What tools do I need to know what codes my computer is putting out?
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
connect the A and B terminals of the ALDL connector with a wire or paperclip (upper right hand terminals), turn the ignition on the ON position and the CHECK ENGINE LIGHT will blink the codes.
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From: Washington State
Ok, I just did this and my SES light started blinking but no codes were shown, not even a code 12. Does code 12 only appear if there is a error code or should it appear even if there is no error code?
thanks again
thanks again
Last edited by vrooom305; Sep 21, 2003 at 10:04 AM.
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From: Aurora,Il,
Car: 89 Camaro
Engine: 97 LT1
Transmission: T-5
Axle/Gears: 323 Posi
yes the Code 12 should always be there. You have to count the blinks. It should repeat 3 times then go to the next code if any. If no code 12 then it may be a problem with the ECM itself.
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