OBD2 does not connect

If you are using one of those Bluetooth scanners that you get from eBay, it is the problem. From what I have seen, they do not do too well with Chevrolet's. Also, if your cigarette lighter is not working, check the fuse for it, as that fuse also powers the OBD2 connector. Let us know.

Good morning.

Auto Tell is a good tester. It is simple and will give you advanced data as well that you need. Codes never identify bad parts just failed systems.

Check for power to pins 1 and 16 on the connector at the car. 16 is power and 1 is ground. you can use a voltmeter to check. if this is good, then it can be either a serial data line issue or the PCM itself.

Roy.

Thank you so much, I will do these steps and let you know!

You are welcome.

Keep us updated.

I am still fixing it. I did not have the time to check it. But I have one more question, I have a problem with my ignition lock, it jams a little when starting. Can I fix it or buy another one?

Try spraying some WD40 in the cylinder and see if that helps. Otherwise you will need to replace it.

Roy

You can also spray the key down and then put it in the cylinder.

Thank you all! I started to check pin connector and I have a question. Here is a picture . What I this yellow connector? And those taped block? I were looking for any switch maybe, too, but found these things. Maybe something wrong with this taped black block? And what is this yellow connector?

I am sorry, there is no picture attached. Can you send it again so we can view it?
Roy

Sorry, I thought it was sent. Here it is.

Also, I have a question regarding maybe security wire. I cannot start the van, and I am very confused because I open doors with this remote key without the problem. What it can be and what do I need to check? Thank you!

Yellow connectors indicate air bag circuits. Do not touch them for the risk of inflating the airbag.

Not sure of the other piece. Let me check and see if I can identify it.

What security wire?

Roy

Thank you for any help. About wire, I just do not know what to do with it and thought maybe there are any kind of security wire or switch. Why does the car not start?

We do not have a connection with the previous owner and he told us that the car was I working condition until we bought it. But now we cannot start it.

Okay, does the starter work?

https://www.2carpros.com/articles/how-a-starter-and-solenoid-works

Yes, everything moves but does not start. And I do not hear that gas pump works. No sound. We have replaced crankshaft sensor but still no changes. We thought maybe it is a wire lime in the YouTube video I will attach it in the next message.

Https://www.youtube.com/watch?v=xnmBSmLlpCM

I think we should back up and see why there is no communication which is job one. Here is the wiring diagram for the ALDL connector you should check all of the fuses as well:

https://www.2carpros.com/articles/how-to-check-wiring

Check the fuse (aux power).

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If everything checks out it sounds like the PCM is bad and needs to be replaced which you can do by getting a used one and plugging it in, (this sometimes works) if not you will need to have it programmed.

Check out the diagrams (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken