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- - ECU Power Down (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/ecu-power-down-39057/)

Pacey3182

12-15-01 07:02 PM

ECU Power Down

Hey Guys,

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

Thanx

Scott 89t2

12-15-01 10:07 PM

you mean disconnect the battery? yes it resets ifself.

cymfc3s

12-15-01 10:53 PM

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.

Pacey3182

12-15-01 10:55 PM

Thanx, that helps.

Keith

12-15-01 11:19 PM

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! :D So don't worry about the brake pedal - you can't erase what isn't there! ;)

Irv, Keith's dad :cool:

Scott 89t2

12-16-01 01:15 AM

Quote:

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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