ecu reset?

[rob77]

Anyone know how to reset the ecu without disconnecting the battery? I have a cyclops p355/375/385 alarm (dunno which one cant find the install invoice for it) and when I disconnect the battery, even after disarming the alarm, it sets the siren off. Anyone have any idea's? If I cant reset the ecu properly the new filter I put on will have to come off till I get a new ecu

[adam 32]

use the little key you get with the alarm, this manually diasbles the siren

[rob77]

I have no key I have a pin thingy where you let the light flash so many times, but thats to start to car and disable the imobiliser.

[skyzerr33]

rob drive the car at 80kph while driving turn the car off then on again and the ecu is reset.

[rob77]

hmmm... I think I'll just disconnect the battery, run in the car press the brake pedal a few times and then quickly reconnect the battery while the siren is going. i've done that before

[Jengi]

Weird...most of them shutdown completely when you unplug the battery?

Do you have a backup battery installed? also?

[rob77]

probably, thats why the siren is going off still.

[raasclaat]

no i have a cyclops alarm (775) and you need the key. The pin number is to disarm the car and mobilise it, it wont properly deactivate the alarm

[summoner]

dunno if its the same for u guys.. but to reset ecu i can pull a fuse out.. maybe check ya fuse box see if theres a relay for ecu?

[deesh]

pull the big blue plug that goes into the ecu maybe, it wont be getting power then, but the alarm still will.

[Nexus_SiX]

Or you could just ask cyclops how to stop the siren going off when you d/c the battery....

[Beeble]

or reset using the grey plug that hides up under the dash... pull the cover off the fuse panel to the right of the steering wheel and use a small piece of wire to short out the ECU diagnostic port and reset it. no battery disconnecting required

[Jon R33]

Originally posted by skyzerr33

rob drive the car at 80kph while driving turn the car off then on again and the ecu is reset.

I've never heard this one before! are you sure about this Troy? and do you need to be doing exactly 80km/hr?

[Guest KILLER-T]

Originally posted by Beeble

or reset using the grey plug that hides up under the dash... pull the cover off the fuse panel to the right of the steering wheel and use a small piece of wire to short out the ECU diagnostic port and reset it. no battery disconnecting required

This is the best way to reset your factory ECU i did it all the time when i had my stock ecu

[kjb_r33]

Originally posted by Jon R33

I've never heard this one before! are you sure about this Troy? and do you need to be doing exactly 80km/hr?

I woulndt recommend doing that, ive seen mufflers blown completly open doin this....

[FIL]

rob... look in the fuse box in the engine bay, pull the one marked "ECU" (or similar... eg. Holden call it PCM for Powertrain control module)

Keep fuse out for 30 seconds or more... and ECU should be reset

(ie. what mark said.... :-)

[rob77]

There is one called engine control, I'd say it'd be that one?

[Beeble]

geees you get up early rob!

just try the shorting out method - takes 2 seconds with a paperclip, the engine check light on dash will light up and flash the diagnostic code at you, and you're away! tucked up above the main dash fuse panel.....

[rob77]

I'm usually up around 7am, I get to work between 8-15 and 8-30 depending on traffic and time I leave. I love my work so much hehe... kidding, its the only way I can find some time to do things without customers.