Mechanic Wiki: How to Match a Foton Gratour Keyless Remote with LAUNCH X431

Learn how to program a Foton Gratour key fob using a LAUNCH X431 scanner. Step-by-step guide, troubleshooting tips, and FAQs for key matching and remote learning.

Last Updated: June 20, 2026

Quick Answer: Can You Match a Foton Gratour Keyless Remote with a LAUNCH X431?

Yes, you can program a replacement key fob for a Foton Gratour using a LAUNCH X431 diagnostic scanner, as long as your device has the correct software package and your vehicle is supported. The process involves accessing the Immobilizer (IMMO) or Key Programming menu, selecting the exact Foton Gratour model (e.g., Gratour S or DL), and following the scanner’s step-by-step instructions. This guide walks you through the entire procedure, including the manual remote learning step required on some models, plus common troubleshooting tips.

Understanding the Process: Immobilizer and Remote Learning

Before diving into the steps, it helps to know what’s happening under the hood. The Foton Gratour uses an immobilizer system that requires the transponder chip inside your key to match the vehicle’s ECU (Engine Control Unit). Without that match, the engine won’t start, even if the remote buttons lock and unlock the doors.

The keyless entry function (lock/unlock) is separate from the immobilizer. On some Gratour models, the scanner programs both the chip and the remote simultaneously. On others, you’ll need to perform an additional manual learning sequence for the remote buttons.

That’s where the LAUNCH X431 shines. Unlike a generic OBD2 code reader, the X431 offers bidirectional controls and manufacturer-level access specifically for IMMO and remote functions. It can read PIN codes, program transponder chips, and guide you through the remote learning process.

Prerequisites: Before You Start

Gathering everything beforehand saves you from mid-procedure headaches.

Valid LAUNCH X431 Device: Make sure your unit (X431 PAD V, X431 PROS, X431 V+, or similar) has active software subscriptions and the Foton diagnostic software add-on installed. Without it, the scanner won’t recognize the vehicle.
Key Fob(s): Have all original and new key fobs ready. The system often requires you to program every key you want to keep using in a single session. If you start without one key, that key will no longer work.
Vehicle Power: Low battery voltage can cause communication failures, especially during IMMO operations. If your car battery is weak, connect a battery charger or jump pack before starting.
VIN Access: Note the 17-character VIN. You’ll find it on the dashboard near the windshield or on the driver’s door jamb. Accurate model selection depends on it.

Step-by-Step: Matching a Foton Gratour Keyless Remote

Step 1: Connect and Initialize the LAUNCH X431

Plug the X431 diagnostic cable into the vehicle’s OBD2 port. On the Gratour, that port is usually under the dashboard on the driver’s side.
Turn the ignition ON (engine off). Do not start the engine.
Power on the X431 tablet. Wait for it to boot fully.
From the main menu, select Foton > Gratour. Depending on your vehicle year, you may see sub-models like Gratour S or Gratour DL. Pick the one that matches your VIN.
The scanner will attempt to read the VIN automatically. Confirm the displayed VIN matches your vehicle. If it doesn’t, you can manually enter it.

Step 2: Enter Key Programming Mode

Once the scanner has identified the vehicle, go to System Functions (sometimes labeled Diagnosis).
Select IMMO / Immobilizer.
Look for an option called Remote Key Programming, Key Learnt, or Add Key. The exact label varies by software version.
If you don’t see those, try Special Functions > Antitheft > Key Matching.
The X431 may request a security access code (PIN). For older Gratour models, the default is often 8888. For later models, common codes include 0000, 1234, or the last four digits of the VIN. If none work, you may need to use the scanner’s Scan PIN function (if available) to retrieve it from the ECU.

Step 3: Start the Learning Procedure

Follow the prompts on the scanner carefully. A typical sequence looks like this:

Insert the original working key into the ignition. Turn it to the ON position (instrument cluster lights up). Wait 5 seconds, then turn it OFF.
Remove the original key and insert the new key you want to program. Turn it to ON.
Wait for the immobilizer warning lamp (usually a car icon with a key) on the dashboard to turn off or stop flashing. This usually takes a few seconds.
Turn the ignition OFF and remove the new key.
If you have additional keys to program, repeat steps 1–4 with each one.
The scanner will display “Learning Successful” or “Key Added” when finished.

Step 4: Program the Remote Keyless Entry (If Separate)

On some Gratour models, the remote buttons do not automatically pair during the IMMO step. In that case, you need this manual procedure:

Close all doors.
Insert the key into the ignition switch, then remove it. Repeat this six times within 10 seconds. On the sixth removal, the hazard lights should flash twice.
Turn the ignition ON (engine off).
Within 5 seconds, press and hold the LOCK button on the remote for about 2 seconds, then press and hold the UNLOCK button for 2 seconds.
The car will lock and unlock automatically to confirm the remote is paired.
Repeat the button sequence for any additional remotes.

Step 5: Test and Exit

Test each key: lock, unlock, trunk release. Then start the engine with each key to confirm the immobilizer chip is recognized.
If everything works, turn off the ignition and disconnect the LAUNCH X431.
If not, move to the troubleshooting section below.

Troubleshooting: Common Issues During Programming

Problem: Scanner Cannot Communicate with IMMO System

Possible causes and fixes:

Wrong model selected: Double-check your Gratour’s year and sub-model. Selecting “Gratour S” when you own a “Gratour DL” can block communication.
Outdated software: Connect the X431 to Wi-Fi, run a system update, and check for Foton software patches.
Blown fuse: A blown IMMO or BCM (Body Control Module) fuse can prevent the scanner from talking to the immobilizer. Check the fuse box under the hood and inside the cabin.

Problem: “Security Access Denied” or Wrong PIN

What to try:

Test common PINs: 8888, 0000, 1234, 1111, or the last four digits of the VIN.
Use the X431’s Scan PIN function (if available) to read the code directly from the ECU.
Select Force Learn or Emergency Start in the IMMO menu (not all versions have this).
If all else fails, contact a Foton dealer. Some newer Gratour models require a dealer-calculated PIN that cannot be read by aftermarket scanners.

Problem: Remote Buttons Don’t Work After Key Programming

Steps to fix:

Repeat the manual remote learning procedure described in Step 4. Sometimes the first attempt doesn’t register.
Replace the remote’s battery with a fresh CR2032 coin cell. A weak battery can prevent the signal from reaching the vehicle.
If still no luck, the BCM (Body Control Module) may need a reset. Disconnect the car battery for 10 minutes, reconnect, and start over from Step 1.

Problem: New Key Starts Car but Old Key Stops Working

Why this happens and how to fix it:

You likely programmed only the new key, which caused the system to erase the old key’s memory.
Solution: Return to Step 1 and program all keys together in one session. Include every key you want to keep using.

Frequently Asked Questions (FAQ)

1. How many keys can I program for the Foton Gratour?

Most Foton Gratour models support up to four remote keys stored in the system. You must program all desired keys in a single session. If you try to add a fifth key later, it will replace the oldest key in memory.

2. Can I program a key without the original?

Yes, if you have the correct PIN code. Without the original key, the immobilizer system won’t have a valid chip to learn from, but the X431 can sometimes force-learn a new key if the PIN is entered correctly. Some versions of the scanner can also read the PIN from the ECU directly. If you don’t have the PIN and can’t retrieve it, you’ll need dealer assistance.

3. My LAUNCH X431 says “No Foton Software.” What now?

You need to purchase and install the Foton diagnostic software add-on. Open your device’s application store (usually called “X431 App” or “Diag Center”), search for “Foton,” and follow the purchase/installation instructions. You may also need to ensure your device’s subscription is active.

4. Does the key fob need to be an original OEM part?

Not necessarily, but aftermarket fobs must be compatible with the Gratour’s radio frequency (typically 433 MHz) and transponder chip type (usually a 46 or 4D chip). Buy from reputable sellers who specify compatibility with Foton Gratour. Incompatible aftermarket fobs are a common cause of programming failure.

5. The car locks but the engine won’t start after programming.

This indicates the immobilizer chip inside the key was not successfully learned. The remote function works because that’s a separate system, but the ECU doesn’t recognize the chip. Repeat the IMMO learning process, making sure the chip is positioned close to the ignition coil. On some Gratour models, holding the key in the ON position longer (up to 10 seconds) helps.

6. Can I erase all keys and start over?

Yes. The LAUNCH X431 has an Erase All Keys function inside the IMMO menu. Use this only if you are prepared to reprogram every key you own. After erasing, the vehicle will not start with any key until you program at least one back.

7. What if the X431 freezes mid-programming?

Do not turn off the ignition or disconnect the cable. Wait at least two minutes. The system will eventually timeout. After that, turn the ignition OFF, restart the X431, and begin the procedure again from Step 1. Avoid interrupting a programming session unless absolutely necessary.

Pro Tips for Success

Use a Stable Power Supply: Voltage drops during IMMO operations are a leading cause of failure. Attach a battery charger or jump pack to maintain voltage above 12.5V throughout the process.
Record Your PIN: Once you successfully retrieve or enter the security code, write it down and store it somewhere safe. You’ll need it for future key programming.
Check for Technical Bulletins: Some Gratour model years have specific TSBs (Technical Service Bulletins) that alter the programming sequence. A quick online search or check with a Foton dealer can save you time.
Backup Original Calibration: Before making any changes, use the X431’s Backup function (usually in the IMMO menu) to save the current BCM/IMMU data. If something goes wrong, you can restore the original settings.

About the Author: Erwin Salarda is an Automotive Service Equipment Technician based in the Philippines, specializing in computerized automotive diagnostic equipment such as OBD scanners and wheel alignment systems. Since 2012, he has been actively providing technical support, equipment installation, troubleshooting, after-sales service, and hands-on training for automotive service equipment used by workshops and automotive professionals.

He has received specialized training from international suppliers and manufacturers, including Launch X431 in Shenzhen, China, Lawrence Engineering Company in Guangzhou, China, and 3Excel Wheel Alignment Company in Shenzhen, China. Through these trainings, he developed advanced expertise in automotive diagnostics, calibration, wheel alignment systems, and computerized automotive service technologies.

Erwin Salarda provides professional after-sales support and technical training for automotive diagnostic and wheel alignment equipment, helping clients maximize the performance and proper use of their tools and systems. His experience covers equipment setup, software updates, calibration procedures, troubleshooting, and operational guidance for automotive workshops and service centers.

With more than a decade of experience in the automotive equipment industry, Erwin Salarda continues to support automotive businesses by delivering reliable technical expertise and practical training solutions.

For inquiries and equipment purchases, please visit https://carlifterph.com/