Resetting ECU - a how to?

[myr332]

I've noticed a lot of posts stating that to fix certain problems then it may be necessary to reset the ECU. As far as I am aware, the steps to do this are:

1. Disconnect the battery terminals

2. Press the brakes a few times

From a standard ECU point of view, this resets the works and requires the ECU to relearn timings etc..

How does this work with a non-standard ECU that has been tuned? In terms of resetting the CPU, does it also wipe all of the mappings performed by the previous tuner?

I would hate to reset my CPU to find out that it gets me back to the stage of it relearning itself and thus requiring to be tuned once more.

I know this may seem like a fairly obvious question to some, but I am quite interested in the answer none-the-less.

Cheers!

Giles

[Damo]

If u r talking about the power FC then no it will not reset by disconnecting the battery. It has its own backup battery.

What makes u say the ECU is giving u problems?

If u had a few problems due to the ECU then I would imagine u would have to have it tuned on a dyno again.

[myr332]

If u r talking about the power FC then no it will not reset by disconnecting the battery. It has its own backup battery.  

What makes u say the ECU is giving u problems?

If u had a few problems due to the ECU then I would imagine u would have to have it tuned on a dyno again.

Nothing specific to any problems I'm having. I've been reading the forums and notice reccommendations to reset the ECU to fix problems with things such as fuel consumption problems or other various issues.

I was more wondering if this is isolated to just standard ECU's, or if it is something that should be done all all ECU's if required.

[Damo]

Just the standard ECU. It would be a bit of a silly design for an aftermarket ecu to loose hundreds of dollars of tuning maps just from a flat battery.

[srb 33]

My fuel consumtion has improved since resetting the computer. 180 out of half tank, I'm headed for 300 plus, improvement on before 260 (full tank). But I have been driving like a stiff.

What I noticed when I reset it was I went for a drive imediately and my steering was wierd, I had to do a half left turn to keep the car straight. This was I guess the computer resetting it's self.

[myr332]

You have a standard ECU or aftermarket?

[srb 33]

standard computer (which has no reset screw)