How to Add Toyota BA/4A Smart Key with Launch X431 IMMO Plus and X-PROG5?

This comprehensive guide walks you through the procedure for programming a smart key on a 2023 Toyota Venza using Launch X431 IMMO Plus/IMMO Elite/IMMO Pro with X-PROG5 key programmer.

Essential Pre-requisites & Rules:

Network & Harness Requirements:

Reading the immobilizer data requires a dedicated BA/4A wiring harness attached per the system’s schematic diagram. This operation extracts immobilizer credentials directly from the smart box to perform password-free key programming. A stable internet connection is mandatory.

Key Capacity & Timing:

The system supports matching up to 6 keys in total. Be sure to complete each step promptly within the designated time frame.

Step-by-Step Programming Guide:

Step1: Generating Remote with X-PROG 5

Establish a connection between X431 IMMO tablet and Launch X-PROG 5 unit using the blue USB cable included in the X-PROG 5 kit.
Power on the tablet and navigate to: Key Programming➔ Vehicle Remote ➔ ASIA ➔ Toyota ➔ All remotes ➔ Generate.
Place the original Toyota key into the key recognition slot of Launch G5 programmer.

Wait until the remote generation process finishes successfully.

Step2: Extracting Immobilizer Data via BA/4A Harness

Enter the IMMOfunction from the main tablet menu.
Go to: TOYOTA➔ Toyota Anti-theft diagnostic software (e.g., V10.70) ➔ Immobilizer/Keys Programming ➔ System mode ➔ Entry & start (Smart Key Programming) ➔ Type 11 ➔ Read immobilizer data ➔ Wiring Diagram.

Reference the wiring diagram to hook up the BA/4A cable correctly.

Plug the main OBD cable into the vehicle’s diagnostic port, and interface the anti-theft box adapter cable with its corresponding vehicle connector.

Tap Read immobilizer data (BA/4A wiring harness). Ensure your Launch IMMO tablet maintains a strong Wi-Fi connection.
Enter a file name to save the .binimmobilizer backup. Confirm successful data extraction.