low battery on tps

[da_boom]

computer says rear wheel has low battery? goes away after a while. how do you replace battery?

late 08 model

[Manny]

I think its just below the valve, but you have to take the tyre off to change it.

[Kwikasfuki]

The TPS giving a low battery warning is a common fault. The battery is supposed to last five years and I don't believe you can replace the battery standalone. The whole unit needs to be replaced and sync'd with the ECU which only a dealer can do.

The good news is that its covered by warranty so shouldn't cost you anything.

[da_boom]

dealers going to replace both front and rear.

thnx

[frenchbiker]

You cannot change the battery, you have to replace the all sensors. Even when replaced do not be alarmed if it shows the message "low battery" in cold weather, it should be back to normal once tires have heated up.

[Rawman]

+1 to above, it is a tab-welded CR2032 that is soldered to the circuit board inside the TPS.  They make it that way because the forces inside a rotating tire would be beyond any replaceable battery configuration.  Sucks, but kind of makes sense.
 

[frenchbiker]

When I wrote you cannot change the batteries, this is going by the book. Some of my buddies in the US have replaced the battery but their soldering skills are excellent, for myself I follow Kawa's instructions and replaced the whole sensors.

[Kwikasfuki]

Surprised they don't use a dyno concept to power the TPS.

[da_boom]

When they went on my old model I quickly realised what a pain in the butt these are going to be when they do fail. In the first instance the battery can't be replaced. Secondly, there are no third party versions so you're forced to go to the dealer. Even if there were third party ones available, you'd still have to go to the dealer to get them mapped to the the ECU.

The dealer wins unless someone can figure out how to replace the battery.

[Kwikasfuki]

I just had my front TPS replaced under warranty. Low battery error in cold weather.

[mark.fozz]

Mines doing the same !!!!! front tyre low battery !!! Its only a cr2032 keyfob battery so i have Araldited a piece of wire either side of the new battery left it overnight to set solid , just checked voltage with a meter which was 3.2 volts at the end of the wires so no poor connection and i am going to solder it to the circuit board leaving the existing battery in place (in series) and i am going to to secure this to the tps with a few cable ties !!! let you know how i get on soon guys!! ;)

[2kwacks]

The TPS giving a low battery warning is a common fault. The battery is supposed to last five years and I don't believe you can replace the battery standalone. The whole unit needs to be replaced and sync'd with the ECU which only a dealer can do.

The good news is that its covered by warranty so shouldn't cost you anything.

surely they would only be coverd with-in the standard 2 year warranty! not for the 5 years there suppose to last!

[mark.fozz]

 :) well today when fitting my new tyre i took apart the TPS and managed to pry off the old 2032 battery and resolder a new one in place  ;D Only problem i had was i had to really sand down the new battery to make sure the solder would stick to it and also soldering it in the right position !!! put it all back together and works within about 50 foot !!! well impressed as i went to the dealers and the sensor was about £190 and then fitting and coding to the bikes ECU !!!!!! So it pays to have a go because at the end of the day it was knackered anyway  ;D

[Kwikasfuki]

I'd be interested in how you did that. Did you take any pics?

[mark.fozz]

Unfortunately i didnt take any pictures but it wasnt that difficult. The TPS was removed using a 5mm allen key and theres a little t5 (i think) torx screw hidden under a sticker on the sensor which you remove and the casing of the TPS just pries apart .I just used a very small flat bladed screwdriver to break the 2 small spot welds on either side of the battery and cleaned the 2 prongs with emery paper . With the old battery removed i tried solder on these terminals which stuck very well !! So i roughed up the new CR2032 battery both sides using the emery cloth again and applied 2 small blobs of solder to the battery which stuck aswell  ;) . So after aligning the battery in roughly the right position i soldered it on . You have to make sure that its in the right position because you have to make sure it fits again into the the little plastic box it came out of ( took me 3 attempts) :P
And low and behold it works fine !!!!!
;D