For automotive enthusiasts and DIY mechanics, having a reliable Can-bus Car Diagnostic Scanner is indispensable. These tools allow you to tap into your vehicle’s complex network, reading error codes, monitoring performance data, and much more. Among the popular options, the BAFX Products PIC18F2480 Bluetooth OBD2 adapter stands out for its positive reviews and broad compatibility. Many users find it provides a robust connection and seamless integration with diagnostic apps like Turbo3’s.
One common desire among users is to modify these scanners for switched Accessory (ACC) power. Out of the box, many OBD2 adapters draw power continuously, even when the ignition is off, potentially leading to battery drain over extended periods. Switching to ACC power ensures the device only operates when the car is running or in accessory mode, conserving battery life and adding an extra layer of convenience.
Fortunately, modifying the BAFX OBD2 adapter for switched power is a straightforward process that most users can complete in about 15 minutes. This guide will walk you through the steps to perform this modification safely and effectively, enhancing the utility and longevity of your CAN-bus car diagnostic scanner.
Step-by-Step Guide to Modify Your CAN-Bus Scanner for Switched Power
Before starting, ensure you have a small Phillips head screwdriver and a basic understanding of automotive electrical systems. Always work in a well-lit area and take precautions to avoid static discharge when handling electronic components.
1. Accessing the Internals:
The BAFX OBD2 adapter is secured by four screws hidden beneath a blue adhesive label. Begin by carefully peeling off this label to reveal the screws. Using your Phillips head screwdriver, remove all four screws and set them aside in a safe place.
2. Separating the Unit:
Gently separate the two halves of the adapter’s casing. Inside, you’ll see the circuit board and the OBDII connector. Carefully unplug the white connector that links the OBDII port to the main printed circuit board (PCB). This disconnection allows for easier access to the wiring.
3. OBDII Connector Removal:
With the white connector unplugged, you can now lift the OBDII connector assembly completely out of the plastic housing. This provides clear access to the pins and wiring on the connector itself, which is crucial for the next step.
4. Wire Repositioning for Switched 12V Power:
This is the core of the modification. Locate pin 16 and pin 8 on the OBDII connector. Pin 16 is typically wired for constant 12V power, while pin 8 is often designated for switched ACC 12V power in many vehicles. Carefully move the wire currently connected to pin 16 and insert it into the pin 8 slot. On the BAFX adapter, pin 16 is usually located on the top left, and pin 8 is on the bottom left, making this a simple and direct wire transfer.
5. Reassembly:
Place the OBDII connector assembly back into the adapter housing. Reconnect the white connector to the PC board, ensuring it is firmly seated. Carefully align the two halves of the adapter casing and reassemble them, securing them with the four screws you removed earlier. Be mindful of the internal LEDs during reassembly to avoid bending or damaging them.
6. Final Touches:
You can choose to reapply the blue label or leave it off. The modification is now complete.
Testing and Verification
After modification, your CAN-bus car diagnostic scanner should now only power on when your vehicle’s ignition is turned to the “On” or “ACC” position. Test the adapter with your preferred diagnostic app to ensure it functions correctly and establishes a connection with your vehicle’s CAN-bus system. You should observe the same performance as before, but with the added benefit of switched power operation.
Conclusion: Enhanced Functionality for Your Diagnostic Tool
By performing this simple modification, you’ve enhanced your CAN-bus car diagnostic scanner, making it more energy-efficient and convenient to use. This switched power modification ensures that your adapter only draws power when needed, protecting your vehicle’s battery and providing peace of mind. Enjoy the improved functionality of your modified BAFX OBD2 adapter and continue to explore the capabilities of your vehicle’s CAN-bus system for advanced diagnostics and performance monitoring.
