Clearance Warning ECU Communication Stop Mode [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR OPEN IN CAN BUS LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH LINE)

Disconnect the cable from the negative (-) auxiliary battery terminal.

Disconnect the H61 clearance warning ECU assembly connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H61-17 (R1) - H61-18 (R2)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Clearance Warning ECU Assembly)

NG → REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
H61-27 (E) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Clearance Warning ECU Assembly)

Connect the cable to the negative (-) auxiliary battery terminal.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
H61-12 (IG) - Body ground	Power switch on (IG)	11 to 14 V

TEXT IN ILLUSTRATION

*a	Front view of wire harness connector (to Clearance Warning ECU Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK → See step 3

REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to REMOVAL [08/2013 - ]