How To using GM Tech 2 reprogram any module

Hello there!
Today I will simply tell you some of the possible problems and programming.
So, if your vetronix tech 2 is working, but something goes wrong and something goes wrong, the first thing we need to do is retest the device.
If you have DLC 1, TPU, CCD, DLC2 – FAIL. Then break the device and carefully solder all the chips we see on the motherboard. If the error in the block VCI then parses it, and also parses all the languages. Only after all of these actions, if you can not fix the error, consider buying a new motherboard from

Now let’s talk about programming.
Disagreement here. Some people say that you can assemble with a cheap Chinese card. Some people say that you only need to use the original one, of which there is an adapter for write protection. If a cheap card flies behind the firmware, try rewriting the software again, but wipe it all before writing.
Another method of firmware is “cross cutting.” In short, this means that the Tech 2 Scan Tool can be connected to both the machine and the PC. The management process itself passes GlobalTIS.
You may need a PC driver to see Tech 2 as driver J2534.
Good luck, good luck.

PS: There are no DB9 connectors on some laptops. Here you can buy an adapter db9 to USB.

How to do self test RS232 cable by GM Tech2 scanner

If you need to run TIS2000 software on PC, you have to connect GM Tech2 scanner using the RS232 cable with the DB9 Adapter to a serial COM Port at the PC. If you cannot get the Tech 2 scan tool connect to PC or fail to communication well, the best way is to connect the RS232-DB9 adapter correctly and then run a RS232 self test.

GM TECH 2 Features:

1) GM software in the Tech 2 Flash means the most comprehensive diagnostic software available for late model GM vehicles.
2) Support for on-board diagnostics on all GM systems 1992 thru current year.
3) Removable hardware modules provide insurance against scan tool obsolescence.
4) Large, easy-to-read backlit screen.
5) RS232 & RS485 ports provide the avenue to connect future devices to your Tech 2 Flash.
6) Ability to capture stored DTCs, Freeze Frame, and Failure Record for later review.
7) Ability to view the status of vehicle diagnostic tests as they run.
8) Bi-directional The authentic GM 1992-current year software will provide full bi-directional control when performing power train, chassis, and body diagnostics.

GM Tech2 gm diagnostic scanner comes with several connectors, including a RS232 cable and RS232-DB9 adapter (mark red circle below)
Tech2 RS232 Adapter
1) Follow the cable pinout to connect the cable correctly
Tech2 DB9-JR45 RS232 cable adapter pinout
Pinout RJ45 to DB9 cable
Tech2 RS232 Adapter

BD-9 to RJ45
9——–not connected

2) Then do a RS232 cable self test

How to do Tech 2 RS232 self test?

1. Power up the Tech2. Connect RS232 cable with Tech II scanner main unit.
Tech II scanner main unit
2. Come to main menu. Select F4:Tool Options
GM Tech2 scanner RS232 cable self test
3. Select F3: Self Test
GM Tech2 scanner RS232 cable self test
4. Follow the system prompts:
Before running the Tech 2 self test:
CANdi interface must not be connected
ALDL loopback should be connected
Failure to follow these instructions may invalidate the self test
Press EXIT to continue
GM Tech2 scanner RS232 cable self test
5. Select F3: Selectable main PCB
GM Tech2 scanner RS232 cable self test
6. Select F2:RS232 LoopBack
GM Tech2 scanner RS232 cable self test
7. Tech2 RS232 cable self test has passed
GM Tech2 scanner RS232 cable self test
If RS232 cable passes self test, the commutation between Tech2 scanner and PC is well built.