Here just sharing real experience when use GM Tech 2 Hope this helps
I decided to invest in some tools to diagnose my Opel. After a couple weeks of searching all over ebay, aliexpress and other online store, I finally found the cheapest one on www.obd2shop.co.uk, they were very fast to respond and answer all of my questions. I exchanged emails with Customer service for about 3 days before I finally decided to purchase a tech 2 clone here. I ordered it on Tuesday and I picked it up at Friday (I missed the fed ex guy and you have to sign for it). Yes, it only took 3 days delivery!
The quality of this is amazing. I would never be able to tell it was a clone. I hooked it up to my car and was able to replaces Opel Corsa-C ECU.
So here it is….
Below is the procedure, I search and learn from forum members:
- Obtain all ECU pin codes especially second hand ECUs (immobilizer or engine). Scan old ECU to obtain VIN code and then obtain car passes to match.
- Obtain all keys they will be required at end of procedure. SPS program new engine ECU with vehicle engine code and VIN number.
- Configure engine ECU CAN configuration (Engine/ programming/ program CAN configuration) Configure engine ECU variant configuration (Engine/ programming/ program variant configuration)
- Reset engine ECU if second hand ECU use pin code from car pass (body/ immobilizer / additional functions/ reset engine ECU)
Reset immobilizer (body/ immobilizer/ additional functions/ reset immobilizer)
Reset BCM (body/ BCM/ additional functions /reset BCM)
Reset instrument cluster (body/ instrument/ additional functions/ reset instrument) - Program immobilizer function (engine and immobilizer): this will program everything together includes new keys. Have all keys programmed (body/ immobilizer/ programming/ program immobilizer function).
Check and clear all fault codes Engine immobilizer dash BCM ABS and gearbox. Road test and recheck it.
Great! I can see GM Tech 2 replace a new engine ECU for Opel Corsa C successfully!!