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User manual

/User manual



  • An OBD-II compatible car : all vehicles manufactured or imported are :
    • In the United States since 1996
    • In Europe
      • Gasoline since 2001
      • Diesel since 2003
      • LPG since 2001
  • An OBD-II Bluetooth device : easy to and available for less than 10 $ (Amazon …)
  • Having an Android/iPhone Smartphone


How it works ?


1- Installer l’apllication CarDiag

Install the free and intuitive “CarDiag” application from the Google Play Store or the App Store.

2- Buy your ELM327 OBD2 car diagnostic tool

Online or in specialized stores for less than 10 € (ex. Amazon)


3- Locate the Diagnostic Link Connector in your vehicle

This is a somewhat triangular shaped 16-pin connector that is commonly located underneath the left hand side of the dash near the steering column. If you have trouble locating the Link Connector, refer to the owner’s manual, or search for the location on the internet using your car’s model and year


4- Plug ELM327 Bluetooth into Car’s OBD Port

Plug ELM327 Bluetooth into Car’s OBD Port, then turn your ignition on

5- Connect to ELM327 Bluetooth

On your Phone / Tablet – go to

  1. Settings
  2. Bluetooth
  3. Connect to Bluetooth signal with names similar to : OBDII, OBD-II, ELM327, VLink, Can OBDII, etc.

PS : Sometimes, you have to disconnect all other bluetooth devices already connected to your Smartphone.


6- Connect ELM327 Device

Pair code : 1234

If above doesn’t pair, then : 0000

7- Start CarDiag App

CarDiag App communicates now with the onboard computers in your vehicle.\nDiscover all features : Diagnose Your Vehicle, Clear Trouble Codes, Reset your Check Engine Light, See Current Data, Freeze Frame Data And Much More