Warning ECU Power Source Circuit [10/2023 - ]: Procedure

1. Disconnect the clearance warning ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	for TMMC Made
   *B	for TMC Made
   *a	Front view of wire harness connector (to Clearance Warning ECU Assembly)

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

   Standard Resistance

   FOR TMMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   G25-28 (E) - Body ground	Always	Below 1 Ω

   FOR TMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   H4-31 (E) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   FOR TMMC MADE:
   
   

   Tester Connection	Switch Condition	Specified Condition
   G25-1 (IG) - Body ground	Power switch on (IG)	11 to 14 V
   G25-1 (IG) - Body ground	Power switch off	Below 1 V

   FOR TMC MADE:
   
   

   Tester Connection	Switch Condition	Specified Condition
   H4-1 (IG) - Body ground	Power switch on (IG)	11 to 14 V
   H4-1 (IG) - Body ground	Power switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR