How to enter override E.5.3 on a '90 DeVille

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mdogg1950

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'90 DeVille '97 DeVille

Joined Feb 28, 2005

83 Posts

Discussion Starter • #1 • Nov 6, 2005

Can someone tell me how to enter the ISC motor override E.5.3 on my '90 Deville? The tech manual states:
"With ignition ON, engine OFF, enter ISC motor override E.5.3. Press WARMER button on ECC. The fuel data centershould display E.5.3 and 99 alternately".
I can't get E.5.3 to appear. What am i doing wrong?
Thanks, all!

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