Their differences lie in different microcontrollers and their firmware.

Let’s start with the fact that you do not visually distinguish between two versions of the adapter.ĭifferences between ELM327 adapters version 1.5 and 2.1 Unpair the Bluetooth device and pair it again.Make sure the paired OBD2 scanner is selected within the app’s settings if it won’t connect (see step 3).

Unplug and plug in the Scanner from the OBDII port, then re-scan for Bluetooth devices.

Turn off Bluetooth, turn it back on and re-scan for Bluetooth devices.

Unpair any existing Bluetooth devices such as a headset or speaker.

Make sure the scanner is plugged into the OBDII Port and ignition is on.

All 4 icons will be solid blue when it’s connected (Torque). This step is critical because the App won’t know to detect the ELM327 Scanner and it won’t connect to the ECU!ĥ. Go back to the App’s main menu and it will begin establishing a connection with the scanner. Then go to “OBD2 Adapter Settings”, then “Choose Bluetooth Device”, and then select the paired Scanner. Go to the Settings page by pressing the Menu button on your device. The name of the scanner will vary depending on the model: Examples would be OBDII, OBD-II, VLink, ELM327, OBD2,Ĥ. Open your preferred app. Turn on Bluetooth, scan for the nearby devices and pair your phone with the scanner. The engine will be off, but this provides power to your dash lights, radio and also the OBDII diagnostic port.ģ. From your Android Smartphone or tablet, go to your SETTINGS, then WIRELESS & NETWORKS, then BLUETOOTH SETTINGS. The location will vary on each car, but it’s usually found within arm’s reach under the driver’s side dashboard, under the steering wheel.Ģ. Turn on your ignition by turning your key to the 2 nd turn. Carbon monoxide fumes are produced by your engine’s exhaust gases.ġ. Locate your car’s OBDII diagnostic port and plug in your scanner. Always make sure there is good ventilation to prevent carbon monoxide poisoning.

SAFETY WARNING: Never start and run your engine inside of a closed garage.

Scanmaster elm 2.1 pairing code