Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: TheBoy on 31 December 2007, 18:46:31
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2002 2.6
Cruise fully works with the following exception:
Using the resume function, any more than the quickest tap, and it just sets cruise at the current speed.
Dealer alledgedly changed stalk and engine ecu.
Any ideas?
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cant see how that could be anything other than the ecu or programming...
Are there various levels of software for cruise control?
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cant see how that could be anything other than the ecu or programming...
Are there various levels of software for cruise control?
Only software is the main engine ecu software. I had made a dangerous assumption that dealer would have put latest on. I was unable to check, as I didn't have the laptop with me
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Any ideas?
If I didn't know that the dealer had changed the stalk :-X the stalk would be where I checked first. Does each press of each button open/close contacts within it?
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Any ideas?
If I didn't know that the dealer had changed the stalk :-X the stalk would be where I checked first. Does each press of each button open/close contacts within it?
Only checked with tech2, and can see switches working as expected from engine ecu
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Only checked with tech2, and can see switches working as expected from engine ecu
That's me f***ed then! :( :y
Perhaps it needs a new ECU!! ;D ;D ;D
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Only checked with tech2, and can see switches working as expected from engine ecu
That's me f***ed then! :( :y
Perhaps it needs a new ECU!! ;D ;D ;D
My gut reaction is a software issue or an ecu failure, though it has alledgedly be changed...
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Only checked with tech2, and can see switches working as expected from engine ecu
That's me f***ed then! :( :y
Perhaps it needs a new ECU!! ;D ;D ;D
My gut reaction is a software issue or an ecu failure, though it has alledgedly be changed...
A dealers word is reliable as a plumers estimate
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I don't know cars but i do know software/hardware hence what i think, backed up by TheBoy, which i'm quite chuffed about ;D
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Initial reaction was that the stalk is knackered and 2 buttons are reacting at once, but that's been covered.
If the Tech 2 can see the buttons OK, and the car runs OK without cruise I think the hardware checks out OK. After all, the cruise control is just software plus a couple of buttons on a DBW engine.
I'd say it's an ECU configuration issue or a "glitch". Reflashing the firmware, even if it's the same, might help.
I guess it could be giving up during the "resume" due to insufficient response from opening the throttle or due to a problem with the DBW throttle but I'd expect codes to be stored and problems driving manually as well!
An odd one....
Kevin
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Haver an idea about this but before i post and make a pratt of meself how does the cruise get its signal from the engine is it taken from the coil pack or speedo or something else?
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Haver an idea about this but before i post and make a pratt of meself how does the cruise get its signal from the engine is it taken from the coil pack or speedo or something else?
Cruise is built into the engine ECU on a DBW car, so it operates the throttle through the DBW actuator in exactly the same way as manual driving with the accelerator does. I assume the vehicle speed is fed back into the engine ECU from the ABS system. Looks like a CAN bus linking it, the engine ECU and auto gearbox, if present, from the wiring diagrams.
It's really hard to see a failure that would give these strange symptoms. :-/
Kevin
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arnt the dbw got resistors in the stalk ?? ;)
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arnt the dbw got resistors in the stalk ?? ;)
Nope, only BMW diesel
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Haver an idea about this but before i post and make a pratt of meself how does the cruise get its signal from the engine is it taken from the coil pack or speedo or something else?
Its Mike's 2.6, only just got around to posting about it :-[
My initial thought was some fault with the electronics and any debounce circuitry around the ecu that deals with resume button, but Mike says the dealer has replaced ECU.
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Hmmm.....interesting one.
I would certainly check and update the software (there was an update for the 3.2 which was cruise related) as a starter.
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Hmmm.....interesting one.
I would certainly check and update the software (there was an update for the 3.2 which was cruise related) as a starter.
Yes, I meant to last time I saw the guy. Took the tech2 and the laptop. Shame I had rebuilt laptop that week, and not reinstalled TIS :-[
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Haver an idea about this but before i post and make a pratt of meself how does the cruise get its signal from the engine is it taken from the coil pack or speedo or something else?
Its Mike's 2.6, only just got around to posting about it :-[
My initial thought was some fault with the electronics and any debounce circuitry around the ecu that deals with resume button, but Mike says the dealer has replaced ECU.
Any debouncing will almost certainly be done in firmware. It's so trivial to detect a button press and then go into a state where you ignore further button presses for a few milliseconds. I would be surprised if the cruise button inputs did any more than go straight into an input on the microcontroller - with some protection circuitry in between.
If the buttons can be observed to operate correctly with Tech 2 I think they're in the clear. The one thing I was thinking is that the "set / accelerate" button is closing at the same time due to a failed stalk and the ECU is seeing that button before the "resume" button.
I also wonder if the "resume" functionality can be turned off for some markets - maybe someone objects to cars which have a button that can cause them to accelerate off on their own?
Then again, why does it work at all after a short tap on the button? :-/
Kevin
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I have just tried my 2.6, its behaviour is similar, brief touch resumes, longer press sets current speed.
Daft thing is I never really noticed it before, I driven more than 100,000 miles in it and use the CC all the time.
Perhaps this is normal?
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Will have to give it a try in my 3.2. I certainly haven't ever noticed it NOT resuming when wanted. I do normally accelerate manually though.
Kevin
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Sounds like the same with mine just a quick tap and longer and it will set to the new speed. I can not recall if it was the same on may old 30 elite which was not a DBW.
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Out of interest I found in the manual on page 157, right hand column, some wording which could be interpreted to make this normal.
It's a bit long winded for my typing abilities.
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So it appears to be normal for DBW units? This one, any more than the briefest taps results in setting to current speed. I'd be interested in the wording from that manual...
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Let me know your email address and I will attempt to scan and send it tomorrow.
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Let me know your email address and I will attempt to scan and send it tomorrow.
pm sent
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ignore that - obviously I have the pdf manuals for facelifts!
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Oh, BTW, tried this on the way home from work. A tap on the button resumes. A longer press (say 0.5 second) sets to current speed.
Kevin
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Oh, BTW, tried this on the way home from work. A tap on the button resumes. A longer press (say 0.5 second) sets to current speed.
Kevin
Thanks KW, that is what this guy is getting.