ECU Problems

[SA33DS]

so lets start this off I have a Astra COnvertible 04 model manual z22se,

My battery ran out, so i decided ill get a new one, bought it and changed the battery, after i changed the battery, the car wouldnt turn on, F***!

i noticed the little orange car with spanner through it was flashing, so knew its ecu. i decided to get a mechanic come have a look he had a look and saw that injectors, throttle body, spark plugs battery everything is fine. and tonight i checked the fuel pump and that was cool too.

now the mechanic said that the ecu is ****ed up somehow when i changed the battery and its not injecting fuel to the engine or something like that. so i decided to take the ecu out and hopefully this is where someone can help me.

firstly and this is embarrasing lol, where is the ECU? i thought it would be in the boot but im wrong as usual.

also after taking it out i want to get it flashed or remapped. and if that doesnt work then replaced.

please any help will be greatly appreciated!!

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[guy 27]

You will find the ecu is in the engine bay.
It is located to the left of the throttle body. If you look in Brads(daiflu) thread you will see a picture of it.

Edit: http://www.opelaus.com/forums/showpo...&postcount=258
The ecu is the thing with all those wires hanging out of it.

[SA33DS]

You will find the ecu is in the engine bay.
It is located to the left of the throttle body. If you look in Brads(daiflu) thread you will see a picture of it.

Edit: http://www.opelaus.com/forums/showpo...&postcount=258
The ecu is the thing with all those wires hanging out of it.

AWESOME!!!

thank you so much!!

now for the flashing/replace

who/where is recommended in sydney?

thanks so much again mate

[Keep'emRunning]

..will it allow the codes to be checked? Ecu wouldn't malfunction simply because of a battery change.

Check if the fuel pump relay is clicking on when turning the ignition key.

[SA33DS]

..will it allow the codes to be checked? Ecu wouldn't malfunction simply because of a battery change.

Check if the fuel pump relay is clicking on when turning the ignition key.

fuel pump sounds fine when the ignition is ticking, the mechanic that came and saw it checked the fuel system and also the intake.

It beats me ..... i did the paper clip test but nothing, maybe because the car wont start up. ....

Ill be taking out the ECU tonight and hoping to take it somewhere tomorrow. Any reccomendations?

[Keep'emRunning]

checked all the fuses, both in engine bay and behind the glove compartment?

Is the battery charged?

[gman]

So the dash lights come on when you turn the key?? Does the engine turn over??

It could be the ECU and the security module have stopped talking. Get the fault codes read "FIRST" before you change the ECU module over as the are very expensive....Around $1200 from Holden...

Easiest way is to get an OBD rear or you can do the "pedal test" to check the ECU MIL light code and then check the data base for what the issue is. The ECU may have been fried if it got a voltage spike somehow.

Check the codes and see what the issue is first....

[SA33DS]

checked all the fuses, both in engine bay and behind the glove compartment?

Is the battery charged?

The battery is brand new
The fuses are all fine

So the dash lights come on when you turn the key?? Does the engine turn over??

It could be the ECU and the security module have stopped talking. Get the fault codes read "FIRST" before you change the ECU module over as the are very expensive....Around $1200 from Holden...

Easiest way is to get an OBD rear or you can do the "pedal test" to check the ECU MIL light code and then check the data base for what the issue is. The ECU may have been fried if it got a voltage spike somehow.

Check the codes and see what the issue is first....

I cant do the test it only flashes continously
Since the car doesn't move, I want to take out the ecu and get it checked out tomorrow, can anyone recommend a workshop that can help me???

Thanks

[gman]

Well that's not so good....You'll prob have to get it done in the car....Even Holden apparently can only read them in the car...You might be able to get Lube mobile or similar to come and try and read the fault code off the car...

However it sounds almost exactly like what happened to my car when the ECU died..I was able to read the ECU a couple of times with a fault code reader then it finally just died and same thing, flashing MIL light...I had to get it towed to Holden to have a new ECU fitted and programmed to match the keys/security module....

[SA33DS]

Well that's not so good....You'll prob have to get it done in the car....Even Holden apparently can only read them in the car...You might be able to get Lube mobile or similar to come and try and read the fault code off the car...

However it sounds almost exactly like what happened to my car when the ECU died..I was able to read the ECU a couple of times with a fault code reader then it finally just died and same thing, flashing MIL light...I had to get it towed to Holden to have a new ECU fitted and programmed to match the keys/security module....

****en aye, how much did it cost you?

yeah with the paper clip test what i did was use a paper clip to short the 2 pins that you are ment to short going from a diagram. then hold the brake and accelerator together and switch to ignition and nothing happens just the light keeps flashing.

Apparently i fried the ecu cos of a voltage overload. I was rushing and put negative lead first then i was like oh **** and took it off then put positive then negative and didnt work.