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ECU Power Down

Old 12-15-01, 07:02 PM
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ECU Power Down

Hey Guys,

What happens to the ECU when you kill power and then power it up. Does it reset anything?

Thanx
Old 12-15-01, 10:07 PM
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you mean disconnect the battery? yes it resets ifself.
Old 12-15-01, 10:53 PM
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The ecu resets, but retains all the codes. If you want to clear the codes, remove the positive terminal and depress the brake pedal for a few seconds.
Old 12-15-01, 10:55 PM
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Thanx, that helps.
Old 12-15-01, 11:19 PM
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Uh, your profile shows this to be an 87. If it is, you do not have to worry about the ECU retaining codes - this ECU (86-88) loses its error codes as soon as the error disappears. It couldn't retain a code to save its life! So don't worry about the brake pedal - you can't erase what isn't there!

Irv, Keith's dad
Old 12-16-01, 01:15 AM
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Originally posted by cymfc3s
The ecu resets, but retains all the codes. If you want to clear the codes, remove the positive terminal and depress the brake pedal for a few seconds.
I've never had to touch my brake pedal. and I've cleared codes a few times while traking down a problem with my O2. just removed the neg termanal for 30 secs or so and the code was gone.
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