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Corsa automatic (W reg) transmission problems!

Discussion in 'Astra, Corsa, Zafira, Meriva, Adam, Agila, Tigra & Nova [Includes AstraVan & ComboVan] owners forum' started by Somner, Apr 12, 2008.

  1. Somner

    Somner Member

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    Location:
    Warwickshire, UK
    Vauxhall Corsa Club 1.2 16v automatic 2000 W reg

    I've recently got my [girlfriend's] Corsa back on the road but am finding it very slow to accelerate from stationary. When the car is in D (Drive), acceleration from stationary is very slow, however if I put it into 1 then it accelerates a lot better. It has been suggested that this is because when the car is in D it moves from 1st to 2nd gear pretty quickly, and obviously when in 1 it stays in 1st gear only. Whilst this makes sense, I know for a fact that in the past it has moved much quicker when in D. The car has been off the road for about 2 years, but I have driven it around a private piece of land in the this time, a few times, and it's always moved pretty quickly.

    I read that this could be down to the automatic transmission fluid being either low, or bad. I checked the fluid, and sure enough it was bad, although there was enough there. I drained the fluid and filled up with brand new Dexron II. This made a tiny improvement, but nothing useful really.

    However, I've noticed another problem. The snowflake and Sport button's do not seem to work. I'm not sure whether the snowflake should light up when in use, or a light should appear on the dashboard - but neither happens. Nor is there any indication that the Sport button is active when pressed. I decided to check the fuses, and sure enough, Fuse 2 and Fuse 5 are both blown - both of which are for the automatic transmission. I have since changed them both, but Fuse 2 blew immediately the second that I put it in, and Fuse 5 blew as soon as I put the key in the ignition.

    I've looked at the Fuse diagrams in my Haynes manual and by the looks of it:

    Fuse 2 - Runs between the 'Automatic transmission control unit' and the Battery. This would explain why it blew the second I put it in, even without the keys in the ignition. It seems to bypass the ignition but is indirectly linked to it (splice or solder joint)

    Fuse 5 - Runs between the Ignition (explains why it didn't blow until I had put the key in) and the 'Selector lever'

    Looks to me like this is probably the cause of at least the Sport/Snow buttons not working.

    There are no lights lit on the dashboard, well except for when the key is in, electrics are on, but engine isn't on - but this is normal right? When I started the engine, the only light that stays on is the handbrake light, which goes off when I take the handbrake off, of course.. I have no handbook for the car, that is why I bought a Haynes manual, but obviously being a repair/service manual it wouldn't explain the dashboard lights I guess.

    Can anybody help or at least shed some light on what is going on?

    Thanks.
  2. Ruperts Trooper

    Ruperts Trooper Geriatric petrol-head

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    Location:
    Tamworth
    The Sport light should be flashing - you have a gearbox fault !!

    It's gone into limp mode so you need to get the fault code(s) read.

    I'm surprised you could still buy Dexron 2 - it needs Dexron 3 or higher.
  3. Somner

    Somner Member

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    Location:
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    Somebody else mentioned limp mode. How can I tell that it's in limp mode? It seems to drive fine once it's actually going?

    Why are you surprised I could buy Dexron 2? According to the Haynes manual that is what is needed for my car, I didn't have a problem getting hold of it. Also, I've been in Halfords today and they had plenty in there..
  4. Ruperts Trooper

    Ruperts Trooper Geriatric petrol-head

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    In limp mode, the gear is selected by the gearlever ie put in D and you get 4th which is why it's so sluggish.

    Haynes may well be incorrect - the Aisin-Warner autoboxes of that era, used by GM needed Dexron 3 which itself is now obsolete, Dexron 6 is the latest specification - each one better than the last and backward compatible.
  5. Somner

    Somner Member

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    Location:
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    Should there not be a warning light or something to warn me that the car is in limp mode? What you say makes sense however, would it be safe in the meantime to changes the gears manually, including using D as 4?

    Any idea how much a diagnosis usually costs? Any idea what could have caused the car to go into limp mode? The battery has been changed and also has discharged a couple of times (both old and new batteries) due to the car lieing dormant.

    Would using Dexron 3, or even 6 make any real difference? Am I likely to be causing damage or under-effeciency by using Dexron 2?
  6. mike_r

    mike_r VxON Club Member VxON Club Member

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    Location:
    Cwmbran
    Drives:
    Corsa D - Design 1.4 16v Auto
    Vauxhall will charge you around £50-60 quid for plugging it into their tech 2 to read the codes as far as i'm aware, independant garages may able to read them cheaper for you. I don't know much about it myself but its what i've heard!

    There are code readers you can buy yourself should anything like this happen again to save expensive trips to the garage, again someone else would probably be better at giving advice on this :ROFLMAO:.
  7. Somner

    Somner Member

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    Location:
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    Any idea why I'm getting no warning light if the car is in limp mode?
  8. Ruperts Trooper

    Ruperts Trooper Geriatric petrol-head

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    The Sport light should be flashing if a fault is detected which puts it into limp mode - I can't explain why it wasn't. Changing gears manually won't do any harm in itself but remember there is a fault there somewhere and continued driving may not be helping. When you got any fault codes that may give a clue.

    A W-reg Vauxhall won't be EOBD/OBD2 compliant. I use the Gendan PC-based VauxCheck which covers Vauxhalls from '96 - '03 and will reset codes. There are cheaper code readers.

    Reading codes is £50+ at Vauxhall dealers, £20+ at good independents.

    Dexron 2 has to be better than "bad" fluid but should use 3 or 6 next time.
  9. Somner

    Somner Member

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    Location:
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    Look like I'm going to have part with some cash then, bloody thing. :p

    Don't get paid until the 24th so we'll have to put up with it until then. Fortunately I'm a learner so I only go out once every other day for an hour or two and the roads are always quiet.
  10. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

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    Location:
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    Does the S light come on when you turn the key in the ignition, but not start the engine? If not, then that is why you're not getting a warning light when it's in limp mode as the bulb has blown (or been taken out by a previous owner because of the fault). It should come on with the ignition as a check light.

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