Dwa and normal battery

[Girl on a motorbike]

Sorry to ask this but being new to Bmw ownership Im going to ask.a few.questions and see if I can get some answers before spending money.
Have a 2005 reg 1200gs non sevro brakes model with 36500 miles on it.
Recently replace Fpc been running fine.

Bit.colder this morning about 3 degrees went to start it up turned clicked almost fired up then nothing displayed DWA and an empty box on the dash.

Left it a few hours to warm up and about 3pm it fired up left it running to charge battery all seemed fine but DWA displayed again and it blew.a headlight bulb which I changed.

I had to ride about 45 miles mostly on motorways. Bike started fine no probs on tickover.
Rode about 30 miles and noticed a surge on a constant throttle as if it was being starved of fuel.
Stopped and topped up.
Bike sounded very rough almost as if it was running on one.cyclinder then.it would pick up and clear but sounded rough on tick over.
Question s would a flat battery cause this rough running or would the flat DWA batteries cause this ( done the search now know i will.have to change the DWA batteries, or hubby will)
No key fob with bike just put key in and go.
Sorry for the long post any help.please.

Sent from my GT-N7000 using Tapatalk

 

[Ojay]

Sounds like your alarm batteries are shot... there easy enough to change... http://www.pixum.co.uk/my-photos/slide/album/5924917

 

[Mr K]

This site is brilliant.

Cheers Ojay!

 

[Mr K]

Replaced the batteries and still getting DWA battery low indication.

Does this need resetting with the 911 thingy?

 

[kevmean]

If a vehicles battery is on it's last legs it will often throw up random errors due to the voltage drop whilst starting ( clocks resetting / error codes coming up due to the ecu seeing incorrect voltages from sensors / bad running due to sensor feedback wrong until voltage recovers ) Make sure battery is good with good clean connections and good connections at all earth points.

 

[Pukmeister]

Is your bike battery the original factory fitted one? If so, it's lasted well.

Might be worth replacing it, I would recommend a Motobatt battery for added starting power, available for less than £50 online.

 

[(RIP) Bin Ridin]

Replaced the batteries and still getting DWA battery low indication.

Does this need resetting with the 911 thingy?

Don't think so. Should not contribute to bad running either, in my opinion.

What was behind the recently replaced FPC item?

 

[kevmean]

Low battery voltages can definitely cause poor running on modern vehicles (not to say this is the fault on this occasion ) but things like tps sensors can only give a correct position to the ecu if they are supplied with the correct voltage to begin with.

 

[Mr K]

Don't think so. Should not contribute to bad running either, in my opinion.

What was behind the recently replaced FPC item?

I haven't replaced the FPC for years.

Unlike the OP I'm getting DWA battery low on start-up check, which refers to the back-up batteries in the alarm unit on the 'bike itself.

Changing those batteries for new ones has not got rid of the warning on starting-up.

 

[Pukmeister]

Chris K, if your main battery is on the way out it could cause a few electronic hiccups such as mystery alarms/warnings. Not guaranteed to be the cause, but you could swap with a mates battery for diagnostic testing and see if the fault goes away? If so, you know to spend on a new battery for your bike.

 

[Mr K]

Chris K, if your main battery is on the way out it could cause a few electronic hiccups such as mystery alarms/warnings. Not guaranteed to be the cause, but you could swap with a mates battery for diagnostic testing and see if the fault goes away? If so, you know to spend on a new battery for your bike.

I suppose after 9 years a precautionary battery change will hardly be a waste of money.

 

[JJH]

Why not test battery and charging system with a multi meter and a high rate discharge tester? It might trow up some answers. JJH

 

[(RIP) Miff]

I suppose after 9 years a precautionary battery change will hardly be a waste of money.

Exide make the oe batteries.

It's Tapatalk. Get over it.

 

[Mr K]

Exide make the oe batteries.

It's Tapatalk. Get over it.

Ordered a Motobatt MBTX12U...for £49.50 delivered.

 

[Mr K]

Why not test battery and charging system with a multi meter and a high rate discharge tester? It might trow up some answers. JJH

I have neither at hand.

 

[(RIP) Miff]

I have neither at hand.

I use an old 9083 as a multimeter. Stashed some away before they got removed.

It's Tapatalk. Get over it.

 

[Mr K]

I use an old 9083 as a multimeter. Stashed some away before they got removed.

It's Tapatalk. Get over it.

JDSU ain't all dat.

 

[snaponphil]

Sounds like excessive voltage drop on cranking (start up)
Dwa has possibly logged as fault code, if bike had ABS fitted flat or low voltage usually disables the abs function & would need GS 911 thingy (or trip to dealer) to reset fault codes after new battery fitted.
In future a quick easy test would be to use quality jump leads connected to car battery whilst starting. This would limit the voltage drop on starting. ( possibly fault codes would already be set though)
Have fun...

 

[(RIP) Bin Ridin]

Chargers can hide duff batteries, to detriment of the whole system.

 

[Pukmeister]

I suppose after 9 years a precautionary battery change will hardly be a waste of money.

Yours must be some sort of record for a 1200, either you are lucky or your bike is well cared for.