Reverse Problem - BMW Luxury Touring Community
 
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post #1 of 15 Old Jul 24th, 2015, 11:36 am Thread Starter
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Reverse Problem

Hi everyone

I have a 2003 K1200lt problem just started I put it in reverse and press the button and my bike starts going back for 6 inches then stop.This continues for as long as I hold the button. Can anyone tell me what is going on? Or tell me where to start checking.

Thanks for any and all help
Ervin
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post #2 of 15 Old Jul 24th, 2015, 11:48 am
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Re: Reverse Problem

I recently read in another thread that this condition can be caused by a bad speed sensor.

Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #3 of 15 Old Jul 24th, 2015, 11:56 am Thread Starter
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Re: Reverse Problem

Hi bmwcoolk1200

Thanks for the help. Do you know where the speed sensor is located at?
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post #4 of 15 Old Jul 24th, 2015, 12:07 pm
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Re: Reverse Problem

Quote:
Originally Posted by Ervin View Post
Hi bmwcoolk1200

Thanks for the help. Do you know where the speed sensor is located at?
On my 2001LT it is on the top of the final drive. I believe 2002 or 2003 is when they moved it or combined it with another speed sensor so not entirely sure on your bike. If you have a wire running to the top of your final drive then that is it. If not, will have to wait till one of the heavy weights chime in like Saddleman or Sailor who have definitive information on all years and can tell you where to look.

Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #5 of 15 Old Jul 24th, 2015, 12:43 pm
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Re: Reverse Problem

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Originally Posted by Ervin View Post
Hi bmwcoolk1200

Thanks for the help. Do you know where the speed sensor is located at?
from the manual I have, it looks like it is at the front of the transmission on the right side if not on top of the final drive. This picture leaves much to be desired as it doesn't show a good pic of where to look in the expanded view. On older models, it is in a hole on top of the FD. See second picture arrow. Sensor is not in place but that is where it would be.

It is #5 in the diagram.
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Gordon
Sugar Hill, GA
2001 K1200LTI Champagne (current ride) Lazy Susan
1998 R1100RT Never should have sold it
1974 Yamaha TX 750 Twin. Omni Phase Balanced


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post #6 of 15 Old Jul 24th, 2015, 1:28 pm
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Re: Reverse Problem

it on the side of tranny on the right side of the bike just above the foot peg on my 03.
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post #7 of 15 Old Jul 24th, 2015, 1:29 pm
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Re: Reverse Problem

it on the right side of my bike above the foot peg. its an 03

03 k1200 ltc
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post #8 of 15 Old Jul 24th, 2015, 1:47 pm Thread Starter
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Re: Reverse Problem

Again thanks to all of you for the help still at a lost as to what to check first. Or if it's the speed sensors on the rear or the trans. How is the sensor check? Also after reading some of post on this subject could it be a relay and if so where is the relay?

At a lost as to what to check first
Thanks for all the help
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post #9 of 15 Old Jul 24th, 2015, 2:46 pm
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Re: Reverse Problem

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Originally Posted by Ervin View Post
Hi everyone

I have a 2003 K1200lt problem just started I put it in reverse and press the button and my bike starts going back for 6 inches then stop.This continues for as long as I hold the button. Can anyone tell me what is going on? Or tell me where to start checking.

Thanks for any and all help
Ervin
This sounds very much like a problem with speed sensor *signal* missing. That can be caused either by faulty sensor OR (also known problem) a problem in the connector coming from the sensor. What I am wondering is the "6 inches". Usually when this problem appears the bike moves few feets before stopping / requiring new push of starter button.

Born to be wild so why not

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post #10 of 15 Old Jul 24th, 2015, 8:27 pm
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Re: Reverse Problem

If your sensor is disconnected or it is bad the reverse will work just as you described. A few feet and stop then you have to release the button and press it again. Normal operation is the bike will reverse as long as you hold the button.

First find the sensor and trace the cable up to where it plugs into the harness. If it is plugged in OK then the sensor is bad.
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John
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
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Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #11 of 15 Old Jul 24th, 2015, 9:56 pm Thread Starter
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Re: Reverse Problem

Hi Jzieler

Thanks for the responce I order a new it is sensor coming this saturday. Hope for the best. Is there a way to test it?

Thank all you guys for all the great help I can't say that enough.
Ervin
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post #12 of 15 Old Jul 25th, 2015, 10:15 am
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Re: Reverse Problem

Check BMWcoolk1200s illustration . The first drawing. Its. #5 on the drawing. Thats your speed sensor. Change it,your good to go. I have an 04. Same problem.

2004 K1200LT. Big Mama
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post #13 of 15 Old Jul 25th, 2015, 2:15 pm Thread Starter
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Re: Reverse Problem

Hi everyone

I replace the speed sensor but that didn't help. The bike still goes about half a foot as long as I hold the button down and the reverse light flashing while holding down the button to. The only thing I can think of is that it is either the wiring come from the main box to the sensor or the main box. Does anyone have info on that?

I am going on a 1500 mile ride with this bike does the reverse system affect any other system that could cause a problem out side of the backing up problem.

Thanks for all the help
Ervin
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post #14 of 15 Old Jul 25th, 2015, 2:30 pm
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Re: Reverse Problem

bike will run fine!

03 k1200 ltc
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post #15 of 15 Old Jul 25th, 2015, 6:59 pm
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Re: Reverse Problem

I ran mine for a year before I fixed it does not hurt a thing replaced the sensor and it was good to go; take it on trip fix it when you get back but I do think you have a bad conection to the sensor

Gary
2003 K1200LT
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