Technical Faulty ecu

[Sariah]

Hello guys
I have a t-jet 150 sport bravo
I have a problem with starting the car that ecu doesn't work immediately when turning the key to mar ( engine and oil lights and engine rpm and temperature doesn't give any information on the dashboard ) so i have to disconnect the battery or the ecu fuse to start the car
The error on obd is p0605 ( the pic with attachment)
[ame]https://youtu.be/tjG_TQmLtnc[/ame]
This is a video of my bravo
The error shows that the ecu eprom have a problem
So any chance to repair the ecu ?!
Please help ..
Thanks

 

[1.8Stilo]

Battery maybe?

I had the same set off faults like that on my mito when the battery was on its way out and it was caused by the low voltage.

It could be as simple as the terminals are loose on the battery too. I would also check your earth cables and give the points a clean up.

Whilst in that location, check fuse box and around ecu for water ingress.

 

[Sariah]

Battery is fine and everything you said I've checked before
The problem in in the ecu itself so I have to change it
But I'm asking about if I can fix it ( new ecu is very expensive here )

 

[irc]

There are companies which can repair by post.
However errors almost identical to ones I've seen with a bad battery, even though it tested ok.
Also have seen with corroded earth lead or sensor/ECU connector.
Yet to see a failed ECU without an obvious cause (water/major power spike/physical damage/reprogramming failure), although I'm sure they could happen. If the cause is not clear, it may not be a good idea to repair or replace without finding the root cause, as the new one may get fried in exactly the same way.

 

[aurick86]

Possible ECU faulty... but i always say this: make 100% sure the ECU gets the correct power to all pins as well as the ground.
(just as MES says)
In this case it might be the other fault is related... try unplugging that sensor... might be shorting something out.

 

[Sariah]

First time that problem happend when the battery was bad and before The engine was washed with water ! So one of both is the reason maybe ?
Now battery is new
So can I repair or replace the ecu without fairing of damaging the new one ?!
And if I want to repair it. Any advice how can I repair it ( eprom , reflash , anything could help ) to get my ecu back ?

 

[Sariah]

Which sensor you mean ?
Even in multiecuscan I didn't know which sensor that it mean by

 

[g8rpi]

First time that problem happend when the battery was bad and before The engine was washed with water ! So one of both is the reason maybe ?
Now battery is new
So can I repair or replace the ecu without fairing of damaging the new one ?!
And if I want to repair it. Any advice how can I repair it ( eprom , reflash , anything could help ) to get my ecu back ?

Have you unplugged the ECU connectors and inspected them (both sides)? You may have got water into them. Even if they look OK it's worth giving them a light spray with contct cleaner. Having just sprayed them engage and disengage them couple of times to "wipe" the contacts. If you can't get proper electrical contact cleaner WD-40 is OK but don't use silicone spray.

Robert G8RPI.

 

[Sariah]

No no I didn't unplugg them at all, although I did try to clean it with contact cleaner and no result !

 

[g8rpi]

No no I didn't unplugg them at all, although I did try to clean it with contact cleaner and no result !

The connectors are sealed, to some extent at least, so you can't clean the contacts without disconnecting them. If the engine bay was cleaned with a pressure washer or even a hose with a jet it can force water past the seal. The seal then keeps the moisture in and the voltage between pins starts electrolytic corrosion.

Robert G8RPI.

 

[Sariah]

There are bo signs for any corrosion. I did disconnect it before cleaning
Any way : I'm 75% sure the fault is in the ecu itself with that eprom thing
Any guide of how it could be fixed or something like that ?!

 

[The Panda Nut]

ECU failure is very rare, it is more likely to be somehting affecting the ECU output. WD40 is a very good cleaner and if it were me I would try this on the contacts. It certianly worked for the window switches on my daughters Micra, and also on a previously submerged one touch door window realy that at first seemed to be dead. The error messages chucked out of these ECU's need to be interpreted carefully as often the error messages appear to be nonsense and notrelating to the real fault atleast superficially. There are people who attend to these things but you will need to search online & locally, and also ask all your garage contacts until you find the right person. I knew someone once in Norfolk, but I think they are retired / moved away now so I am sorry cannot actually help. Good luck.

 

[g8rpi]

There are bo signs for any corrosion. I did disconnect it before cleaning
Any way : I'm 75% sure the fault is in the ecu itself with that eprom thing
Any guide of how it could be fixed or something like that ?!

There are ECU repair service companies, but of course I don't know what is available in Syria. I would open it and look for dry joints inside, but I'm an experienced electronics engineer (did my first ECU repairs on Maestros back in the 80's) I don't know if the ECU in the bravo is part of the immobilser system, but it probably is. If this is the case you can't jut fit a second hand ECU. I'm sure someone who knows the Bravo can let us know.

Robet G8RPI.