Anybody know what the minimum battery disconection time required to reset a UK97 ECU is? 2 hours enough?

Cheers,

Rob

 

I have heard anything from an hour to overnight !
I would leave it overnight - little chance of it getting nicked on that night too !
Think that there is some kind of "battery back up" that also needs time to drain.
or.....http://www.mrtrally.com.au/performance/howresetecu.htm

Ro.

 

Thanks,

I left it off for 3 hours yesterday evening. Anybody know how you can tell it is reset? Will it cycle or something the first time you turn the key after battery reconection?

Cheers,

Rob

 

Why not just connect the plugs under the drivers side........lot quicker.

 

Can't find them, I've even taken the panel off under the Steering Wheel. I can find ECU and Loom etc, but no green or black plugs!

 

How to re-set your ECU unit.
ECU clear memory procedure is as follows for auto and manual transmissions:

With engine at operating temperature, turn engine off. Place gear shift lever into park (auto transmission cars only)
Locate the two ECU check connectors, for most cars they are located under the steering column and consist of a black plastic male and female connector, and a green male female connector. The exact location of the connectors varies with the different year models, but generally they are located under the steering column on the drivers side.
NOTE: sometimes they are still taped over with some small amount of plastic tape, so look hard, they will be there!
With the ignition OFF connect black to black and green to green.
Turn on ignition, do not start the engine, (and for auto transmission, cycle the gearshift lever from park to neutral and back to park ), depress the accelerator pedal to full throttle and hold for a few seconds, and then release.
Start engine and then drive for at least one minute, keeping road speed above 11 Km/h.
ECU is now re-set.
At this point the check engine light should start to flash the all clear signal (steady 1/2 second interval flashes). If the check engine light does not flash, or indicates some other sequence, there is a fault present in the system, and should be professionally checked for necessary repairs.
Once, stop the car and turn off the engine.
Disconnect the plugs.
Job complete


Thanks to MRT site for info.

 

They are single plugs. May be taped up out the way. Not on same side as the ECU. Quite small, not like a multiplug. Similar to what would go on to say the lighting for a cigarette lighter.

[Edited by AlanG - 5/17/2002 12:46:56 PM]

 

OK, I'll take another look tonight.

Cheers,

Rob

 

Cheers Gents,

Found them and followed the instructions to the T. Engine light started flashing within a matter of seconds of driving. All appeared normal i.e. 2 flashes a second. Does this sound OK?

How long will my UK97 ECU take to 'adjust' to the 97 RON fuel?

Regards,

Rob