Autel IM608 Program 2021-2024 Toyota Sienna All Keys Lost

 This guide demonstrates how to perform an all-keys-lost procedure on a 2021-2024 Toyota Sienna with the new security system 8A-BA type. Using the Autel IM608 and 30-pin cable, we’ll bypass the factory PIN code requirement and program a new key—including fixing the common remote not working issue after programming.

 

Here we use Xhorse XD8ABAGL Toyota 30 pin cable.

NOTE: Toyota all keys lost function was removed in the US region. But it still works for other regions.

Step-by-Step Procedure

1. Access the Smart Key Box

• Location: Behind the glove box (passenger side).

• Steps:

  1. Remove the glove box trim (three 10mm bolts + clips).

  2. Unbolt and lower the glove box assembly.

  3. Locate the Smart Key Control Unit (black box with wiring harness).

2. Connect the Autel IM608

• Bypass OBD & Use Direct Wiring:

  • Disconnect the factory harness from the Smart Key box.

  • Plug in the Xhorse Toyota 30 pin cable (compatible with Autel):

    • The J3 end → Smart Key box (CAN Low, CAN High, 12V, Ground).

    • Other end → Autel IM608 interface.

3. Backup Immobilizer Data

1. In Autel IM608:

   • Select Toyota > Sienna > Smart Key Control Unit.

   • Choose “Keyless System (CAN)”

   • Choose “Backup EEPROM Data.”

2. Save the backup file (critical for bypassing the PIN code later).

4. Generate a Simulator Key

1. Connect the APB112 Emulator to the Autel.

2. Select “Generate Analog Key” and load the backup file.

3. The emulator will create an emulator key to start the programming process.

5. Program a New Key

1. Reconnect the factory harness to the Smart Key box.

2. In Autel:

   • Go to “Add Key” and use the saved EEPROM file.

   • Ignition ON with the emulator key.

   • Present the new physical key to the ignition button.

3. Issue: The car may start, but the remote won’t work yet.

6. Fix the Remote (Steering Lock Handshake)

• Why It Happens: New Siennas require a security handshake between the steering lock module and ECU.

• Solution:

  1. In Autel:

     • Go to Diagnostics > Toyota > Automatic selection- Decode VIN > Radar Cruise.

     • Navigate to:
       Hot Functions > Immobilizer & Keys > Smart Key > “ECU Communication ID Registration.”

  2. Perform the steering lock/ECU handshake.

  3. Turn ignition OFF/ON and test the remote.

If add key only, follow the procedure here

http://blog.obdii365.com/2023/09/17/autel-im508-adds-2023-toyota-sienna-key-via-obdstar-30-pin-cable/