Experiencing trouble connecting your BAFX Bluetooth OBD2 adapter to your 1999 Miata with your Android device? You’re not alone. Many Miata owners encounter similar issues when trying to use OBD2 readers, especially with older models. Let’s troubleshoot this problem and get you connected.
It appears you’ve already taken the initial steps correctly: plugging in the BAFX Bluetooth OBD2 reader into the port under the fuse box cover, pairing your Android device (Samsung Galaxy Player 5.0) using code ‘1234’, and using apps like Torque and Car Gauge Lite. The red light indicating power is a good sign, but the “No response from vehicle ECU” message is where things get stuck. You’ve also confirmed the adapter works on a ’98 Civic, pointing towards a Miata-specific issue.
Let’s address your questions to pinpoint the problem:
1. Protocol Specification:
While OBD-II is a standard, sometimes older cars, particularly those from the earlier years of OBD-II implementation, can be a bit finicky. While the ‘Auto’ protocol should work, it’s worth trying to manually specify the protocol within your Torque or Car Gauge Lite app settings. For a 1999 Miata (NB generation), you might want to try ISO9141-2 or KWP2000 protocols. Consult your app’s settings to see if you can manually select these protocols instead of relying on auto-detection.
2. OBD2 Port Location:
You are likely using the correct OBD2 port located under the fuse box cover to the left of the driver’s knee. It is indeed a somewhat inconvenient location if you intend to keep the adapter plugged in for extended periods. While it’s less likely there’s another hidden port for standard OBD2 access, it’s always good to double-check your Miata owner’s manual for definitive port locations. However, the location you described is the standard OBD2 port for the NB Miata. Mechanics might access it from a lower angle, but it’s generally the same port.
3. OBD2 Reader Compatibility with NBs:
It’s true that some vehicles can be more selective about OBD2 readers. While the BAFX Bluetooth OBD2 adapter is generally well-regarded and not a “rock bottom cheapest” option, compatibility issues can still arise. It’s possible your 1999 Miata might be slightly more sensitive.
Before considering returning the BAFX adapter, here are a few more steps to try:
- Ensure Ignition is ON: While you mentioned trying with the engine running, ensure at least the ignition is in the “ON” position (without starting the engine) when attempting to connect. This powers up the ECU.
- Firmware/App Updates: Check if there are updates available for your Torque or Car Gauge Lite apps. Sometimes updates improve compatibility.
- Try a Different Android Device: Although less likely, try connecting with a different Android phone or tablet if available to rule out any device-specific issues.
- Check BAFX Documentation: Consult the BAFX adapter’s documentation or website for specific troubleshooting steps or compatibility notes, although they are generally marketed as broadly compatible.
If none of these steps work, it might unfortunately point to a compatibility issue between the BAFX adapter and your specific 1999 Miata. In this case, exploring other OBD2 reader brands or models might be necessary. When looking for alternatives, consider readers specifically reported to work well with Mazda vehicles or NB Miatas in online forums and reviews. Brands like OBDLink MX+ or Veepeak are often recommended for broader compatibility.
In conclusion, while the BAFX Bluetooth OBD2 adapter is generally a good choice, incompatibility with certain car models can occur. By systematically troubleshooting protocol settings, confirming port location, and considering compatibility, you can narrow down the cause and find a solution to get your Android device connected to your Miata’s ECU for diagnostics and monitoring.
