How to program Opel Corsa ECU with Op-com CAN OBD diagnostic tool

What you need:

Op com China clone 2012V CAN OBD diagnostic interface

A laptop running windows XP mode

Vehicle security code

Vehicle model example:

Opel Corsa 2005

Step-by-step instructions:

Install Op-com diagnostic software

Connect Op-com diagnostic interface with vehicle via OBD socket

Select Diagnostics from main menu

Select Automatic Vehicle Identification

Select KWP2000 and choose correct diagnostic connector

Wait until the system detects Control unit parameters

Check and confirm vehicle information

Select engine type/code and choose diagnostic connector

Select Body control module

Select Immobilizer and choose correct diagnostic connector

Click Special Functions on the right column. Enter the security code enable all functions. Many option icons are gray (invalid), you need to enter the security code to enable all of them.  

Select corresponding function, here is the function list:

Read ECU Identification

Read Immobilizer

Reset Engine Control Module

Erase Transponder-Keys

Select Read Immobilizer, click Yes,

Select Reset Engine Control Module, click Yes

Select Programming on the right column

Enter vehicle security code to start program functions

Following ECU program function are available:

Program Immobilizer Function

Program Immobilizer Output

Program Transponder-Keys NEW

Program Transponder-Keys OLD

Vehicle Identification Number Programming

Program Mechanical Key Number

Select specific Program Function, choose the programming routine

For example, select Program Immobilizer Function, choose Immobilizer installed from the drop-down list

Go back to the main menu or exit the Op-com software program if complete ECU programming procedures. 

This is from obd tool website technical support: How to program Opel Corsa ECU with Op-com CAN OBD diagnostic tool