Need a little help with SES light and ADLA.

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11-09-2007, 11:03 PM

Quzyle

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Car: 1990 IROC-Z, 1992 Z-28

Engine: 5.0, 5.7

Transmission: one of each

Axle/Gears: Both cars have them!

Need a little help with SES light and ADLA.

First, thanks for a great site. I spend hours just reading. I have a 1990 IROC-Z, with the five speed. When I got the car it would not start. The VATs system was not working. I have a chip burned with out the VATs and the car now runs. I am getting and SES light. So I go get my trusty old AutoXray scanner and hock it up. It says that it can not communicate. I try a few time with no luck. So I us a universal tool (paper clip) and the fans kick on and the ECM starts flashing code 24 (but the speedometer works). Any one know why I can't scan and why code 24 with a working speedometer?

Thanks so much.

Dave