Fried ECU?

[millzy]

Hello eveyone,

I've had my first Evo V for about 3 months. All was well until the battery kept dieing on me.

I found the cause of the problem was that the drive belt was loose so obviously the alternator wasnt putting any charge back into the battery.

The tensioner has broke off so i replaced this and also the belt. The battery being flat I borrowed my Dads car to give it a jump.

Now for the nasty bit...


Me being to eager to get my car started I put the leads on the wrong way.

After about 10 second of no power and realising I removed them and swapped them the right way around.

I put the keys back in the car, disabled the immobiliser and went to turn it over. It was turning over but just wouldn't fire up.

So im thinking bollocks, ive destroyed the ECU.

I called up an auto electrician and he was convinced it would just be a fuse. After the phone call and I had a thorough look through all the fuses.

I noticed that a blue 100A fuse had blown in the main box on the right of the engine comp. The diagram showed the symbol of a battery and theres two of those.

So my theory was one controlled a circuit of the electrics for things such as the immobilisers, lights, clocks etc. The other to start the car some how.

Ive replaced this fuse and still the cars turning but not firing.

The car seems to be completely normal, no lights on the dash display and sound normal turning over.

Any ideas please?

Im aware im a complete arse doing this in the first place and relying on my car for work its turning into a complete ball ache.

Id appreciate some help and advice.

Cheers,

Millzy

 

[Simon@NTS]

check ALL fuses first, ie engine management fuses etc

 

[Wingnut247]

+1 on checking all fuses! Dout you have fried ecu as lots of fail safe fuses in the wiring! If it is ecu i have i standard V board!

 

[millzy]

Hi, Thanks for the speedy replies.

Sbn, could you point me in the right direction of the engine management fuse locations please if there located away from the main box's. cheers.

Thanks Wingnut for some reassurance. I may be able to get a bit more sleep tonight haha.

As for the fuses, i've checked all the ones in the large box on the right with the chunky fuses. Battery

I checked the smaller box on the back left near the strut. Seems to look like fuses for power steering pump, water pump etc.

I Found a small box with two fuses near the air filter if I remember rightly.

Im aware of the fuses located under the dash drivers side.

I have downloaded the service manual but I cant seem to find any simple fuse diagram guides. They look more like wiring diagrams in the fuse section.



Heres one for you's though. Im not familair with ECU's and im learning as im going along but when I bought the car the guy told me the ECU had been removed. Apprently the Apexi boost controller replaced it. Was he blagging me or what?

Just when I went to took a look at the ECU the other for a visual inspection Im certain it wasnt there behind the glove box where it was meant to be?

Thanks again!

 

[Simon@NTS]

under the driver side dash

 

[Simon@NTS]

5 has large fuse box on the right hand side by airfilter also

 

[millzy]

check ALL fuses first, ie engine management fuses etc

+1 on checking all fuses! Dout you have fried ecu as lots of fail safe fuses in the wiring! If it is ecu i have i standard V board!

5 has large fuse box on the right hand side by airfilter also

Nice one sbn, ill double check those ones under the dash.

cheers.

 

[Simon@NTS]

take each one out and visually inspect it

 

[evo arm's m7960]

this may help to see if your getting power to the ecu :O)




.

 

[millzy]

this may help to see if your getting power to the ecu :O)




.

Cheers mate but im not sure if this is any use to me. I looked for my ECU today and I can see its been replaced with an APEXI full boost controller ecu.

Ive looked every fuse over 100 times and only found the one blown and i've replaced it and still no joy.

Im starting to think that maybe the settings have been erased?

Could this cause the car not to start? The battery had been off for quite a while.

An auto electrician should be coming out to look at it today.

Im praying that he can find the problem because this is starting to get emotional lol.

I noticed was after the commander has loaded up, when I turn the car over it restarts. Is this normal?

I made a video here.

[ame=http://www.youtube.com/watch?v=kOL7BvN_fek]Apexi non starter - YouTube[/ame]

cheers.

 

[evo arm's m7960]

so have you just got a apexi avcr , which controlls just the boost leaving the cars ecu to controll the engine running .

or have you also got a apexi power fc ecu which is a replacment ecu to controll the engine running as well as the avcr to controll the boost ???


either way the ecu wiring should still be the same as shown above :0)

ps , has the immobilizer got any seporate in line fuse's that may have failed ??

.

 

[Simon@NTS]

Cheers mate but im not sure if this is any use to me. I looked for my ECU today and I can see its been replaced with an APEXI full boost controller ecu.

Ive looked every fuse over 100 times and only found the one blown and i've replaced it and still no joy.

Im starting to think that maybe the settings have been erased?

Could this cause the car not to start? The battery had been off for quite a while.

An auto electrician should be coming out to look at it today.

Im praying that he can find the problem because this is starting to get emotional lol.

I noticed was after the commander has loaded up, when I turn the car over it restarts. Is this normal?

I made a video here.

Apexi non starter - YouTube

cheers.

Normal mate

 

[Simon@NTS]

have you checked all the relays?

 

[B6lee]

Normal mate

Yea I'd say normal too


Have you checked the fuses on the actual positive battery terminal ?

 

[millzy]

Hello,

Thanks for the feedback on the controller.

I'm back. I haven't fixed my car and done a runner. Just tied down with work.

Still haven't got her running. After doing some more checks Ive now found the following.

There's no spark
There's no fuel, the plugs were bone dry.

A couple of theory's i now have to rule out before i will have to accept the ECU got fragged.

I was reading that the alt relay protects the ecu against electrical surges and spikes. Now its meant to reset after its done its job but I am guessing with the power i was throwing at it i might have destroyed it.

I checked it with a 12V tester and there's power until it gets the white sealed plastic bit. There's no power at the other side though. Is this normal? Here's a picture of it.

Guessing that if its knackered there will be no power to the ecu, no power to the ecu would mean no fuel or spark.

I've smelled the white plastic part and it stinks like a burnt smell.

Now for the second theory.

Weeks leading up to the tensioner going I was driving on a flooded road. Water splashed up underneath. I lost power for a second then regained it.

After that the car struggled it idle. Every time I stopped at a junction it would stall, If i took my fut off the accelerator i could hear it starting to cut out.

The last time i drove the car home the engine management light come and it conked out. I assumed the battery had just drained as the alternator wasnt grafting.

A minute later i turned it over and away it went again.

Since fitting the belt and possibly blowing up the electrics and it wont start.

Could this possibly be the camshaft sensor on it way out and when the new drive belt was fitted it was finished off? Maybe knocked

I'm running out of ideas now.

 

[millzy]

so have you just got a apexi avcr , which controlls just the boost leaving the cars ecu to controll the engine running .

or have you also got a apexi power fc ecu which is a replacment ecu to controll the engine running as well as the avcr to controll the boost ???


either way the ecu wiring should still be the same as shown above :0)

ps , has the immobilizer got any seporate in line fuse's that may have failed ??

.

Im not 100% if it would have seperate fuses. To deactivate the immobilizer you fully turn the keys in the ignition then hit a button on the fob. There is a click and then the car does its checks and you are able to crank it after.

The mad thing is the car seems normal apart from the fuel and spark.