Locate Idle Air Control Motor

[neddub]

Hi all, i'm a newb to the site but looked through the faq's and there is LOADS of useful info...

I've just bought a R reg 1.4 16v Corsa GLS which needs some TLC. It stalls when arriving at junctions and after some research decided it could be the ICV motor. I followed the paperclip trick instructions and it showed the following flashes :

10_5_10_10_10_5_10_10_10_5_10_10

I read this as a 0500 Idle speed stepper motor/idle air regulator n/a fault, which confirmed my suspicions... I looked at the ICV thread (http://forums.corsa-b.co.uk/viewtopic.php?f=105&t=13412) but my engine bay looks nothing like the pics!




Please could someone tell me
a) have I made the right diagnosis
b) where is the ICV in my engine!!

thanks in advance...

[neddub]

Bump! Please help - just a quick pointer please! I cannot see the MAF sensor, throttle assembly or ICV under my bonnet!!! I'm either blind or dumb so help out an idiot this christmas!!!

[PRICER]

hi,
the reason your engine looks nothing like that topic thread is beause they are different engines. that one seems to be either a 1l 12v or a 1.2 16v, these are different to every other engine in the corsa b range as they are chain driven not belt driven. any'who i have modified your picture, the air flow sensor on these 1.4 16v engines is only about the size of your thumb which in the photo is number 1. this is different to a air flow meter found on the 2.0 16v engines for instance as they are a full cartridge type where as this isnt. and the throttle body and throttle position sensor in down in the depths of the engine where i have put number two. you'l have to do a bit of fishing around and removing the battery to gain a bit of space but it is down there somewhere. these 1.4 16v engines are pigs to work on as i have one and i know hope this helps and more help needed please post a thread and i/we will try to help as much as possible

[neddub]

Hi Pricer, thanks very much for the info! That airflow sensor looked a bit dodgy as it had insulation tape all over it. I'll check it out. Does my engine have an Inlet Control Valve? Thats what comes up on the ECU fault log...

[PRICER]

urrrrrm theirs some small vacume controlled valve in the air box but apart from that its your throttle body. just make sure that all your vacume hoses for your sensors are pluged in and the wires are attatched. i had a problem with mine after i installed my power box that it would stall when you were stood still and found out that because i used thin pipe when it got walm and the vacume inside the pipe caused the pipe to colapse on itself so the sensor wasnt recieving any readings, after i repaired this i never had any problems with it.

[neddub]

Found it! (with a little help from Haynes.... )



The Idle Air Control Motor is basically under the coolant expansion tank on my 1.4 16v DOHC multipoint engine. These are the steps I followed :

- depressurised the fuel system by taking out the relay in the drivers footwell and running the engine for 5 secs
- removed battery
- drained some coolant and removed expansion tank
- removed fuel line from pressure regulator
- removed IAC motor....

The last bit was VERY difficult as the motor is held on with two torx bolts, one of which you can't even see, let alone have much access to...

Here is a view from over the left wheel looking behind the inlet manifold. The mounting for the motor is circled with the motor removed.



The valve was pretty lagged with muck.

Does anyone know if I can test the motor when its not attached? I'm guessing that if the ECU was not getting a reading it must be burnt out, but I don't want to replace it if it just needs a good clean. Trouble is it is too much effort to put it back, test and then do all over again if it still doesn't work! Any suggestions gratefully recieved....