Reset ECU and HVS

[Jimmyl]

Normally disconnect the -ve terminal of battery and wait 5 minutes, 20 minutes to be sure.

 

Then connect back.

 

Radio and clock reset also.

 

 

 

 

what can we achieve from resetting ecu???? after installing hvs and say magfuel????

 

I think the idea is for the ECU(computer) to relearn all the electronics and dynamics properties of your ride faster.

 

I suppose you can also don't reset but wait for the ECU to confirm that the new gadget(magfuel) is permanently changing your ride's dynamics and the ECU should auto-adjust. Just that it may take longer.

[Acemundo]

Another method is to locate the fuse for the radio and clock and take it out for a few minutes. You may find this more convenient than disconnecting the battery.

 

 

does this also reset the radio and clock?

 

ideally if can reset ecu without resetting radio and clock the best

[Acemundo]

the +ve of hvs and -ve of batt are all on the same knob right?

[Mojoe]

No no! you put it that way?

 

the +ve of HVS to the +ve terminal of the batt and -ve of HVS to -ve of batt..

[Acemundo]

no, i did not put it that way or rather saaber installed for me, so i not very sure.

 

but i a bit confused. cos how can i take out the -ve of batt and leave the -ve of hvs intact and the negative of batt is below the -ve hvs????

[Throttleb]

.. yup, but that doesnt re set the ECU, does it, all it does is reset

clock and radio rt?

[Throttleb]

your car handbook should have the fuse locations.

[Throttleb]

I used to do that with my past ride, citreon xantia as the car learns the driving style of the last driver after a while .

I usually do that if my wife takes the car for a week .. sometimes I come back and find the car very sluggish, usually after restting, i teach the autobox that i want to upshift faster.

[Yttrium]

Basically it cuts the power to the ECU... no different from disconnecting the battery.

[Yttrium]

On Hondas the ECU shares the same fuse as the clock and radio. It's a commonly used method to reset the ECU. I'm not sure if it applies to other cars though..

[Soya]

does anyone know how to reset the adaptive shift on the autobox?

[Yttrium]

Yes it will reset the clock and radio.. unless your ride has a seperate fuse for the ECU. what's your ride btw?

[Jimmyl]

For Accent, I read that it used to be something like warm up the engine then did quick gear change many times and it will learn.

 

The latest updates says it's automatic learning, no need to do anything.

 

For the other models of Hyundai, it's the same idea, warm up engine and gearbox to a certain temperature then do the gear change.

 

I am guessing, most makes should be the same.

[Acemundo]

mine's an opel corsa 1.2

 

any idea whether the fuse is shared?

[Mojoe]

ohhh... coz the HVS connection is on top of the battery one... ...

 

I think then just remove the whole HVS first loh... disconnect it from the battery totally and just reset the ECU by removing the -ve of the batt and reconnect back should be okay right?

 

Any experts to comment?

[Soya]

that's the problem - it learns too well. for those doing a lot of city driving, the adaptive autobox's upshifts become slow & draggy.

 

besides taking a day's leave juz to chiong all over for it to re-learn, wonder if there's an easier way like simply removing the -ve terminal for 5 mins.

[Acemundo]

ok lah, if like that i understand...

 

i thought quite strange to disconnect the batt -ve and then still leave hvs -ve there.

[Mojoe]

.. paiseh didn't think of it that way..