For enthusiasts using OBD2 diagnostic tools like the BAFX Products OBD2 Bluetooth adapter, managing power consumption is a key concern. Leaving your OBD2 adapter constantly powered can lead to unnecessary battery drain. This guide provides a straightforward modification to convert your Bafx Products Obd2 Diagnostic Interface to switched 12V power, ensuring it only draws power when your vehicle is on or in accessory mode. This modification is particularly useful for devices like the BAFX Products PIC18F2480 Bluetooth OBD2 adapter, enhancing its usability and preventing battery drain issues.
This modification is simple and can be completed in about 15 minutes. Here’s how to do it:
Step-by-Step Modification Guide
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Access the Internals: Begin by removing the blue label on your BAFX Products OBD2 adapter to reveal the four screws underneath. Unscrew these to open the casing.
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Disconnect the Connector: Carefully separate the two halves of the unit and unplug the white connector from the printed circuit board (PCB).
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Remove OBDII Connector Shell: You can now lift the OBDII connector entirely out of the unit’s shell, providing easy access to the pins.
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Wire Repositioning for Switched Power: The crucial step is to relocate the wire connected to pin 16, which is for constant 12V power, to pin 8. Pin 8 is designated for switched ACC 12V power. On the connector, pin 16 is located at the top left, and pin 8 is at the bottom left, making this a simple adjustment.
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Reassemble Connector and Unit: Place the OBDII connector back into the shell and reconnect the white connector to the PCB.
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Close the Casing: Reassemble the two halves of the shell and secure them with the four screws. Be cautious not to bend the LEDs during reassembly.
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Final Touches: You can reapply the blue label or leave it off, depending on your preference.
Now, your BAFX Products OBD2 diagnostic interface will only power on when your vehicle is powered on or in ACC mode. This ensures it functions as intended for vehicle diagnostics without the risk of draining your car battery when not in use. This modification enhances the functionality and longevity of your BAFX OBD2 adapter, making it an even more valuable tool for vehicle maintenance and diagnostics.
