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Testing a Computer on a PT

 
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Old 06 Feb 2013, 08:03 pm
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Default Testing a Computer on a PT

Any one know if the PT PCM can be tested before just buying one?
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Old 06 Feb 2013, 08:08 pm
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Default Re: Testing a Computer on a PT

Have you tried the dealer or just a repair shop ?oops What is it doing ?or won't it start
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Old 06 Feb 2013, 08:29 pm
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Default Re: Testing a Computer on a PT

Cant get a straight answer from a repair shop or dealer. No start no communication with a scan tool. Tried lots of other things. Pretty sure it is PCM but would like to test first.
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Old 07 Feb 2013, 03:39 pm
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Default Re: Testing a Computer on a PT

Quote:
Originally Posted by thequadx View Post
Cant get a straight answer from a repair shop or dealer. No start no communication with a scan tool. Tried lots of other things. Pretty sure it is PCM but would like to test first.
You can't test the PCM if you don't have any communication with it. The only thing you can try is checking the wiring to the black connector for power and grounds. If all you wiring is good, and you cannot communicate with the PCM, you need to replace it.
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Old 07 Feb 2013, 08:49 pm
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Default Re: Testing a Computer on a PT

Quote:
Originally Posted by thequadx View Post
Cant get a straight answer from a repair shop or dealer. No start no communication with a scan tool. Tried lots of other things. Pretty sure it is PCM but would like to test first.
If you do the "key trick" do you get "done"?
If not, I'd sure say your PCM is toast.
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Old 07 Feb 2013, 11:13 pm
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Default Re: Testing a Computer on a PT

no response on the key trick guess I will bite the bullet
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Old 08 Feb 2013, 12:04 am
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Default Re: Testing a Computer on a PT

The "key dance" trick does not determine a faulty ECU. If the scan tool is in the ECU port access correctly and no damage to the port with a no communication readout the ECU has a problem which can not be resolved without removing it and examine by qualified OEM ECU Technician with proper diagnostic tools for this or a shop that provides this service.

We get DOA ECU occasionally and choose to replace them as opposed to a diagnostic check because of the expense to the customer.
If the ignition switch has wear ( which most due) on the contacts the "key Dance" will not work effectively for even viewing codes. It has always been a very primitive way to diagnose anything on any vehicles produced from 2000 and up using that method.
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Last edited by NitroPT; 08 Feb 2013 at 12:09 am.
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