Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.

SERVICE MODE

NOTICE:

• Before servicing, enter service mode to restrain telematics communication functions and prevent the Toyota Entune Remote Connect from being operated while servicing.
• Service mode can be entered by using the Techstream or operating the radio and display receiver assembly.

(a) Service mode

HINT:

To cancel service mode, turn the engine switch off and on (IG) to display the service mode screen and cancel service mode.

(1) Service mode (Using the Techstream)

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Telematics / Trouble Codes.

(2) Service mode (When not using the Techstream)

1. Start diagnostic mode.

   w/o Navigation System: Click here

   w/ Navigation System: Click here

PRECAUTION FOR TELEMATICS SYSTEM

(a) If replacing any of the following parts, refer to Initialization.

Click here

NOTICE:

If registration is not performed after replacing any of the following parts, the remote door lock and unlock and remote engine start and stop will not be available.

(1) Certification ECU (smart key ECU assembly)

(2) DCM (telematics transceiver)

(3) Main body ECU (multiplex network body ECU)

(b) If an additional device such as a theft deterrent or OBD monitoring device is connected to the DLC3, some functions may not operate correctly.