Tyre Pressure Monitors - Yes, again, must be someone here who knows the answer
Julian Davidson
Any help, much appreciated and yes, I am still trying to save for a GS-911, mainly based on what I have read on this forum.
fdd247
I am living with this problem too. The BMW dealer here was EXTREMELY helpful and attempted to deactivate the TPMS. However, a "device" needed to be plugged into a certain socket which would tell the computer there is no TMPS on the bike. Cant be bothered locating this "device" which appears to be a resistor or something like that, and so am stuck with living with this.
Sorry, GS911 cant help with this. However. when you go for the MOT and you have your GS911, you could stop about 100m from the garage, clear the faults (which will eliminate the yellow triangle) and you will be good for about 500 to 1000 meters before it shows up again. So if the MOT is done without the bike moving, there will be no problem as the yellow triangle will not display.
All the best.
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Julian Davidson
Oky doke, thanks for that and I’ll let you know if I find out anything else, like which socket and what device
From: fdd247
Sent: 25 April 2012 18:13
To: gs-...@googlegroups.com
Subject: Re: [GS-911] Tyre Pressure Monitors - Yes, again, must be
someone here who knows the answer
Hi Julian.
I am living with this problem too. The BMW dealer here was EXTREMELY helpful
and attempted to deactivate the TPMS. However, a "device" needed to
be plugged into a certain socket which would tell the computer there is no TMPS
on the bike. Cant be bothered locating this "device" which appears to
be a resistor or something like that, and so am stuck with living with this.
Sorry, GS911 cant help with this. However. when you go for the MOT and you have
your GS911, you could stop about 100m from the garage, clear the faults (which
will eliminate the yellow triangle) and you will be good for about 500 to 1000
meters before it shows up again. So if the MOT is done without the bike moving,
there will be no problem as the yellow triangle will not display.
All the best.
On Wed, Apr 25, 2012 at 3:57 PM, Julian Davidson wrote:
Just contacted my local BMW Motorcycle dealer (and where I bought my bike) about the tyre pressure monitoring system on my 2008 BMW R1200GS Adventure (something I find invaluable, but wish I had not opted for now) to ask if I can replace the TPM valves with standard valves and whether they could disable the warning system on the dash. I read that this had been done on a service recall in 2006 in America where they had problems with the cross spoke wheels hole where the valve went through, leaking.
They not surprisingly said I shouldn't rely on everything I read on the web and told me that they cant disable the system. They said the only way to do it would be to replace the module that also deals with the alarm and so it would be very expensive. One hundred and forty pounds per tyre sensor, plus VAT and labour isn't exactly cheap either!
I will replace the valve and sensor with a standard valve so I have a bike to ride, but because of the warning light on the dash, it would fail its MOT this year, so its off the road again.
What I'm asking is does anyone know if what the garage told me is right or wrong about disabling the sensors/warning or if anyone has heard of a work around or some way of dealing with the problem that doesn't cost a fortune.
And yes, I know this isn't a strictly GS-911 question,
however most of the posters on here (not all :) are technically minded and do
know what they're talking about as opposed to other places of chat.
Any help, much appreciated and yes, I am still trying to save for a GS-911,
mainly based on what I have read on this forum.
Julian (yes, my real name)
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Marco S Hyman
> Oky doke, thanks for that and I'll let you know if I find out anything else,
> like which socket and what device
Electronic communications busses are typically terminated. Termination
means adding a lump of resistance to soak up the signal at the end
of the bus. Without the terminating resistance the signals see the
end of the bus as a wall and may bounce off the wall, causing possible
interference with the next signal in time.
There is a terminating resistor in the Can BUS connector that would
otherwise plug into the RDC/Alarm module. Actually the terminating
resistor is in the cap that protects the connector when the RDC/Alarm
module isn't installed.
For my '05 GS the part number of that cap is 61 13 7 668 405. It
is ONLY used when the bike has NEITHER RDC nor Alarm. The cap
only insures that signals on the CAN bus aren't messed up. It will
do nothing about firmware that might think that something is supposed
to be there and will bitch if if that something is not found.
Marc
Seth Miller
Julian Davidson
Believe me, I’m very sceptical of my dealer at the best of times.
It strikes me that its more likely that BMW’s electronic systems are programmed to switch on and off, certain optional equipment from the main system than to have different computers for each and every different add-on option. I think it more likely that either BMW have instructed the dealers not to do such (as I have bee told that Honda used to instruct its dealers not to do certain things to their machines, from someone who used to work at a dealer).
I have also read elsewhere that the BMW computer supplied to the dealers is somewhat complicated to understand and I suspect that if not specifically instructed to do so, they probably leave well alone and don’t understand its actual capabilities. First thing I do after purchasing any computer or software is to do just that, explore and understand all of its abilities. Yes, I’d love to get my hands on one of those computers.
Thanks for telling me that the light can be switched off, that is of course exactly what I need and I will approach a different dealer with that proposition.
Julian
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Stephan Thiel
let me start with some basics. On the models such as your bike, RDC control unit sits above the rear wheel. The next point to note is that all the control modules talk and exchange information over the CAN bus (as you're most probably aware), and even more note worthy is that the CAN bus is terminated by 2 resistors on either end. The value of these resistors is 120ohm, and one end-point of the CAN bus is the RDC/DWA connector (the other one if I remember correctly is in the KOMBI (cluster)). Thus, if you do not have a RDC or DWA unit, then there is a little 120ohm resistor in this connector. Now, removing this connector is extremely detrimental to your CAN-bus communication... and you'll be lucky to get ay comms on that bus...
What this boils down to is that you can't just unplug your RDC control unit or else you won't get any other communication on the CAN bus.... and your engine and cluster won't know the vehicle and wheel speed and the nor the fuel level from the ZFE etc... (in short - you don't want to (and shouldn't) do that!)
The warning light (yellow triangle) is on your instrument cluster and and cannot be switched off... it is used for several other warnings too... If (in your case) the RDC unit finds a fault worthy of lighting the Warning triangle, it will send a message over the CAN bus to switch on the Warning Triangle...
now, thinking about this, there is something you can try... (but not tested or evaluated by myself):
Once you have the bike in normal working order - no fault codes etc... I would unplug the RDC unit and plug the corresponding termination plug into the harness (that includes the 120ohm termination resistor, to make the CAN bus function correctly). Now, you don't have the Waring triangle ON, and you no longer have the RDC unit that can send the message to light up the warning triangle for the RDC issue... (however the Warning Triangle has NOT been disabled and can still be switched ON by any of the other control units, should they need to!)
Your Dealer is actually correct, in terms that the correct way to "get rid" of this is to uninstall the RDC control unit.. this means removing the unit, replacing the termination plug AND unlearning (actually un-coding) the RDC unit from the Vehicle Order... (the other units are programmed to know what control units are fitted to the bike, and if you don't do this, I'm pretty sure some of the other control units will log a fault code in their respective Fault Memories, something to the tune of "CAN bus error - cannot communicate with RDC/DWA control unit". However these faults are not rated at the same severity and should not light up your Warning triangle!
The termination resistor/plug for your 2008 GS is: 61137668405 and should cost around $8.50
Let us know what you find!
best,
Stephan
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Nigel Taplin
Some time back there was mention of coding new trye pressure sensors using the GS911.
Was this in the development stage or can this only be done by a BMW Dealer?
As I understand the sensor is battery powered and the whole sensor has to be replaced, or has someone found a way of getting the batteries out to replace??
Regards
Nige
Date: Fri, 27 Apr 2012 13:53:56 +0200
From: ste...@hex.co.za
To: gs-...@googlegroups.com
Subject: Re: [GS-911] Tyre Pressure Monitors - Yes, again, must be someone here who knows the answer
fdd247
Thanks for your elaborations!!
I probably will go this route of getting the resistor and all.
One question though....since you mentioned that the CAN bus runs through the RDC, does the RDC, itself, terminate the CAN bus? Can one take out the RDC and just get a 120ohm resistor and connect on the line...assuming one is also able to do the adequate coding at an "understanding" dealer?
Stephan Thiel
both ends... the one resistor is in the Instrument Cluster... the other
one is in the RDC/Alarm unit itself, or if no ECU is fitted, then in the
connector CAP that we supplied you the part number of in a previous post.
best,
Stephan
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