Autel IM508 Failed to Read Toyota CHR 2021-2023 IMMO Data Solution

Problem:

It also happens on 2021-2023 Toyota CHR with 8A proximity key. It’s all keys lost situation, tried AKL smart box reset using Autel IM508S but failed. The smart box has 27 PIN connector so the 30 PIN cable will not fit.

Tried with gbox3 on bench, get message informing that this software version number is not supported.

“The current smart main ECU software version number is not supported.
Version number: 8999AF4120010101”

Solution:

IM608 and IM508 don’t able to read latest tmlf15-3 smart box. Software version does not support.

Use other programmers. Autel does not support this version on smart key module.

If you use Autel for this, need to go straight to key learning , to get Incode/outcode pin code request procedure (buy 12-digit PIN).

Use Lonsdor K518 Pro , AVDI or Smart Pro.

Lonsdor K518 Pro: Try to back up immo data via OBD. If fails to back up immo data via OBD, back up data via ADP15 adapter. Generator emergency key than use immo data to program new key.

Smart Pro: use a Smart Pro with the key emulator adapter.

Autel IM608 Program 2023 Toyota Tundra All Keys Lost with FP30 Cable

This guide walks you through the process based on a real-world all-keys-lost scenario on a 2022 or 2023 Toyota Tundra (applicable to models up to 2025).  With the right tools and procedure, you can bypass the PIN code requirement and program new smart keys.

 

Tools used:

Autel MaxiIM IM508 or IM608

Lonsdor FP30 bypass cable (30 pin gateway connector)

APB112 emulator

New key to be programmed

 

Procedure:

Step 1: Access the Smart Box

Start by removing the plastic trim panel near the smart box. Once exposed, locate the second box next to the silver unit. You will see a top connector on that box — this needs to be disconnected.

Step 2: Connect the Bypass Cable

After disconnecting the original connector, plug in your bypass cable. This allows you to communicate directly with the smart box without requiring the original key or PIN code.

Step 3: Back Up EPROM Data

Using your Autel IM608 tool, perform a full backup of the EEPROM data. This is a critical step. Save the file securely.

Step 4: Generate an Analog Key (APB112 Emulator)

With the backup complete, generate an analog key using your software. Load the saved backup file, then connect your APB112 emulator (adapter). The emulator mimics a valid key and allows the vehicle to recognize a new key during programming.

Step 5: Reconnect the Original Connector

Once the emulator is connected and recognized, unplug the bypass cable and reconnect the original connector back into the smart box. This restores normal communication while keeping the emulator active.

Step 6: Verify Ignition Activation

Turn on the ignition using the emulator. The system will ask whether the ignition turned on. Confirm “yes.” This step ensures that the vehicle’s electronics are responding correctly.

Step 7: Add the New Smart Key

Navigate to the “Add Smart Key” function in your programming tool. The vehicle’s VIN will appear automatically. Confirm it, then hold the new key near the start button or as instructed by your tool. You should hear two beeps, and the tool will display “Succeeded.”

Step 8: Perform Steering Lock Synchronization

Even after adding the key, the steering lock may not sync automatically. Go to the steering lock sync function in your tool. Turn on the ignition when prompted. The tool will read the PIN code from the backup and complete the synchronization.

Step 9: Test Key Functions

At this point, test the remote functions. The key should lock and unlock the doors.

Step 10: Final Vehicle Start Check

Before calling the job complete, ensure the vehicle can start. In the example, the truck initially wouldn’t start because the transmission was left in Drive. Always make sure the shifter is in Park or Neutral before attempting to start. Once corrected, the vehicle started normally.

How to Add Renault Twingo 2014 Key with Autel IM508?

What I did today was: choose Smart Forfour 453 engine. Make eeprom backup, calculate password from backup, and add key!
Successfully added key to Renault Twingo 2014 with Autel IM508.
ID4A PCF7961MTT (Aftermarket key).

 

Program Benz W220 K-line All Keys Lost with Autel IM508

It’s a Mercedes Benz W220 older model with K-line. All keys have lost. w220 (k) kline you cannot read it by IR or by OBD unless you have a working key.

Some of them are different and you can make key only by removing MCU. It has a 2 big square processor chips.

The older w220’s are one of the hardest EIS’s to program a key too. Most tools will not read the info to calculate the password and will require the removal of the EIS and the removal of the MCU to be able to get the info needed to calculate the password.

For this old of EIS you have to take out EIS and desolder the MCU and read dump directly to get password. This is the only good way to do it.

Autel IM508/IM608 with XP400 Pro can also do this.

Remove the EIS, remove the MCU on the EIS, solder the MCU chip to the Autel’s APB128 adapter. Read MCU info to calculate the password and program key.

Photos attached:

 

Autel IM608 PSA Keyless Entry Not Working Solution

A common issue encountered when coding 8A keys for PSA Smart vehicles: the keyless system (Keyless Entry) not activating after programming using AUTEL MaxiIM IM508/IM608 or other programmers.
The root cause often lies in differences within the key’s EEPROM data.

In this guide, we’ll walk through how to identify and solve this problem.

Guide:

Access the Programmer Menu
Start by entering the programmer menu on your Autel device.

Navigate to Transponder Section
Go to the transponder menu and select “Transponder Reading.” Use the automatic detection feature to read the key. Ensure the key is placed inside the device.

Read the Key Data
The device will read the key and display its ID, key type etc. Then, enter the “Edit” section to read the EEPROM data stored inside the key.

Analyze the EEPROM
Check data line 160. Focus on the first two bytes (first two numbers).

If the value is 01, the key is Type 2.

For the key to function properly, the original key must read 01. This ensures healthy operation of the keyless system.

Real-World Example: Opel Combo 2023

Let’s consider an example using an Opel key (for a 2023 Opel Combo). When reading this key, the data starts with C6. If you were to try programming another remote with this configuration, the remote would not work and would essentially become locked or non-responsive.

Why? Because the PSA system expects specific EEPROM values. A mismatch – such as seeing a different header instead of the required 01 – prevents the keyless entry from engaging.

The Solution

To solve this issue, you must ensure that the key’s EEPROM data matches the required Type 2 standard (starting with 01). If the key shows a different value (like C6), it will need to be reprogrammed or replaced with a compatible unit. Always verify the first two bytes of the EEPROM before finalizing the coding process.

 

Conclusion

Keyless entry failures after coding PSA Smart keys are often due to hidden EEPROM differences. By using an Autel programmer to inspect the first two bytes of the EEPROM, you can quickly determine if the key is compatible. Remember: 01 = Type 2 = functional keyless entry. Anything else, like a C6 header, will lead to failure.