OBDSTAR G3 Program 2024 BYD Seagull All Keys Lost via OBD

 Here is a quick walkthrough on adding a new key to a 2024 BYD Seagull (all keys are lost) via OBD using OBDSTAR X300 Classic G3.

Required Tools:

• X300 Classic G3 key programmer (Key Master G3)
• Main Diagnostic Cable
• New Unlearned Key

Step-by-Step Guide:

Step 1: System Selection

Navigate to the IMMO menu

Select BYD option-> BYD software (e.g., V40.73)-> Manual Select System-> PROXIMITY-> Type 19

Step 2: Read Current Key Data

Check the existing key count first.

Place the active key in the coil/sensing zone and tap OK.

The screen displays that only 1 key is currently registered.

Step 3: Program the New Key

Select Program Keys (the system capacity is 4 keys max).

Swap the active key with the new key in the sensing area, then press OK.

Step 4: Verify Operation

Once the screen indicates successful programming, exit the menu and test the new key in the ignition.

The engine starts right up, confirming successful learning for 2024 BYD Seagull with OBDSTAR G3.

Lonsdor K518 PRO: How to Add BCP Key to 2025 BMW X3 UWB

 The 2025 BMW X3 can be programmed with the Lonsdor K518 PRO using the ADP40 Adapter Kit and an OEM smart key. This X3 has UWB, so an OEM key is required for programming.

Tools Used

K518 PRO Key Programmer

ADP40 Adapter Kit — PB40-BM03

OEM Smart Key

Original Key

The ADP40 Adapter Kit supports encrypted data reading for BMW G/U Chassis BDC2/BDC3/BCP keys, BMW smart keys with LCD screens, VW/Audi 5C/5D smart keys, and Porsche smart keys.

Connect the ADP-40 Adapter

1. Connect the wiring harness to the ADP40 Adapter, then connect the PB40-BM03 dedicated cardboard for the BMW chassis.
2. Open the OEM key. Press the button to release the metal block, push off the back cover, and open the side with a fingernail or screwdriver.
3. Remove the battery and mechanical key. Release the front-cover buckles with a blade or screwdriver and remove the key.

Read the Working Key

1. Attach the key to the PB40-BM03 and align it with the positioning angle.
2. Go to Immo & Remote >> BMW >> Select from type >> U Chassis >> BCP key copy (encrypted). This is a non-LCD key, so select BCP key copy (encrypted).
3. Make sure Wi-Fi is connected. Select Read working key, connect the ADP-40 with the original key chip, and click OK.
4. Enter a file name to save the data. Confirm the VIN is correct, then click OK.

Generate the Dealer Key

1. Select Use genuine/OEM key to copy.
2. Remove the ADP-40 Adapter and replace the original key chip with the OEM key.
3. Reconnect the ADP-40 Adapter and click OK. The K518PRO generates and locks the dealer key successfully.

Verify the Key

Start the vehicle with the new key and confirm the key functions work normally. Programming is successful.

BMW B48 B58 DME Read and Write with Yanhua ACDP

 Yanhua Mini ACDP and ACDP2 support bench-mode operations for BMW DMEs, including locked post-June 2020 models and earlier versions. ACDP BMW B48 B58 Bench Interface Board and related license are required. This guide details the required licenses, supported engine models, and app operation paths.

Post-2020.06 (Locked) ECU

• Using: B48/B58 Board + A520 License (Submit serial number for activation)
• Functions: ISN Read, Full Data Backup/Write, EEPROM Read/Write, FLASH Read/Write.

Pre-2020.06 (ISN Read) ECU

• Using: B48/B58 Board + Module 3 License (SK337 — — For ACDP; SK337-B — — for ACDP-2)
• Functions: ISN Read.

Pre-2020.06 (Clone) ECU

• Using: B48/B58 Board + BMW ECU Clone License
• Functions: Full ECU Cloning

Supported Models List

• Post-June 2020 Models:
• MD1CP032 TC299, MD1CS001 TC298, MG1CS024 TC298, MG1CS049 TC298, MG1CS201 TC298
• Pre-June 2020 Models:
• Fxx: B37 (MD1CS001), B38 (MD1CS001), B48 (MG1CS003/201), B58 (MG1CS003)
• Gxx: B46 (MG1CS201), B47 (MD1CP002/CS001), B48 (MG1CS003/201), B57 (MD1CP002), B58 (MG1CS003/201), N63 (MG1CS201), N74 (MG1CS003/201)
• Rxx: B37 (MD1CS001), B48 (MG1CS201)

Connection diagram

App Navigation

Read ISN:

BMW -> DME ISN -> BENCH Mode Read/Write DMEISN -> BOSCH DME -> Select Engine Model

Perform the supported features: Identify Info, Read ISN or Read EEPROM.

Read/Write ECU Data:

BMW -> ECU RD/WR -> BOSCH DME -> Select Engine Model

Perform the supported features: Identify Info, Full Backup/Write, Read/Write EEPROM, Read/Write FLASH.

CGDI BD006 Manual: Battery, Cranking, Charging & Voltage Tests

 The CGDI BD006 Car Battery Tester uses conductance testing technology to quickly measure a starting battery’s cold-cranking capability and state of health (SOH). This manual covers four main functions: Battery Test, Cranking Test, Charging Test, and Voltage Acquisition.

Battery Test

The CGDI BD006 Battery Test function is for 12V lead-acid batteries.

• Before Testing

Before testing in the vehicle:

1. Turn off all accessory loads.
2. Remove the key from the ignition.
3. Close the doors.
4. If the vehicle was running, turn on the headlights to discharge the battery’s surface charge.
5. Let the battery rest for at least 1 minute before testing.

• Test Procedure

1. Select BATTERY and press [Enter].
2. Select the battery type and press [Enter]. Check the battery label for the type.
3. Select the battery standard and press [Enter]. Check the battery label for the standard.
4. Enter the CCA with the ▲/▼ keys, then press [Enter] to start the test.

• Short-press ▲/▼ to change the value by 5.
• Press and hold ▲/▼ to change the value continuously.

The test result appears on the display.

• Battery Test Results

ResultMeaningGood BatteryBattery condition is good.Good ChargingBattery condition is good. Charge the battery.ReplaceReplace the battery.Retest After ChargingCharge the battery and test again.

• Battery Test Terminology

TermDescriptionHealth (SOH)Battery condition compared with a new battery, considering cell aging.Charge (SOC)Remaining battery charge compared with its maximum available charge.Internal R (Internal Resistance)Resistance to current flow in the cells and battery. It is affected by electronic and ionic resistance.RatedThe CCA entered in the previous step, based on the CCA shown on the battery label. The difference between rated and actual CCA affects the test result.

Cranking Test

The Cranking Test supports 12V and 24V lead-acid batteries.

• Before Testing

Turn off the engine and all accessory loads before testing.

• Test Procedure

1. Select CRANK and press [Enter].
2. Follow the on-screen prompt and crank the engine.
3. The result appears on the screen, including cranking time and cranking voltage.

• Cranking Test Results

Cranking Time: Time required to start the engine.

Cranking Voltage: Battery voltage while the engine is starting.

The result is typically:

Cranking Low • Normal • Good

Charging Test

The Charging Test supports 12V and 24V lead-acid batteries.

• Before Testing

Start the engine before performing the charging test.

• Test Procedure

1. Select CHARGE from the home screen and press [Enter].
2. Confirm that the engine is running and press [Enter].
3. The tester performs a ripple test. The result appears as a graph. After 10 seconds, it moves to the next step.
4. Turn off loads such as the headlights and blower motor. Press [Enter].
5. Increase the engine speed to 2500 RPM. Press [Enter].
6. Release the throttle. Press [Enter].
7. The charging test result appears on the display.

• Charging Test Results

The result is typically:

No Output

Charging Low

Charging Normal

Charging High

Voltage Acquisition

The Voltage Acquisition function displays the vehicle’s voltage information.

• Test Procedure

From the main menu, press V to start the function.

The display shows:

Current voltage

Maximum and minimum voltage

Voltage trend curve

Select Exit to return to the main menu.

KEYDIY KD-X6 Read VW 5C Key Data with GODIAG Solder-free Adapter

 KEYDIY KD-X6 can read original Volkswagen 5C key data using GODIAG VAG 5C 5D Solder-Free Clip Adapter Kit. This guide outlines the exact steps to extract the key data and prepare for key learning.

Required Tools:

• KEYDIY KD-X6 key programmer
• GODIAG BDC3 Key Adapter and VW 5C Clip (default in GODIAG BMW BDC3 14-in-1 Adapter Kit)
• Original VW 5C key PCB

Step-by-Step Instructions:

1. Hardware Connection

Plug GODIAG BDC3 Key Adapter into the main port of KD-X6 programmer.

2. Menu Navigation

Open the tablet menu and go to: IMMO programming -> VW -> 5C/5D Immobilizer system -> Start execution.

3. Function Selection

Select Read the original car key and generate a dealer key.

Then choose Disassembling key data to generate dealers/Generating dealers via service account.

4. Clip Connection

Check the wiring diagram displayed on KEYDIY KD-X6 screen. Attach the 5C clip adapter to the corresponding points on the original key PCB.

5. Data Reading & Saving

Execute the Read Chip Data. Once the 5C key data reading finishes, save the generated service code to your device.

6. Dealer Key Generation & Key Learning

Use the saved service code to make a dealer key and complete the key learning procedure.

Note: If the vehicle features an SFD gateway system, unlock SFD security protection prior to performing key learning.

Lonsdor K518 Pro: How to Add 4A-B6 Key to 2026 Toyota Avalon

 The Lonsdor K518 PRO Key Programmer has been tested successfully for adding a smart key to the 2026 Toyota Avalon. The procedure uses the LT32 4A-B6 Key.

Tools

Lonsdor K518 PRO

Lonsdor LT32 Smart Key

Toyota FP30 Cable

Original Key

Identify the Key Type & Generate LT32

1. Select Identify and Copy. Put the original key into the K518PRO slot and select Edit EEPROM. Check line 40H. B6 confirms the 4A-B6 chip type.
2. Go back to key generation: Generate Smart Key → Toyota → Avalon → 2025-/ID4A_B6.
3. Put the LT32 Smart Key into the K518 PRO slot and select Generate. After successful generation, select Cancel and return.

Back Up PEPS Immo Data

1. Go to Immo & Remote → Toyota → Select from vehicle → China → Avalon HV → 2025–2026 → Smart key(4A_B6) → Backup Immo data.
2. Connect the FP30 Cable to the PEPS case. Click OK. Confirm the network connection, switch the ignition on, and click OK.
3. Enter a file name and save the data. The K518PRO will confirm that the immo data backup is successful.

Add the Smart Key

1. Select Add smart key. Confirm the network connection and vehicle power. Switch the ignition on and click OK.
2. Select Load the read D-FLASH data of PEPS to acquire 12-bit PIN code. Choose the first backup file saved earlier.
3. Check the key count and click OK. Use the original key to tap the ignition. When the buzzer beeps once, remove it. Then use the LT32 to tap the ignition.
4. After the operation is complete, click OK and turn the ignition off.

Final Check

Start the vehicle with both the LT32 and original key. Both keys start the vehicle normally, and the lock/unlock remote functions work.