Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: vincedomingo on 14 May 2007, 11:19:01

Title: 2.2 petrol auto,2002 Drive by wire limp mode
Post by: vincedomingo on 14 May 2007, 11:19:01

Hi back to my unsolved problem! ( Omega stuck in limp mode runs at only 1200rpm, no throtttle response)
I've now had a measure of the throttle body using ohm meter. It has two pots, they read ok according to my Autodata manual. The servo motor resistance reads low (2.4ohm not 3.8), The butterfly valve seems a bit jerky when I gently push it.

Status
1 \Breathers cleaned ( no problem seen)
2 Throttle body cleaned (small hole blocked , now unblocked)
3 ECU code reports ETS problem (Electronic throttle system)
4 I've not checked the signals from the throttle pedal which is candidate but it has two pots that would need to fail so I'm not convinced it could be that but I am going to do next if I can find the connections.....

I've researched a bit ETS. There are several limp modes for this if it detects a failure. http://www.autospeed.com/cms/A_108379/article.html this is a very good link for Bosch Motronic ETS and I appear to be seeing Emegency mode three which  cuts off the throttle body and limits the engine to 1200rpm if it gets confusing inputs from the throttle body.

So unless anyone has better advice (!) I'm going to buy a second hand throttle body and try that, and check out the pots on the throttle pedal while I wait for it.

If I bought an ECU reader what type would I need ( I have a laptop)

Vincedomingo

Title: Re: 2.2 petrol auto,2002 Drive by wire limp mode
Post by: Martin_1962 on 14 May 2007, 12:54:31

Make sure the lead is plugged into the TB properly, this is the exact symptoms of this

Title: Re: 2.2 petrol auto,2002 Drive by wire limp mode
Post by: Markjay on 14 May 2007, 12:58:45

Quote

...If I bought an ECU reader what type would I need ( I have a laptop)..

Same as mine, i.e. 'Chepo Tech 2', which is around £30 off eBay - Auto Addict has one and it works with his 2.2 DBW.

Make sure your laptop has a real old-fashioned RS232 Seial Port - the USB to Serial adapters don't work very well with this device....

Title: Re: 2.2 petrol auto,2002 Drive by wire limp mode
Post by: Marks DTM Calib on 14 May 2007, 16:35:38

And for info......this is how much they are new!

http://cgi.ebay.co.uk/VAUXHALL-ASTRA-CORSA-OMEGA-VECTRA-ZAFIRA-THROTTLE-BODY_W0QQitemZ150107560392QQihZ005QQcategoryZ10404QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

Plus it gives you a listing of what engines its used on to assist in sourcing one.