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Diagnostic Circuit Check

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Old May 5, 2005 | 10:21 PM
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Default Diagnostic Circuit Check
My service engine light was on constantly while running so I purchased a GM Code Scanner. Error code indicated bad MAF, so I replaced it and reset the computer. Now this first time I run the car the Service engine light stays off and every thing runs fine...the next time the service engine ligth returns so I hooked up the scanner and the light does not blink to start indicating that I need to perform a 'diagnostic circuit check' refering to a chart in the vehicle service manual. The only one I have at this time is the HAYES manual which does not mention this chart. Any ideas on this
'diagnostic circuit check' and how to proceed.

Thanks
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Old May 6, 2005 | 12:32 AM
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Why in the world don't you tell us what year?
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Old May 6, 2005 | 02:30 AM
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Sorry...1987 is the year
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Old May 6, 2005 | 08:28 AM
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Is this what your looking for..... http://members.shaw.ca/corvette86/Sc...it%20Check.pdf
Let me know, i have all the charts on my hard drive.
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Old May 6, 2005 | 10:25 PM
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Default Possibly Getting warmer
Do you have the A-1, A-2 and A-3 Charts?

Many thanks.
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Old May 7, 2005 | 08:56 AM
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Originally Posted by C4newbie
Do you have the A-1, A-2 and A-3 Charts?

Many thanks.
http://members.shaw.ca/agent86/Charts%20A1-A3.pdf
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Old May 8, 2005 | 01:27 AM
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Thanks again, will give those a try.
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Old May 8, 2005 | 09:27 AM
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Anytime
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Old May 15, 2005 | 04:42 PM
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Default btw
Ur car pics are smoking...what kind of paint did you use for the yellow on the engine?
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Old May 15, 2005 | 06:56 PM
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Originally Posted by C4newbie
Ur car pics are smoking...what kind of paint did you use for the yellow on the engine?
Thanks
I used PPG Concept Paint
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Old May 16, 2005 | 01:49 PM
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Originally Posted by C4newbie
Sorry...1987 is the year
Try replacing the MAF power relay and burnoff relay. This may solve your problem. They are only about $10 each. They are located together on the firewall right behind the battery. Had your same problem and this fixed mine. Cheers

p.s. Autozone was giving away a free "jumper key" to check the "check engine" codes on the ALDL. I think they still do.
Last edited by PierEagle; May 16, 2005 at 01:53 PM.
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Old May 16, 2005 | 01:54 PM
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Thanks again!
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