Wednesday, 17 September 2025

Using the KEYDIY Toyota 8A All-Lost Key Adapter

This guide provides step-by-step instructions for using the KEYDIY Toyota 8A All Keys Lost Adapter. Each step includes references to the corresponding diagrams for clarity.


Adapter Components Overview

The adapter kit includes the following labeled components:

① Relay

② Large clip – clamps to the positive terminal of the battery

③ Small clip – clamps to the positive terminal harness of the car battery

④ Key inspection line plug (white)

⑤ OBD connector – plugs into the vehicle’s OBD port

⑥ OBD connector – plugs into the KEYDIY device (e.g., KD-X4)

⑦ Fuse plug – inserts into the position of the unplugged fuse

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Step-by-Step Instructions


Step 1: Battery Connection

Disconnect the positive terminal of the car battery.

Use the large clip (No. 2) to clamp the positive terminal of the battery.

Use the small clip (No. 3) to clamp the positive terminal harness of the car battery.

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Step 2: Locate and Unplug the White Connector

Remove the steering wheel cover panel.

Locate the white connector and unplug it.

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Step 3: Connect the Key Inspection Line

Insert the white key inspection line plug (No. 4) into the slot of the unplugged white connector.

using-the-keydiy-toyota-8a-all-lost-key-adapter-4

Step 4: Fuse Replacement

Move to the driver’s footwell and locate the fuse box.

Identify the correct fuse location based on your vehicle model (see the figure below for fuse locations).

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Remove the specified fuse and plug in the fuse plug (No. 7) into the same slot.

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Step 5: OBD Connections

Plug the OBD connector (No. 5) into the vehicle’s OBD port.

Connect the OBD connector (No. 6) to your KEYDIY device (e.g., KD-X4).

using-the-keydiy-toyota-8a-all-lost-key-adapter-7

Completion

Once all connections are made, proceed with the all-keys-lost programming process using your KEYDIY device as per its instructions.


Note:

Always follow safety precautions when working with car batteries and electrical systems.

Ensure all connections are secure before initiating the programming process.

For further support, visit www.obd2shop.co.uk.


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Using the KEYDIY Toyota 8A All-Lost Key Adapter

This guide provides step-by-step instructions for using the KEYDIY Toyota 8A All Keys Lost Adapter . Each step includes references to the co...