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Launch X431 EasyDiag 3.0 Plus How to download,Register and Update

Launch X431 EasyDiag 3.0 Plus came,Most people prefer EasyDiag 3.0 Plus to a one-to-one kit is because when they change their car in the future, all they need to do is to buy the software for their next car instead of buying a brand new diagnostic kit.

Compared with LAUNCH Easydiag 2.0 Plus, Easydiag 3.0 Plus is better in the following aspects.


LAUNCH Easydiag 3.0 Plus

LAUNCH Easydiag 2.0 Plus







$149 with 2 free car software

$180 with 2 free car software



√  Bluetooth 4.2

√ Bluetooth 2.0






Read and clear codes

view enhanced live data






and more


Asian makes

European makes

North American makes


Customizable software

2 free vechicles software+DEMO+EOBD

2 free vechicles software+DEMO+EOBD



Online for 1-year free

Online for 1-year free



Multi-language available to download

Multi-language available to download

LAUNCH Easydiag 3.0 Plus VS LAUNCH Easydiag 3.0:

LAUNCH Easydiag 3.0 Plus includes 2 free vehicles’ software + DEMO + EOBD

LAUNCH Easydiag 3.0 includes hardware+ EOBD+ DEMO


LAUNCH Easydiag 2.0 Plus VS LAUNCH Easydiag 2.0:

LAUNCH Easydiag 2.0 Plus includes 2 free vehicles’ software + DEMO + EOBD

LAUNCH Easydiag 2.0 includes hardware+ EOBD+ DEMO

Notice: Demo and EOBD also belong to one of the car model. if you downloaded Demo and EOBD first, then you cannot download other car brand software for free, we suggest you download the car software you need first, then download Demo and EOBD for free.


This is an informative post on how to use original Launch easydiag 3.0 for IOS / Android incl. Android / IOS app download, registration, activation, login, buy the car brand software, download car brand software, diagnostic, update etc.

How to Use Launch X431 Easydiag 3.0?

Main procedure:

1.Download App




5.Buy car software

6.Download car software



Here we go one by one.

  1. Download easydiag APP

IOS: In the app store, search “EasyDiag” .

Android: In the google play, search “Easydiag”

Step 1: Turn on your Smart Device.

Step 2: Go into the Google or Android Play Store:

Google Play can be found in the following url as well:

Step: 3: Input the keyword “Easy Diag” in the search bar and then click the Easy Diag software icon to download.




  1. Register -> Active -> Login




  1. Buy the car software what you want


1) One brand car software price: 50USD

2)3 brand cars software price:99.95USD

3)5 brand cars software price: 149.95USD

New user get free EOBD software.


After the free-update expire, the update fee is 29.95USD






  1. Download the car software and update


After pay the car brand software successfully, you can download them.


Update method:

  1. On the home page, click on the “Software upgrade” to update all the car brands you paid.
  2. To update one single car brand, please go to the specific page and quickly enter the “Software upgrade” page.




  1. Diagnostics

1) Accessible systems: Engine, ABS, SRS, Transmission and more

2) Diagnostic Functions: Read and clear codes and view enhanced live data etc.

3) Diagnostics Feedback:

If you met any question on the diagnostic, please provide the dealer with the Launch Easydiag 3.0 serial number, car brand, model & year.



1 .Communications error with vehicle ECU?

Please kindly check:

1 Whether the dongle is properly connected.

2 Whether the vehicle ignition switch is on.

3 If all checks are normal, send vehicle year, make , model and VIN number to us using Diagnostic Feedback feature.

2.Failed to enter vehicle ECU system?

Please confirm:

1 Whether the vehicle is equipped with the system.

2 Whether the tested system is electronic control system.

3 Whether the dongle is correctly connected.

4 Whether the vehicle ignition switch is on If all checks are normal, send vehicle year, make , model and VIN number to us using Diagnostic Feedback feature.

3.The diagnostic application is failing?

1 Press the Home key to navigate to the home screen.

2 Select “Settings”->“Apps”.

3 Select the application name from the APP list.

4 Select “Force Stop”,and then tap “OK” to confirm.

5 Select “Clear Date”, and then tap “OK” to confirm.

Precautions on using easydiag 3.0

1. This device is a precision electronic instrument. Handle it with care,Avoid dropping.

2. This device only operates on the 12V passenger vehicles equipped with OBD II management system.

3. To avoid damage to this device due to frequent use, you are recommended to use the included extension cable to connect it to vehicle’s DLC.

4. Turn off the ignition switch while plugging/unplugging the device.

5. Be sure to always remove the device once testing and /or diagnosis is complete,Failure to do so may result in a drained or weakened battery.



Tech II programs remote control door lock receiver (RCDLR)

Purpose: I need to replace the remote control door lock receiver (RCDLR) on my European C6.


Tool: I have a Tech2 scan tool



According to the “GM Service Manual” it says: “Connect a scan tool to the vehicle using the pass-thru This method requires connecting the scan tool to the vehicle, Then connecting the Techline Terminals RS-232 cable to the scan tool.. ”


Tech II is connected to a computer using TIS2000 software, hence the needed dongle cable from the Tech II scanner to the computer running TIS2000 (connected in on a RS232 port).

This allows you to download the needed programming from GM directly for the RCDLR in the first place via/to the computer running TIS2000, then push it through the tech II to program the RCDLR through the OBD II port once the RCDLR is mounted in the car.

Note: some have had luck with a USB dongle, instead of RS232 Tech II dongle cable, but don’t bank that you will have the same luck and best to have a computer that has a RS-232 port to run TIS2000 on.



Important: Prior to programming per the information below, the Radio and HVAC Fuses MUST be removed and the ignition must be in “Key On Engine Off Mode” The radio and HVAC fuses can be located in the BCM fuse block on the passengers floor electrical center. One of the fuses is labeled RDO/S’BAND/VICS and the other is labeled HVAC/PWR SND.


Program the RCDLR with revised software using TIS-2-WEB “Pass Through” method. When programming, it is required to select “Replace and Reprogram ECU”.


Important: If the programming procedure does not finish successfully and the RCDLR appears to be in a “locked up” state do not turn off the ignition, follow the directions below…


The RCDLR can be reset by removing the RCDLR fuse (#11 in the UBEC) for at least 30 seconds or longer and then reinstalling it. Once this fuse is reinstalled in the UBEC, there will be a 2 minute window to restart the programming of the RCDLR through TIS2WEB. Failure to restart the programming of the RCDLR through TIS2WEB within 2 minutes may cause programming to fail and this procedure will need to be repeated. It is recommended that the Tech 2 remain connected to the vehicle and that the TIS2WEB application is open and ready to program the vehicle prior to reinstalling RCDLR fuse #11 into the UBEC.



This video will walk you through both stand alone, and pass through programming (go to 8:30 for pass through and note that the op is using a tis2web disc to access the needed programming, instead of pulling it down over the web).



And again, As for the latest RCDLR updates, tis2web is needed for that to pull the needed program; unless you can get your hands on a tis-2-web legacy disc current enough for your car and there are not any updates from that point forward from the disc.