ELM327 Bluetooth OBD2 scanners are incredibly useful tools for car diagnostics, working seamlessly with Android devices and various car models via CAN bus. However, many users find that these scanners draw power continuously, even when the car is off, potentially leading to battery drain. This guide shows you how to perform a simple modification to enable switched power for your Elm327 Car Bluetooth Obd2 Auto Can Bus Scanner Tool Android, ensuring it only operates when your vehicle is running or in ACC mode.
Why Modify for Switched Power?
Leaving your OBD2 scanner plugged in constantly can drain your car’s battery over time. By modifying your ELM327 adapter for switched power, you ensure it only draws power when the ignition is on. This prevents unwanted battery drain and prolongs the life of your car battery, especially if you frequently leave the scanner plugged in.
Tools You’ll Need
- Small Phillips head screwdriver
Step-by-Step Guide to Modify Your ELM327 Adapter
Step 1: Accessing the Internals
Locate and remove the four screws on the underside of your ELM327 adapter. These are typically hidden beneath a label, which you’ll need to peel off.
Step 2: Disconnecting the Connector
Carefully separate the two halves of the adapter casing. Inside, you’ll see a small white connector linking the OBDII port to the circuit board. Gently unplug this connector.
Step 3: Wire Relocation (Pin 16 to Pin 8)
Identify pin 16 (constant 12V) and pin 8 (switched ACC 12V) on the OBDII connector. Carefully move the wire currently in pin 16 to pin 8. Pin 16 is usually on the top left, and pin 8 is on the bottom left, making this a straightforward swap.
Step 4: Reassembly
Reinsert the OBDII connector back into the casing and reconnect the white connector to the circuit board. Carefully reassemble the two halves of the casing, ensuring you don’t damage the internal components, especially the LEDs. Secure the casing with the four screws.
Step 5: Testing
Reconnect the modified elm327 car bluetooth obd2 auto can bus scanner tool android to your car and test. It should now only power on when your car’s ignition is turned on or in ACC mode.
Conclusion
By following these simple steps, you’ve successfully modified your ELM327 Bluetooth OBD2 adapter for switched power. This small change can prevent battery drain and provide peace of mind, allowing you to leave your scanner plugged in without worry. Enjoy the enhanced functionality of your elm327 car bluetooth obd2 auto can bus scanner tool android!
