In the realm of automotive diagnostics, the Can-bus Car Diagnostic Scanner stands as an indispensable tool. These devices empower car owners and mechanics alike to delve into the intricate systems of modern vehicles, retrieving crucial data and fault codes via the OBD2 port. However, a common concern arises with certain scanners: their tendency to draw power continuously, even when the vehicle is switched off. This persistent drain can lead to unwanted battery depletion. Fortunately, a straightforward solution exists – modifying your can-bus car diagnostic scanner for switched power. This ensures the device is active only when the ignition is engaged, preserving your battery life and enhancing the scanner’s longevity. Let’s explore how you can implement this beneficial modification.
Many can-bus car diagnostic scanners, particularly Bluetooth OBD2 adapters, are designed for constant connection to the vehicle’s CAN bus system. While this allows for features like remote vehicle monitoring, it also means they are perpetually drawing power from your car’s battery as long as they are plugged into the OBDII port. For vehicles that are not driven daily or for users concerned about parasitic battery drain, this constant power draw can be problematic.
One popular and well-regarded can-bus car diagnostic scanner adapter, the BAFX Products PIC18F2480 Bluetooth OBD2 adapter, offers a robust and reliable connection. Its design also lends itself well to a simple modification that switches its power source from a constant 12V supply to a switched Accessory (ACC) 12V supply. This modification ensures that the scanner only receives power when the car is turned on or in ACC mode, effectively eliminating any risk of battery drain when the vehicle is off.
For those interested in performing this modification on a compatible can-bus car diagnostic scanner like the BAFX adapter, the process is surprisingly straightforward and can be completed in a matter of minutes with basic tools. Here’s a step-by-step guide based on the BAFX Products PIC18F2480 Bluetooth OBD2 adapter:
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Accessing the Internals: Begin by removing the blue adhesive label on the adapter. Beneath it, you will find four screws securing the casing. Unscrew these to open the device.
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Disconnecting the PCB Connector: Carefully separate the two halves of the adapter’s casing. Inside, you’ll see a white connector linking the OBDII connector to the Printed Circuit Board (PCB). Gently unplug this connector.
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Removing the OBDII Connector Assembly: With the connector detached, you can now lift the entire OBDII connector assembly out of the adapter’s shell. This provides easy access to the wiring.
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Repositioning the Power Wire: Identify pin 16 on the OBDII connector. This pin typically carries the constant 12V power supply. Locate pin 8, which is designated for switched ACC 12V power. Carefully move the wire currently connected to pin 16 and insert it into pin 8. On the BAFX adapter, pin 16 is on the top left, and pin 8 is on the bottom left, making this wire relocation simple.
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Reassembling the Connector: Place the OBDII connector assembly back into the adapter’s shell and reconnect the white connector to the PCB, ensuring a secure fit.
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Closing the Casing: Carefully reassemble the two halves of the adapter’s casing, aligning them properly. Replace and tighten the four screws, being mindful not to apply excessive pressure that could damage the internal components, particularly the LEDs.
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Final Touches: You can choose to reapply the blue label or leave it off, depending on your preference. The modification is now complete.
After this modification, your can-bus car diagnostic scanner will function exactly as before, but it will now only power on when your vehicle’s ignition is turned on or is in ACC mode. This ensures that the device does not draw power when the car is off, preventing potential battery drain issues. This switched power setup works seamlessly with various OBDII applications, maintaining the full functionality of your diagnostic tool while adding an extra layer of battery protection.
Implementing a switched power modification can significantly enhance the practicality and longevity of your can-bus car diagnostic scanner. This simple yet effective adjustment ensures your diagnostic tool is powered only when necessary, preventing unwanted battery drain and solidifying its reliability for all your vehicle diagnostic needs. Explore carscannertool.store for a range of high-quality can-bus car diagnostic scanners and accessories to optimize your automotive maintenance toolkit.
