Mechanic : How to Program a 2024+ Toyota Raize Key with Launch X431

Step-by-step guide to programming a 2024+ Toyota Raize key using the Launch X431 scanner. Covers remote and immobilizer programming, security codes, and troubleshooting.

Quick Answer: What You Need to Know

Programming a 2024+ Toyota Raize requires a high-end bidirectional scan tool like the Launch X431. The process involves two distinct steps: Remote Key Registration and Immobilizer (Transponder) Programming. You must first add the new key to the immobilizer system via the "Special Functions" menu, then synchronize the remote control unit. If you are adding a spare key, you typically only need the "Add Key" function. If all keys are lost, you will need the "All Keys Lost" procedure (which erases the engine ECU memory) and the corresponding Security Code/PIN Code (often obtained from a dealer or third-party service like AutoAuth or KC100). A stable internet connection (for the X431 software download) and a battery maintainer for the car are mandatory.

Introduction

The 2024+ Toyota Raize – built on a Daihatsu platform shared with models like the Terios and Rocky – uses a modern CAN-based immobilizer system typically manufactured by Denso or NEC. Unlike older Toyotas where a simple manual procedure could register a transponder, the Raize requires full bidirectional communication with the engine ECU and body control module (BCM). That’s where the Launch X431 series comes in.

The Launch X431 PRO, PRO3, PAD VII, and other variants are the go-to tools for professional automotive locksmiths and technicians because they offer:

Full bi-directional control – you can not only read codes but also command the ECU.
Dedicated Toyota software – covers immobilizer, remote key registration, and smart key matching.
Access to security access/data – including reading immobilizer serial numbers and, in some cases, the PIN code.

But a word of caution: A wrong step – especially during an "All Keys Lost" procedure – can lock the ECU permanently, requiring a dealer-level recovery. So follow each step carefully and always use a battery maintainer.

Prerequisites & Preparation

Before diving into the programming steps, ensure you have everything lined up:

Required Hardware & Software

Launch X431 – any model from the PRO to the PAD VII (ensure the annual diagnostic subscription is active).
Toyota software package – version V48 or later (update your X431 before starting).
Reliable internet connection – the X431 downloads modules and may need to verify licenses.
Vehicle OBD-II port – located under the driver’s side dashboard.

Vehicle State

Battery voltage must be above 12.5V. Connect a battery maintainer or charger to prevent voltage drops during ECU writes.
Engine OFF – ignition can be in ACC or ON as instructed.
Doors closed – the BCM uses door status as a safety interlock.
Hood closed – some Raize models have a hood switch that must be closed to enter immobilizer programming mode.

Keys Needed

If adding a spare key (keys still present): You need at least one valid master key (the one that can start the car). The new key must have a compatible transponder chip (ID47 or ID4C depending on the year) and a remote shell with the correct frequency (433MHz or 315MHz).
If all keys lost: You need two blank new keys with transponders. Aftermarket keys (like IKey or Apex) generally work fine for the transponder, but the remote function often requires an OEM-compatible shell.

Security Code (PIN)

The PIN is the most critical piece. Without it, you cannot program the immobilizer. Here are your options:

Option A: Dealer – Provide your VIN and proof of ownership. Most secure, but can be expensive.
Option B: AutoAuth or KC100 – Third-party services that calculate the PIN from the VIN and immobilizer serial number. Fast and affordable.
Option C: Read from ECU – Some X431 models with advanced security access adapters (e.g., Launch X431 IMMO module) can extract the PIN directly from the engine ECU or BCM. This is the most convenient if your tool supports it.

Important Note on "All Keys Lost"

If you choose "All Keys Lost," the X431 will erase all existing key data from the engine ECU. That means you must have the correct PIN, or you will need to replace the ECU entirely. Always verify the PIN before proceeding.

Step 1: Vehicle Connection & System Scan

Connect the Launch X431 to the OBD-II port. Turn the ignition to ON (ACC position is usually enough, but some functions need full ignition).
Launch the Toyota diagnostic software on the X431. If the software isn't installed, the tool will prompt you to download it.
Select Auto Scan – the tool will identify the vehicle model (Raize 2024+) and list all ECUs: Engine, BCM, Smart Key Module (if equipped), SRS, etc.
Wait for the scan to complete. You should see green checkmarks next to most modules.

Troubleshooting tip: If the tool fails to connect, check the USB or Bluetooth pairing. On some X431 units, the wireless connection may disconnect under heavy ECU traffic – using a USB cable is more reliable. Also ensure your X431's firmware is up-to-date.

Step 2: Locate the Immobilizer Special Function

From the main menu of the Toyota software, navigate to Special Functions → Immobilizer.
Do not select "Reset ECU" unless you have the security code and are performing an all-keys-lost procedure. Resetting the ECU without the PIN will lock the module.
Select Key Programming (sometimes labeled "Key Registration").

Pro tip: On some software versions, you may need to enter a 5-digit or 7-digit PIN. Toyota typically uses 5-digit PINs for 2024+ vehicles. If the tool asks for a 7-digit code, pad the PIN with leading zeros (e.g., 12345 becomes 0012345).

Step 3: Perform the Key Programming (Method Selection)

Scenario A – Adding a New Key (Keys Present)

Select Add Key.
The software will ask for the Security Code (PIN). Enter it carefully.
The X431 will instruct you to insert the new key into the ignition slot and turn to ON. (If the Raize has push-button start, hold the key near the start button or insert it into the emergency slot as per the tool's instruction.)
The tool will write the key data to the engine ECU. This process takes 20–60 seconds.
You’ll see "Programming Successful" on the screen. Keep the ignition ON for the next step.

Scenario B – All Keys Lost

Select All Keys Lost.
The tool will issue a warning: "This will erase all key memory. Are you sure?" – confirm only if you have the PIN and at least two new key blanks.
Enter the Security Code. If the PIN is wrong, the ECU may lock you out for several minutes.
Insert the first new key (this will be your master key) and turn to ON. The X431 will write a "master" index to it.
Remove the first key, insert the second new key, and turn to ON. The ECU will register it as an additional key.
The tool will confirm when complete. Note: On some Raize models, both keys must be inserted and turned within a 30-second window.

Step 4: Remote Control Registration (Door Lock Sync)

This is a separate step that programs the remote (unlock/lock buttons) via the BCM.

Keep the ignition ON. Navigate back to Special Functions → Body/BCM → Remote Control Registration (or "Keyless Entry Registration").
The tool will instruct you to press Lock+Unlock on the new key fob within a few seconds.
The X431 will then force the BCM to accept the remote ID. You may hear a confirmation beep or the doors locking/unlocking.
Repeat for each additional fob.

Check: Press the lock/unlock buttons. The doors should respond. If not, go back and repeat the registration.

Step 5: Final Test & Verification

Disconnect the X431 from the OBD port.
Test the key in the ignition: The engine must start.
Test the remote: Lock, unlock, trunk release (if equipped).
If the Raize has Smart Key (Passive Entry) , test by walking up to the car with the key in your pocket – the doors should unlock. Press the start button – the engine should start.
Pro tip: Perform a battery disconnect/reconnect cycle (remove negative terminal for 30 seconds) to force the ECU to reinitialize with the new key data. This often resolves any intermittent start issues.

Common Issues & Troubleshooting

Error	Likely Cause	Solution
"Cannot Enter Programming Mode"	Low battery voltage; hood or door open	Connect battery maintainer; close all doors and hood.
"Invalid Security Code"	Incorrect PIN entered	Double-check the PIN with your source (dealer, AutoAuth, etc.). Some models use a 5-digit code with a leading zero.
"Key is Already Registered"	The key fob was previously programmed to another vehicle	The transponder can be erased only with specialized equipment (e.g., Tango, X431 IMMO). You may need a new blank key.
Remote works but car doesn’t start	Only the BCM remote ID is programmed, not the immobilizer transponder	Go back to Step 3 (Immo) and redo the key programming.
Engine starts but remote doesn’t work	BCM did not accept the remote ID	Repeat Step 4 (Remote Registration). Ensure you press the buttons within the tool’s prompt window.
Tool loses connection during programming	Unstable Bluetooth/Wi-Fi; USB disconnection	Switch to a wired OBD connection (most X431 units support USB). Ensure the 12V battery is stable.

Frequently Asked Questions (FAQ)

Q: Can I program a 2024 Toyota Raize key without the Launch X431?

A: No. The 2024+ Raize uses a modern CAN-based immobilizer. Simple OBD programmers or manual procedures (like turning the key on/off) won't work. You need a high-end diagnostic tool such as the Launch X431, Autel MaxiIM, or Toyota Techstream with a security access subscription.

Q: Do I need the original master key to add a spare?

A: Usually, yes. The "Add Key" function requires at least one programmed master key in the ignition slot to authorize the ECU to accept a new key. However, some X431 versions can bypass this if you have the PIN – but it's safer to have the original key.

Q: What if I don’t have the Security Code (PIN)?

A: You absolutely need it for any immobilizer programming. Options: Contact a Toyota dealer with proof of ownership; use an online calculator like AutoAuth or KC100 (costs ~$30–50); or read the code directly from the ECU using the X431's security access adapter (if you have one).

Q: Will an aftermarket key work, or does it need to be OEM?

A: Aftermarket keys (e.g., IKey, Apex) are fine for the transponder chip. For the remote (door lock) function, make sure the shell is compatible with the Raize’s frequency – usually 433MHz for most markets. OEM shells are recommended for reliability.

Q: How many keys can I program?

A: Toyota generally allows up to 5–7 keys per vehicle. If you exceed the limit, you must "All Keys Lost" to reset the list.

Q: Can I do this without a battery maintainer?

A: Not recommended. A voltage drop during the writing process can corrupt the ECU memory, leaving the car immobilized. Always connect a quality battery charger that maintains at least 13.5V.

Programming a 2024 Toyota Raize is a straightforward process when you have the right tool and the PIN. Follow these steps methodically, and you'll have the job done in under 30 minutes. If you run into a specific issue, leave a comment below or reach out to Launch X431 support – the software is regularly updated with new fixes.