Visual Mute Signal Circuit between Radio Receiver and Multi-display [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.

INSPECT MULTI-DISPLAY ASSEMBLY

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

Standard Voltage

Tester Connection	Condition	Specified Condition
G22-11 (VMTI) - Body ground	Power switch on (ACC) Screen display changing	3.5 V or higher → Below 1 V → 3.5 V or higher

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*a	Component with harness connected (Multi-display Assembly)

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:

See step 2

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

Disconnect the G22 multi-display assembly connector.
Disconnect the G4 radio receiver assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G4-1 (VMTF) - G22-11 (VMTI)	Always	Below 1 Ω
G4-1 (VMTF) or G22-11 (VMTI) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 3

REPLACE MULTI-DISPLAY ASSEMBLY

Replace the multi-display assembly with a new or known good one.
Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

Check that the screen display is normal.

Screen display is normal.

Result

Proceed to
OK
NG

Result:

END

Result:

REPLACE RADIO RECEIVER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 09/2022]