Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: feeutfo on 14 March 2009, 19:02:04
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snap on reader gives 2nd to 3rd gear solenoid
and incorrect shift pattern
flashing arrow and engine light comes on after about half hour of driving, this envolves clonky and slow changes and always misses 3rd, it either takes ages to go in or the car slows so much it goes back down to second again, all other gears do select, drive is slow to engage.
changed atf no change in symptoms, selector switch is 80 quid and easy to get to so i thought i would start there as ive seen posts that it doesnt like sitting for long periods, which it has done. Ratcheting the selector makes the arrow light go away, which means incorrect shift pattern.
see pics below any thoughts? tracks seem ok contacts on other half
have some wear but nothing massive
(http://i344.photobucket.com/albums/p326/chrisgixer/14032009482.jpg)(http://i344.photobucket.com/albums/p326/chrisgixer/14032009485.jpg)[img]
any thoughts much apreciated
Cheers
Chris :)
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I thought Volvo Auto boxes had a sealed for life warranty :-/
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Hi Chris.
My Volvo man is in Aus at the moment so no help. But I could ask some lesser types on monday for there thoughts.
I wouldnt expect to much help from the warranty side of things but after last time you already know that.
Iain
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thanks guys, would be nice if it was under warranty but i wont hold my breath. :(
Volvo seem ok on prices so far though...ish?
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any more thoughts no this guys. I dont see alot wrong in all honesty. The raised tracks all bell out to various pins and they dont seem that worn down. The metal contacts have some wear, but nothing major. I was considering grinding a face on them to take out any wear groves, there seems to be plenty of tension in the springs to take the shallower depth that will result. But that will mean removing all the chrome finish on them?
On the face of it 78 sobs for a new one looks like a bit of a waiste of money.
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Depends which box it is, they did use the same really shite unit as Renault were fitting!
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Depends which box it is, they did use the same really shite unit as Renault were fitting!
My Dad is going to be really happy to know that. ;D
Had Espace, gearbox went bang (amongst other things, of course), chopped it in for a V70. ::)
Kevin
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knowing nothing about these gearboxs at all,it just strikes me that if the scanner is complaining about the 2-3 solenoid why don't you just change it ?.the incorrect gear pattern is probably the same thing ie fubared solenoid.
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Its an Aisin warmer box, dont know exactly which one at this stage.
Looking at selector switch as "ratcheting" the selector gear lever back and forth turns off the flashing low gear indicator arrow, which comes on just before limp mode and the engine light comes no. See here,http://volvoforums.com/forum/showthread.php?t=985
The selector switch is £78. A solenoid is £150. Both from volvo.
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i would go to a auto tranny place for solenoids, not volvo. jpat for example
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give us the year,model, regd etc by pm if you prefer and ill ask my local parts supplier
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The ECU is likely to be directly driving the solenoid (based on inputs from the selector, of course, but it won't be in the circuit to the solenoid) so Sassanach makes a valid point. For a solenoid fault code to have arisen, it's unlikely to be anything other than the solenoid or its' connection to the ECU.
I'd get an ohmmeter out and buzz out the circuit before getting a new solenoid though.
Kevin
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changed the selector switch this evening, as this http://volvospeed.com/Repair/pnpswitch.htm
It now selects better smoother and quicker, but the box was cold, didnt get much heat in it, will give it ar run in the morning.
3rd is still not engaging as it should.
So sounds like 2 issues and the solenoid issue still remains, no suprise there by the sound of it.
Codes where
1618 manufacturer specific.
0785 2nd to 3rd gear shift solenoid
Codes are accurate from a snap on reader before the switch was changed, not quite so sure on the descriptions. Volvo diagnostic would give more info no doubt, but we may as well give them the car as payment by the time theyve finished.
Sassanach has given me some homework, he needs to know if its 4 or 5 speed box, (er, both at the moment?) fairly sure its supposed to be a 5 speed but will ring volvo in the morning and see what they say and get the codes cleared again.
Thanks for input so far, much appreciated :-)
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box is AW 55-50-51SN
and is a 5speed
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Shows how shite the snap-on reader is then if it does not incldue the manufacturer specific codes.
Of course, what we dont know is the detail behind the codes, we also dont know how the gearbox arrives at the decision that the solenoid is an issue.
It may simply be activating the solenoid and not seeing the output speed change with respect to input revs. It may be looking at the resistance (un-likely) or monitoring the solenoid wires for open circuit volts etc (possible)
Now, the Renault boxes (if one and the same) have big issues with the valve blocks.....that and to many plastic internals!
So, without the real code detail and the unknow code have any meaning, its a bit to much guess work.
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I hear what your saying, but from my experience it depends how much access your particular marque want you to have without the genuine reader. For instance the snap on appears to give far more in depth access to vag and Bmw cars, various live data streams are possible. Volvo though wont play.
You get fault codes and drive train iirc and thats your lot. Also seen stuff on net describing difficult access to various "deeper in" ecu's. In other words they have deliberatly made diagnosis difficult for non volvo readers/scanners. The bosch tool is the same.... All in my limited experience of course.
I really feel for small independents re this. They cant possibly acquire all genuine readers. And no generic reader is fully up to the job. A good reason to specialise in one make imho.
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Quite clearly the case, not conviced on the 'difficult' bit, its probably more down to the lack of demand (Volvo for example being a small selling mrque with falling sales and dealerships)
Anyway, not surprised the selector switch did bugger all, how could it, its not dynamicaly moving as you drive and the gears shift.
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ps jpat say the solenoids are not available seperately from the valve body, which is £900.
However volvo have the seperate parts on their system.
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Something to start with
http://sonnax.com/tech-articles/TASC-TIP-02-08.pdf
http://www.fixya.com/tags/automatic_gearbox
http://cobratransmission.blogspot.com/2008/12/aw55-50sn-valve-body.html
http://www.omegamachine.com/html/Volvo-AW-55-50-SN-planetary-repair-bushing.htm (you can ask them about your problem)
http://www.trnw.net/
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Good work, thankyou Mkaminski. :-) that will come in handy when the valve body comes off. Local garage has a bench tester for the valves body apparently.
They also had a contact near me that with a genuine volvo reader which gave no more info except 0100 poor shift quality, this suggested to clean and check the connections that connect the connector switch to the loom to ecu. Ran out of time after cleaning the
multiplugs with switch cleaner. This will need further
examination obviously before we examine the valve body.
Further thoughts invited if any.
Cheers
Chris.
Ps just seen this exact same box bolted to a 2.2 52plate vectra. Which is quite worrying as my father in law has just acquired a 1.9 auto vectra to replace the above Volvo.
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Is it 3D transmission where you will check solenoids/valve body? It's good to know any auto service around.
...The 55 50/51 SN is installed in a multitude
of vehicles, and there will be variations to
the unit and this data. A similar valve body will
bolt to a GM, Volvo, Saturn, Nissan, Saab, Opel
or Renault. Failure to test and recognize the differences
among them can create hours of additional
effort...