All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch [06/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Main Body / Clear DTCs.
Clear the DTCs.
Body Electrical > Main Body > Clear DTCs

Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

DTC B1206 is not output.

Result

Proceed to
OK
NG

Result:

GO TO LIN COMMUNICATION SYSTEM (DTC B1206). Refer to DTC B1206: P/W Master Switch Communication Stop; DTC B1273: Sliding Roof ECU Communication Stop; DTC B2321: D-Door Motor ECU Communication Stop; DTC B2322: P-Door Motor ECU Communication Stop; DTC B2323: RR-Door Motor ECU Communication Stop; DTC B2324: RL-Door Motor ECU Communication Stop [06/2018 - ]

Result:

See step 2

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

Replace the multiplex network master switch assembly.

Refer to REMOVAL [06/2018 - ]

Result

Proceed to
NEXT

Result:

See step 3

CHECK DOOR LOCK OPERATION

Check that all doors can be locked and unlocked by the multiplex network master switch assembly.

Refer to OPERATION CHECK [06/2018 - ]

All doors can be locked and unlocked by the multiplex network master switch assembly.

Result

Proceed to
OK
NG

Result:

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

Result:

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]