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VATS problem?

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Old 09-13-2017, 01:52 PM   #1
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VATS problem?

The car will now turnover but will not fire. All I did was to replace the old steering column with one from a doner car along with the VATS module. I am attempting to diagnose the problem? 1990 IROC-Z is the car.

Last edited by ANDYZ28; 09-13-2017 at 02:00 PM. Reason: Correction
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Old 09-13-2017, 02:33 PM   #2
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Re: VATS problem?

Tpi f10 blue wire of the ecm should have 2.5v or a 30-50hz signal if the passkey is working correctly.
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Old 09-13-2017, 02:36 PM   #3
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Re: VATS problem?

OK, I will check it out and let you know how I made out.
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Old 09-13-2017, 02:46 PM   #4
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Re: VATS problem?

I see three connectors at the ECM which one is it.
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Old 09-13-2017, 03:18 PM   #5
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Re: VATS problem?

Yellow connector cavity f10
http://tpiparts.net/1227730_pinout_diagram
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Old 09-13-2017, 03:36 PM   #6
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Re: VATS problem?

My original post SHOULD HAVE REAR; Car will now not turn over!
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Old 09-13-2017, 04:09 PM   #7
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Re: VATS problem?

To at least get the starter to crank you can bypass the enable relay. The two outer wires get connected yellow and green large gauge wires. You can ohm the key and make sure the resistance is the same at the two white wires at the bottom of the column. The most common failure of the vats is the key reader.
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Old 09-13-2017, 04:35 PM   #8
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Re: VATS problem?

I will check out the key with my multimeter the auto ranging function is PINA. It showed no DC voltage there. I suppose the best thing to do is just go and get a new key and try that out first.

Thanks, Andy
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Old 09-14-2017, 01:14 PM   #9
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Re: VATS problem?

The new key did not work. Reprogram ECM?
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Old 09-14-2017, 05:09 PM   #10
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Re: VATS problem?

Quote:
Originally Posted by ANDYZ28 View Post
The new key did not work. Reprogram ECM?
If your wanting to bypass it for good having it reprogrammed out or use a hz modulator.
https://m.ebay.com/itm/281813159375
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Old 09-15-2017, 07:56 AM   #11
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Re: VATS problem?

Who do I get to reprogram it?
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Old 09-15-2017, 11:35 AM   #12
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Re: VATS problem?

I have decided to install a 7.5K resistor (key # 13) in the wire harness, and be done with all of this.
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Old 09-15-2017, 02:58 PM   #13
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Re: VATS problem?

Quote:
Originally Posted by ANDYZ28 View Post
Who do I get to reprogram it?
I can assist there, glad it was just a easy resistor fix
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Old 09-15-2017, 05:29 PM   #14
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Re: VATS problem?

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Originally Posted by Tuned Performance View Post
I can assist there, glad it was just a easy resistor fix
I will now when they arrive on Monday.
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