As a content creator for techcarusa.com and an auto repair enthusiast, I recently delved into using AlfaOBD software to fine-tune my 2021 Laramie truck after upgrading to larger wheels. My goal was to recalibrate the truck’s computer to accurately reflect the new tire diameter, a task that AlfaOBD is well-regarded for among DIY mechanics and car modification aficionados. This journey highlighted a common hurdle many face when using OBD2 software: Bluetooth connectivity issues, specifically concerning the Bluetooth Chip In Obd2 Port adapters.
Initially, the software setup was straightforward. I downloaded, installed, and licensed AlfaOBD on my laptop, expecting a seamless process. The licensing was indeed quick and efficient, handled by a third party, taking only about 5 to 10 minutes post-installation. This initial phase was encouraging and suggested a smooth operation ahead.
With the new wheels installed and AlfaOBD ready, I proceeded to connect to my truck. For Chrysler vehicles like my Laramie, accessing certain modules requires bypassing the security gateway module. This is where a bypass adapter comes in handy. I used an Amazon adapter, designed to bridge the security module and allow deeper access to the vehicle’s systems. This adapter, essentially a Y-cable, plugs into the factory connectors located behind the driver’s side knee bolster, effectively bypassing the security measures and opening up communication pathways for diagnostic and programming tools.
The physical connection was as described by AlfaOBD’s documentation – disconnect the specified connectors, plug them into the adapter, and then connect the adapter to the truck’s system. So far, so good. To establish the software link, I planned to use the OBDLink MX+ Bluetooth adapter, known for its compatibility and speed. I downloaded the OBDwiz software, intending to pair it with the OBDLink MX+ and my laptop.
This is where the unexpected challenge emerged: my laptop’s Bluetooth module seemed to have failed. It was completely undetectable, not showing up in Device Manager or anywhere else in the system settings. This immediately threw a wrench into my plans, as the intended Bluetooth connection between the OBDLink MX+ (housing the bluetooth chip in obd2 port) and my laptop was non-functional.
Faced with a defunct laptop Bluetooth, I pivoted to my Android phone. Recognizing the necessity to proceed with the recalibration, I downloaded the OBDLink MX+ app and purchased an AlfaOBD license for Android. The OBDLink MX+ adapter, with its integral bluetooth chip in obd2 port, is designed to communicate with both laptops and Android devices, offering flexibility in such situations.
Switching to my Android proved to be the solution. Pairing my phone with the OBDLink MX+ adapter was straightforward, and I successfully established a connection to the truck. I referenced an online video tutorial to guide me through the tire size adjustment process within AlfaOBD. While most of the procedures went smoothly, I encountered a minor hiccup with the ABS Initialization, which remained inactive. However, the critical tire size parameter adjustment was successful.
Using the tire manufacturer’s specifications, I calculated the revolutions per mile and converted this to millimeters per revolution. Inputting this value into AlfaOBD, as guided by the video, effectively recalibrated the speedometer. A road test with Waze running confirmed the accuracy – even after increasing the tire circumference by approximately 8%, the speedometer reading matched the GPS speed up to around 83 mph.
In conclusion, while the initial plan to use my laptop for AlfaOBD with a Bluetooth OBD2 adapter was derailed by unexpected laptop Bluetooth issues, leveraging the bluetooth chip in obd2 port capability of the OBDLink MX+ with an Android phone provided a viable and effective alternative. As a practical measure, I decided to leave the bypass adapter connected, tucked away, as it doesn’t interfere with the normal OBD port function or accessories like my Amp Research steps. This experience underscores the importance of having backup plans and highlights the versatility of modern OBD2 adapters with Bluetooth connectivity. For anyone undertaking similar modifications, ensuring robust Bluetooth functionality on your chosen device is crucial for a smooth diagnostic and programming experience.
