Clearance Warning ECU Power Source Circuit [02/2019 - 10/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BATTERY AND BODY GROUND)

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)

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
H4-28 (E) - Body ground	Always	Below 1 Ω

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:

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [02/2019 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR