Gear Shift Assist has stopped working

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Goldbug101
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Gear Shift Assist has stopped working

Postby Goldbug101 » Fri Mar 30, 2018 3:33 pm

Hi all.

Got my 2015 R1200RT LC LE out yesterday for the first time since last October, apart from a brief excursion for its first MoT in January. It's always on a Ctek MX-5 maintenance charger so the battery is sweet and I run a dehumidifier in the garage to keep corrosion at bay.

Anyway, it quickly became apparent that the gear shift assist (GSA) had stopped working. Quite possibly attributable, in part at least, to the bike having been idle for five months, but the engine started first go and GSA was working at MoT time in January. What's more, the engine is brand new, having done only 2,400 miles since being replaced under warranty by BMW due to corrosion of the lacquer coating (swingarm too).

I rang my local dealer, Lind Motorrad, Norwich, when I got back. They asked me if the battery had gone flat at any point. Turns out the ECU can unlearn the gear position data from the GSA unit after a power failure. I said not. I was advised that Lind can carry out a re-learn when the bike goes in for a service in a couple of weeks' time. Apparently I could do this myself, too, although it sounded a bit of a faff.

Anyone tried it?

Of course, it may be that the GSA unit has failed. I can say that there is *no* way to push up and down the gears without clutching if GSA isn't working, but otherwise the bike worked fine as a normal, clutch-operated gearbox machine.

By no means the end of the world, but you do get used to GSA, especially going up the gears and you don't expect such problems from a premium marque like BMW either, although we've all become used to the many stories from owners that have called quality and reliability into question in recent years.

Your thoughts and suggestions welcomed.

Thanks

GB
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

gogs01
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Re: Gear Shift Assist has stopped working

Postby gogs01 » Fri Mar 30, 2018 9:54 pm

Sorry to hear you're having issues with your GSA.
I can't help, but I'm interested in hearing how you get on. My GSA works satisfactorily, but I believe it could be better. I wonder if the re-learning process can change the timing of the "pause" which allows the gears to change up. I know that if the pause is too quick the gears won't be able to change, but mine feels as if it might be a little too long, which causes a slight jolt at every up-shift. The bike's going in to the dealer for a 12000 mile service on Tuesday, so I'm going to ask if they can check the "timing". I'm not overly optimistic, and I can live with it if I have to, but nothing ventured nothing gained .....
Current BMW : 2017MY R1200RT LE in Platinum Bronze :smile:
Previous BMWs : R1200RT SE (2007 then 2010), R1200RT 90th Anniversary model (2013). :smile:

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Goldbug101
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Posts: 369
Joined: Thu Jun 11, 2015 5:46 pm
Country of Residence: UK
Location: North Norfolk, UK

Re: Gear Shift Assist has stopped working

Postby Goldbug101 » Fri Mar 30, 2018 9:57 pm

Sorry to hear you're having issues with your GSA.
I can't help, but I'm interested in hearing how you get on. My GSA works satisfactorily, but I believe it could be better. I wonder if the re-learning process can change the timing of the "pause" which allows the gears to change up. I know that if the pause is too quick the gears won't be able to change, but mine feels as if it might be a little too long, which causes a slight jolt at every up-shift. The bike's going in to the dealer for a 12000 mile service on Tuesday, so I'm going to ask if they can check the "timing". I'm not overly optimistic, and I can live with it if I have to, but nothing ventured nothing gained .....
I will keep you posted.

I read elsewhere that the engine is actually stopped for a split second as you shift using GSA. Sounds very unlikely, but who knows?
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

Rasputin
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Re: Gear Shift Assist has stopped working

Postby Rasputin » Sat Mar 31, 2018 3:02 am

sounds about right...quickshifters usually interrupt the sparks or fuel to unload the gearbox so in effect they do stop the engine for a brief time ☺
Bmw R1100RT
Harley FXDWGI
Kwak GPZ900RR
Kwak GPZ1100E
Kwak LTD

gogs01
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Country of Residence: Scotland
Location: Dundee, Tayside.

Re: Gear Shift Assist has stopped working

Postby gogs01 » Sat Mar 31, 2018 9:15 am

I used the word "pause" rather than "stop" because the engine only has to slow momentarily to unload one gear and allow engagement of the next before going back to driving the bike forward again.
On previous bikes, without GSA, changing up without the clutch could be achieved by pre-loading the gear lever (it won't change up under load) then quickly closing and opening the throttle to allow the change to happen. It all happens in milliseconds and can also be achieved by flicking the kill switch while leaving the throttle open. This may have the added "benefit" of a flash from fuel burnt in the silencer !
Current BMW : 2017MY R1200RT LE in Platinum Bronze :smile:
Previous BMWs : R1200RT SE (2007 then 2010), R1200RT 90th Anniversary model (2013). :smile:

andys
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Re: Gear Shift Assist has stopped working

Postby andys » Sat Apr 14, 2018 6:20 pm

I rang my local dealer, Lind Motorrad, Norwich, when I got back. They asked me if the battery had gone flat at any point. Turns out the ECU can unlearn the gear position data from the GSA unit after a power failure.
Gulp
Something to consider when you have to change the battery
:shock:

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Goldbug101
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Joined: Thu Jun 11, 2015 5:46 pm
Country of Residence: UK
Location: North Norfolk, UK

Re: Gear Shift Assist has stopped working

Postby Goldbug101 » Sat Apr 14, 2018 6:26 pm

Well, it turned out to be nothing to do with the battery state. The GSA unit had failed. I got my money's worth from my Motorrad extended warranty that day, I can tell you, as a new GSA unit is £400 plus £100 to fit and re-learn. I had to pay a £100 excess on the policy, so I suppose I got off lightly-ish as the warranty cost £400, which includes UK and Europe breakdown cover.

Should the GSA unit fail after 49k miles? Probably not, but the gear shift is a very busy place, so maybe it's not that surprising.

Oh, and I have disconnected the battery several times to fit charger and heated gloves flyleads and all I ever have to do is reset the clock.
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

gogs01
Club Member 13
Posts: 1243
Joined: Wed Oct 13, 2010 7:51 am
Country of Residence: Scotland
Location: Dundee, Tayside.

Re: Gear Shift Assist has stopped working

Postby gogs01 » Sat Apr 14, 2018 9:21 pm

Glad you got it sorted.
I mentioned my GSA "issue" when I took my bike in for it's 12k service. I was told they "reset the values". On the short ride home I could believe there was an improvement, but the gear change was never really bad so it was hard to be sure. I've a few hundred miles to do on Monday / Tuesday, so I'll have a better idea after that.
Current BMW : 2017MY R1200RT LE in Platinum Bronze :smile:
Previous BMWs : R1200RT SE (2007 then 2010), R1200RT 90th Anniversary model (2013). :smile:


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