Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AS3L
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Gasoline Model): All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch; 2019 - 2022 MY Avalon [04/2018 -        ]

All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly and driver door key cylinder lock or unlock switch signals from the front door lock with motor assembly LH. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The power door lock control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power door lock control system after confirming that the communication systems are functioning properly.

    Click here 2019 - 2022 MY Avalon [04/2018 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here 2019 - 2020 MY Avalon [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 - 2022 MY Avalon [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

CHECK FOR DTC (LIN COMMUNICATION SYSTEM)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Clear DTCs.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B1206 is not output.

NG

GO TO LIN COMMUNICATION SYSTEM (DTC B1206)

OK

2.

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Replace the multiplex network master switch assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; WINDOW / GLASS: POWER WINDOW MASTER SWITCH: REMOVAL

NEXT

3.

CHECK DOOR LOCK OPERATION

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

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Gasoline Model): OPERATION CHECK

OK:

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

OK

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL