Data Signal Circuit between Radio Receiver and Stereo Jack Adapter [06/2018 - 09/2022]: Procedure

WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)

Disconnect the G112 radio receiver assembly connector.
Disconnect the G103 No. 1 stereo jack adapter assembly connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Radio Receiver Assembly)
*b	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

Standard Resistance

Tester Connection	Condition	Specified Condition
G112-2 (US1-) - G103-2 (UDO-)	Always	Below 1 Ω
G112-3 (US1+) - G103-3 (UDO+)	Always	Below 1 Ω
G112-5 (USG1) - G103-5 (UJSS)	Always	Below 1 Ω
G112-2 (US1-) or G103-2 (UDO-) - Body ground	Always	10 kΩ or higher
G112-3 (US1+) or G103-3 (UDO+) - Body ground	Always	10 kΩ or higher
G112-5 (USG1) or G103-5 (UJSS) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [06/2018 - 10/2019] , or refer to PROBLEM SYMPTOMS TABLE [10/2019 - 08/2020] , or refer to PROBLEM SYMPTOMS TABLE [08/2020 - 08/2021] , or refer to PROBLEM SYMPTOMS TABLE [08/2021 - 09/2022]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR