For авто enthusiasts and DIY mechanics, the Bafx Products Elm327 Bluetooth Obd2 Scan Tool is an invaluable asset. Its compatibility and solid connection, especially with apps like Torque Pro or similar OBD2 applications, make it a go-to for vehicle diagnostics. However, one common concern arises from the fact that OBD2 adapters often draw постоянный power from your vehicle’s battery, even when the ignition is off. This can lead to аккумулятора drain over time, especially if your car sits for extended periods.
Luckily, there’s a straightforward modification you can perform to convert your BAFX Products ELM327 Bluetooth OBD2 scan tool to switched power. This means the adapter will only be active when your car’s ignition is turned on or in ACC mode, eliminating the risk of battery drain. This guide will walk you through the simple steps to modify your adapter in about 15 minutes.
Why Switch to Switched Power?
Before we dive into the how-to, let’s clarify why this modification is beneficial. OBD2 ports provide постоянный 12V power supply to connected devices. While convenient for some applications, leaving your ELM327 Bluetooth OBD2 scan tool plugged in постоянно means it’s continuously drawing power. Although the draw is minimal, over days or weeks, it can be enough to заметно drain your car battery, especially in older vehicles or those with weaker batteries. Switching to ACC (Accessory) or switched power ensures that your BAFX Products OBD2 scan tool only receives power when the car is running or in accessory mode, just like your radio or cigarette lighter.
Step-by-Step Modification Guide
This modification is designed for the BAFX Products PIC18F2480 Bluetooth OBD2 adapter, a popular and well-regarded model. Always exercise caution when working with electronics and your vehicle. If you are uncomfortable with any of these steps, it’s best to seek assistance from a qualified автомобильный technician.
Tools Needed:
- Small Phillips head screwdriver
Modification Steps:
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Open the Adapter Casing: Locate the four screws on the underside of your BAFX Products ELM327 Bluetooth OBD2 scan tool. These are typically hidden beneath a blue adhesive label. Carefully peel off the label to access the screws. Use your Phillips head screwdriver to remove all four screws.
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Separate the Casing: Once the screws are removed, gently separate the two halves of the adapter casing.
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Disconnect the Internal Connector: Inside, you’ll see a small white connector attaching the OBDII connector to the PC board. Carefully unplug this white connector.
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Remove the OBDII Connector: With the connector unplugged, you can now lift the OBDII connector assembly entirely out of the adapter’s plastic shell. This gives you easy access to the wiring.
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Relocate the Power Wire: Identify pin 16 and pin 8 on the OBDII connector. Pin 16 is the постоянный 12V power supply (typically a thicker wire), and pin 8 is the switched ACC 12V power. In the provided images, pin 16 is on the top left, and pin 8 is on the bottom left, making the wire move very straightforward. Carefully depin the wire from pin 16 and re-insert it into pin 8. Ensure it is securely seated in the new pin location. Note: Wire colors may vary, always double-check pin locations.
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Reassemble the Adapter: Place the OBDII connector assembly back into the shell and reconnect the white connector to the PC board. Carefully align the two halves of the casing and reassemble them using the four screws. Be mindful of the five small LEDs on the board and ensure they are not bent or damaged during reassembly.
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Reapply or Discard Label: You can choose to stick the blue label back on or leave it off. Leaving it off might be preferable if you anticipate opening the adapter again in the future.
Testing and Verification
After reassembly, your BAFX Products ELM327 Bluetooth OBD2 scan tool should now operate on switched power. To verify, plug the adapter back into your vehicle’s OBD2 port. With the ignition off, the adapter should be completely powered down (no LEDs lit). Turn your ignition to the ACC or ON position; the adapter should now power up and function as before.
Enjoy Switched Power for Your OBD2 Scan Tool
Congratulations! You’ve successfully modified your BAFX Products ELM327 Bluetooth OBD2 scan tool for switched power. This simple modification ensures that your adapter only draws power when needed, preventing unwanted battery drain and giving you peace of mind. You can now leave your adapter plugged in without worrying about it affecting your car’s battery, while still enjoying all the benefits of your Bluetooth OBD2 scan tool for vehicle diagnostics and performance monitoring.
