Having trouble connecting your BAFX Bluetooth OBD-II reader to your ’99 Miata? You’re not alone. Many Mazda Miata owners encounter similar issues when trying to use aftermarket OBD2 adapters. Let’s troubleshoot this step-by-step to get you connected and reading your car’s data.
First, let’s confirm you’re plugging into the correct OBD2 port. For your 1999 Mazda Miata (NB generation), the OBD2 port is typically located inside the cabin. You’re on the right track checking near the fuse box to the left of the driver’s left knee. It’s often positioned above the fuses, and you usually need to remove the fuse box cover to access it easily. While some mechanics might access it from a lower position in the footwell, the port you found is likely the correct one. It’s true this location can feel a bit inconvenient if you’re planning to use a device regularly while driving, as it might get in the way, and driving with the fuse box cover off isn’t ideal long-term.
Once you’ve located the port and plugged in your BAFX reader, seeing the red light is a good sign – it indicates the adapter is receiving power. The next step is pairing your Android device. You mentioned using the code ‘1234’, which is a common default for Bluetooth OBD2 devices, so that should be correct.
The problem seems to arise when the Torque app attempts to connect to your Miata’s ECU (Engine Control Unit). The “No response from vehicle ECU” error suggests a communication problem between the BAFX reader and your car’s computer. Since your BAFX reader works perfectly with your ’98 Civic, we can assume the adapter itself is functional. This points towards a potential compatibility issue or a specific setting needed for the ’99 Miata.
Here are a few things to consider and try:
-
Protocol Selection: While the ‘Auto’ protocol setting should ideally work, sometimes manually specifying the correct protocol can resolve connection issues. OBD-II protocols vary, and while the ’99 Miata is OBD-II compliant, it might communicate using a protocol that your BAFX reader isn’t automatically detecting. Unfortunately, without knowing the specific protocol your Miata uses, this can be a bit of trial and error. Some apps allow you to manually select protocols – explore Torque’s settings to see if you can try different OBD-II protocols manually.
-
Ignition and Engine Status: You’ve tried both with and without the engine running, which is good troubleshooting. Generally, for reading live data and some diagnostic functions, the ignition needs to be in the ‘ON’ position (but engine not necessarily running). Ensure the car’s ignition is at least in the ‘ON’ position when you’re attempting to connect.
-
App Compatibility and Alternatives: You’ve tested with Torque and Car Gauge Lite, both popular OBD2 apps. However, app compatibility can sometimes be a factor. While less likely, it’s worth trying other OBD2 apps to rule out any app-specific issues. There are many free and paid OBD2 apps available on the Google Play Store; trying a different one might surprisingly resolve the connection problem.
-
BAFX Reader Compatibility with NB Miatas: While BAFX readers are generally well-regarded, there’s always a possibility of specific compatibility quirks with certain car models. NB generation Miatas (1999-2005) are OBD-II compliant, but there could be nuances in their implementation that some readers handle better than others. It might be that your specific BAFX reader model isn’t perfectly compatible with the ’99 Miata ECU’s communication style.
If you’ve tried these steps and are still facing the “No response” error, it might unfortunately indicate a compatibility issue between your BAFX reader and your ’99 Miata. While it’s frustrating, it doesn’t necessarily mean your car’s OBD2 system is faulty. In such cases, considering trying a different brand or model of OBD2 reader might be the next logical step. Online Miata forums and communities can be valuable resources for recommendations on OBD2 readers that are known to work reliably with NB Miatas. You might find specific models that other Miata owners have successfully used.
