Bluetooth Data Link Connection Help

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General Bluetooth Interface Information

The NVH app calculates the most common types of vehicle vibrations with no additional tools required. Engine speed related vibrations, although rare, can be an exception.

If your vehicle has an engine speed related vibration, the NVH app can read engine RPM directly from your vehicle’s Data Link Connector (DLC) for improved diagnostic results. Reading engine RPM directly requires a Bluetooth diagnostic tool.

If you are a full-time service professional, field service engineer, field technical specialist, instructor, technician, or mechanic. you may want to purchase the Bluetooth diagnostic tool for regular use.

Currently, the only Bluetooth diagnostic tool that the NVH app supports is made by GoPoint Technology – The BT1A. It supports the iPhone, iPad* and Android devices.

Do I need a Bluetooth Interface?

You may need an optional Bluetooth datalink connector (DLC) interface for your vehicle depending upon what type of transmission you have. There are five main types of transmissions on the road today (Listed by popularity):

  1. Automatic Shifted Transmissions – A Bluetooth DLC interface tool is not needed, but it can speed up engine speed related vibration diagnosis. During diagnostics, the NVH app estimates engine RPM based upon your vehicle’s transmission gear ratios and the vehicle speed at which each shift takes place. Without a Bluetooth data link connection, the estimated engine RPM is only accurate if you are maintaining a steady engine speed on a long, flat, road surface (Use cruise control where possible). Higher vehicle speeds typically give better results. For improved estimated engine RPM accuracy, adjust the shifting speeds for your transmission in the Settings Screen.
  2. Continuously Variable Transmission (CVT)** – A Bluetooth DLC interface tool is needed to diagnose engine speed related vibrations. Diagnosing tire speed and driveshaft speed related vibrations do not require a Bluetooth DLC interface tool.
  3. Manual Shifted Transmissions – A Bluetooth DLC interface tool is not needed, but it can speed up engine speed related vibration diagnosis. Adjust the shifting speeds to match when you shift your transmission in the Settings Screen and you are ready to begin vibration diagnosis.
  4. Hybrid-Electric Vehicle Transmissions – A Bluetooth DLC interface tool is needed to diagnose engine speed related vibrations. Diagnosing tire speed and driveshaft speed related vibrations do not require a Bluetooth DLC interface tool.
  5. Class 4-8 Medium-Duty (MD) and Heavy-Duty (HD) Truck Transmissions – A Bluetooth DLC interface tool and j1939 adapter cable is needed to diagnose engine speed related vibrations. Diagnosing tire speed and driveshaft speed related vibrations do not require a Bluetooth DLC interface tool.

**Subaru and Nissan use CVT transmissions in most of their vehicles. Almost all other vehicle manufacturers use a CVT in one or more of their vehicles. A CVT does not shift like a traditional transmission; however, many CVT vehicles use paddle shifters on the steering wheel to give the driver the illusion of actually shifting.

Purchasing Information

  • Visit www.gopointtech.com for BT1A purchase information.
  • The BT1A comes with a Quick Start Guide to help you pair it with your iPhone or iPad*. Pairing instructions can also be found below.
  • Visit www.gopointtech.com or ebay.com for Class 4-8 MD/HD truck 9-pin j1939 to 16-pin J1962 OBD2 adapter cable purchase information.
  • Visit ebay.com for a round black 9-pin J1939 type-1 to round green J1939 type-2 crossover connector purchase information.

Initial Setup and Pairing Instructions

Use the following procedure to pair the BT1A with your iPhone or iPad* and use it with the NVH app. This procedure only needs to be done one time per iPhone or iPad*.

  1. Plug the BT1A into the Data Link Connector (DLC) under your dashboard on the driver’s side. There may be a small removable cover over the connector.
  2. Start, or power on, your vehicle and wait for the BT1A to beep. This typically takes a 5-10 seconds.
  3. Open Settings in your iPhone or iPad* and then select Bluetooth

  4. If Bluetooth is Off, turn it On (Green is on). Your iPhone or iPad* will begin searching for the BT1A.
  5. When you see the GoPoint BT1A on the screen under Devices, select it to Pair with your iPhone or iPad*. Enter the passcode of 1234 and then select Pair in the upper right corner of the screen.
  6. Wait until the My Devices list shows that the GoPoint BT1A is Connected.
  7. Open the NVH app and select Settings (the Gear icon in the lower right of the screen). Turn on Bluetooth Data Link under Data Collection (Green is on).
  8. Select the Data Link connector (DLC) type your vehicle uses:
    1. 16-pin – For all cars and Class 1-3 light-duty trucks since 1996 (SAE J1962).
    2. 9-pin 250kb – For Class 4-8 MD/HD Trucks with the round black 9-pin SAE J1939 type-1 connector.
      1. A 9-pin j1939 to 16-pin OBD2 adapter cable is required to interface with the BT1A. The adapter cable can be found on eBay and Amazon from various sellers.
    3. 9-pin 500kb – For Class 4-8 MD/HD Trucks with the round green 9-pin SAE J1939 type-2 connector.
      1. A round black 9-pin J1939 type-1 to round green J1939 type-2 crossover connector is required to connect to the 9-pin j1939 to 16-pin OBD2 adapter cable. The adapter and adapter cable can be found on eBay and Amazon from various sellers.
  9. The NVH app is now ready to use the Bluetooth diagnostic tool to read engine RPM. The NVH app detects whether it can connect with the Bluetooth interface to read engine RPM or not. If the NVH app cannot connect with the Bluetooth interface, the NVH app will revert back to estimating engine RPM.

*iPad with internal GPS (Cellular models) is needed for the NVH app to function. Cellular data service is not required. iPhone, iPod, and iPad are trademarks of Apple Inc., registered in the U.S. and other countries.