Ecu Unlocking?

[craigmi16 0]

hi i have had problems with my mi16 1.9 and had to put it to an auto sparky he has done all his tests etc and came to the conclusion that my ecu is gone hes not getting certain signals from it so he said i had to get a new one but it had to be unlocked. i have herd that u need to get it unlocked before so if i was able to get another ecu i would have to unlock it so what id like to know is where would you get something like that done would it just be a peugeot garage or somewhere like peugeot ecosse? and what sort of a price should i be looking at for unlocking a 2 row mi16 ecu?

 

any help would be greatly appreciated because this is my daily drive just now and busses are not much fun

[Ryan 99]

1.9 Mi16 ECUs aren't locked. You can just get another one and plug it straight in.

[DrSarty 90 1 Cars]

I'd be tempted to get a second opinion off either another auto electrician or someone from here, as if he thinks it's locked or can be locked then he doesn't know much about your ECU.

[Ryan 99]

Actually yeah. ECUs very rarely die, yet a lot of people are quick to blame them for any electrical problems.

 

What problems were you having?

[craigmi16 0]

im not realy that sure about the electrical side of things but ill give it a try and explain what he has told me

he said that hes getting a crank signal and all other signals that should be present but canot get get a signal from the ecu to the coil or ignition and fuel pump realys. he also mentioned that the coil has 4 pins in it and there is only 3 wires and i no that it ran exelent with only 3 wires but all the wiring diagrams that i have show 4 wires at the coil. he said that he tried to put an earth on it and it just sent his meater mental. i amnot sure that it is even a mi16 loom that is in it i think maby it can be a citroen bx loom.

 

i am kinda stumped with this 1

 

ps the reason it had to go to an auto sparkey is that one day it was going realy well then it developed what fealt like a misfire at low revs ie if i was in 2nd gear doing mibby 15-20 then gave it more throttle it would giv u wiplash then would clear and keep on going just fine so i went home to have a look so the car was stopped for 20 mins and it just wouldnt start again there was no power getting to fuel pump and no power to coil either had pump out it runs fine so can cross that off got a new coil just to make sure but still no joy

 

i have given him another mi16 1.9 2 row ecu from a m8ts but it is a different bosh part number

the part number on my ecu was 0 261 200 119 and my mates was0 261 200 2--

cant remember the last 2 digits of hand but would it work being different part numbers?

 

cheeres craig.

[P_Monty 2]

This sounds like the problem I had with my 8V 205. I traced that to a really sh***y connection to the LT side of the coil.

 

I know nothing about Mi16s, so I could be talking total rubbish, but I thought as a general rule, the coil sat at 12V and got switched to earth by the ignition module, so the sparky randomly earthing the spare connection probably wasn't the best idea.

[craigmi16 0]

like i said i am not very good with wiring so i thought best to leave it with him he is a very good auto sparky comes highly recommended gets all of our city's police cars to do with all their gadgets etc so i was confident with him but if he is telling me i need an unlocked ecu and i have been told earlier^^^ that the 1.9 mi16 ecus are not locked im not to sure now.

what do people think??

 

and are mi16 ecu definitely locked just to make sure before i go and see um and tell um hes wrong?

 

thanks Craig.

[Henry Yorke 269 3 Cars]

Ecosse are not too far and have being doing this stuff for years. A quick call to Diane there may reveal the answer or someone who would have a look.

 

It sort of sounds like something to do with the spark so that would be coil, ignition module, throttle position sensor etc. Then you are into earths etc. Continuity checking will be the solution here. Wiring is the obvious one.

 

However I am no expert, but it requires applied logic to fix. I would doubt the ECU is faulty unless the sparky has tripped it out. Have you tried your ECU in your mates car to see if it runs with that in it?

[large 33]

1.9 mi16 ecus are NOT locked. the later S16 and GTi6 ones are.

[welshpug 1,657]

only very late 2.0 405 Mi16 ecu's are locked.

 

 

its quite a different thing sorting electrical issues to bolting on radios and aerials you need to look at whether the relays have their permanent lives, then look to see if they're getting ignition switched, check the ecu is getting power properly.

 

swap the TDC sensor for a known good unit, only £15 or so from GSF for a new one.

 

119 ecu is an early BX 16v one afaik, don't know of any MI16 ecu's that start 0261 200 2** though

[Miles 331 1 Cars]

As said a few time as with 99% of other Auto Spark's they know little about anything that isn;t std and really you cannot blame them, but he should at least know if he know's much that the 1.9 Mi's never had locked ECU let alone a Alarm system.

Fault could be anything even down to a broken wire which I;ve found before so I would as HEnry's said or buy a converted loom which may work out cheaper

[craigmi16 0]

i have got my car back and all is well the ecu wasnt at fault it was wired wrong he said that the fuel pump only started to prime when crancking because there was no constant going to it but it was backfeeding when engin started to turn. if that made sence to any1 i didnt understand what he was trying to say by backfeeding but it is all sorted and going great now

 

P.S thanx a lot to every 1 that helped me with this one

 

cheers craig

[sport1901966 8]

I have been having issues with the fuel pump not running. What I know is the ecu is responsible for completing the relay circuit to that then powers the fuel pump. The ecu only does this when the engine is turning (ie receiving a signal from the crank sensor).

 

Do you know what he did to fix your problem, it's driving me mad!

[P_Monty 2]

(Post deleted because I thought we were talking about 8Vs, I suddenly realised we're not and I know nothing about Mi16s)....

Edited March 22, 2010 by P_Monty

[Daviewonder 533 3 Cars]

Are you sure about that? I thought (and the HBoL appears to agree) that the fuel pump is on all the time that the ignition is on - the tachy relay (not the ECU) supplies power to the ignition module and the fuel injectors.

 

The ecu earths the relay.

[P_Monty 2]

Rats - you replied before I could delete it