BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   How do I check the speedo sensor Empty How do I check the speedo sensor Mon Jun 10, 2013 7:33 pm

gpguyer

gpguyer
active member
active member
Guys I think I have a faulty speedo sensor. I have pulled the instrument panel apart and checked as much as I can there following intructions from this forum, Thanks. I am pretty sure the sensor is faulty. Can anyone help.

GPG

    

2Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Mon Jun 10, 2013 8:05 pm

charlie99

charlie99
VIP
VIP
have you done the usuall ....

pull the sensor ...and clean it up (usually gathers crap around the centre pole )

get to the under rhs side cover and deoxit the join in the cables

first things to try


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow do I check the speedo sensor Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

3Back to top Go down   How do I check the speedo sensor Empty How do I check the speedo sensor Mon Jun 10, 2013 8:06 pm

RT

RT
Life time member
Life time member
Hello mate
I've had a few problems with this before, most of which turned out to be the connector behind the right hand side panel. Follow the wire from the final drive end to where it connects to a flat 2 prong connector. Clean it thoroughly with an electrical cleaning agent of your choice (DeoxIt), then attach the wire to the frame with a cable tie. Mine kept jiggling loose.
If you still can't find the problem, undo the single screw at the final drive connection, and
gently pull the sensor out.(I have had to use a thin flat blade screw driver underneath it
to pry it up a bit), It just fits in the hole as there is a rubber bung around the end.

Apparently if you hold a heated soldering iron close to the end of the sensor, it will make
the speedo needle move as in motion.

If that fails, send me a pm as I have a spare used one here that I know works.
Good luck
RT Sorry Charlie was too busy typing to see your reply.



Last edited by RT on Mon Jun 10, 2013 8:07 pm; edited 1 time in total (Reason for editing : Too slow)


__________________________________________________
2011 R1200RT
    

4Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Mon Jun 10, 2013 8:31 pm

Crazy Frog

Crazy Frog
admin
admin
If you have a laptop, get the Karamba software and test your speedo from the laptop.
Check this post.


__________________________________________________
How do I check the speedo sensor Frog15How do I check the speedo sensor Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

5Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Mon Jun 10, 2013 10:48 pm

gpguyer

gpguyer
active member
active member
Thanks guys I will try all the above.

    

6Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Mon Jun 10, 2013 10:59 pm

RicK G

RicK G
admin
admin
With a 50Hz power supply you should read 60.9kph. You may need to take the sensor out of the drive unit as some soldering irons don't have a strong enough magnetic field.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

7Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sun Jun 16, 2013 2:15 am

K-BIKE

avatar
Life time member
Life time member
The advantage of using a mains soldering iron is the magnetic field will test the system end to end the iron does not need to be hot and if it is the type with a thermostat in it cold is better since when it is not heating the field will be very small.
Regards,
K-BIKE

    

8Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 2:15 am

weezyrider

weezyrider
active member
active member
Apologies for reviving this old thread, but could someone clarify, if the soldering iron makes the speedometer and odo/trip work properly, yet they don't work when ridden with the sensor installed,,,,is the sensor bad or good? Does it mean theres a weak or corroded connection somewhere? And is it normal for the sensor to get oil on the bottom of it when mounted/working? thanks all



Last edited by weezyrider on Sat Aug 23, 2014 2:16 am; edited 1 time in total (Reason for editing : pawr grammr)

    

9Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 3:30 am

charlie99

charlie99
VIP
VIP
wheezy

if things are connected properly ....then yes the soldering iron will emulate the rear wheel turning to the rest of the electronics

along the path to the speedo is a few joins ...one on the right hand side (behind the side cover  two pin flat type connector , similar to the brake light switches ) and another when the loom joins the instruments in that big two connector which has 2 parts .

we have found that the connectors corrode to a degree , over time , cant be helped in the atmosphere we subject bikes to  rain, sun and age and dc voltages .

look up "deoxit" ...found throughout the forum as a recommended and proven electrical connector cleaner for such issues

and yes the sensor is inside the rear drive housing subjected to the oil within .

we also find that small grains of metal wear off the gearsets within the dif (for want of a better word ) do collect around the sensor (basically shorting it out magnetically , with little bridges of metal between the central pole  and outer ) you may want to clean these off for proper operation  to start with . wd40 etc and a clean rag might do this well .

just a heads up


good luck


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow do I check the speedo sensor Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

10Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 4:18 am

weezyrider

weezyrider
active member
active member
I'm pretty familiar with the connections already, and have cleaned them along the way to repairing the gears in the speedo itself. My bike is very corrosion free, btw, due the very dry climate here.  I'm trying to determine if the sensor is bad or not as I'm pretty lost with electrical diagnosis. Basically, if the soldering iron works, does that mean the sensor is good and the power of the iron overcomes any poor connections?  Was actually hoping the sensor is bad, because I've had the speedo apart a dozen times or more cleaning and repairing.

    

11Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 4:41 am

charlie99

charlie99
VIP
VIP
you might try measuring the sensor with a multimeter  from the connector behind the side cover ....your looking for a few ohms (range 0- 2000 ohms )

then take it a stage further and try the same measurement at the instruments connector .

if you see any variation you are on the right path to finding the problem

alternatively you could use the multi meter on ac volts  and measure the connector at the side cover , rear wheel turning ( maybe in first gear idling )

you should get just under 100 millivolts  that's 0.100 volts ...if your multi meter goes on low voltages  ...try the 2 volt range if its not an autoranging meter

if all these test pass ...then it could be earthing to the instruments ...the electronic inside the instruments etc ....

what I do is try to prove a thing to be good ...along the path

diagnosis isn't hard ....if you eliminate the likely issues

problem is, folks discount issues without proving them to be good ..or bad..it takes time, patience and some little knowledge to know what to look for, if its a foreign concept .

its totally logical ....pretty hard in a new to you thing



Last edited by charlie99 on Sat Aug 23, 2014 4:49 am; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow do I check the speedo sensor Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

12Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 4:45 am

mr grumpy

mr grumpy
Silver member
Silver member
I believe the self-cancelling indicators are dependent upon the speedo sensor to measure the distance traveled with the indicator working. Therefore, if your indicators self-cancel after 300m (?) you may assume that the sensor is functioning and your problem is elsewhere. The converse is probably true, but based on the principle of "the grass is wet, therefore it is raining", not necessarily so!


__________________________________________________
K100RS 16v
    

13Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 4:57 am

charlie99

charlie99
VIP
VIP
true indeed mr grumpy

if the signal is passing though the electronic board properly

it would clearly indicate the meter motor is not working correctly ...but we have seen that the film circuit board has been known to have issues in the past ...sometimes requiring a rewire of the joining circuitry 

but a good identifier you have suggested

cheers !


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow do I check the speedo sensor Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

14Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 5:37 pm

weezyrider

weezyrider
active member
active member
I found the answer, I think, and that is the soldering iron technique can simply confirm (or not) that all of the electrical connections are good.  This also caused the signals to shut off, but speedo was working also so I can't say if one would work and not the other.  What seemed to be the cure was when I took a small needlenose pliers and rotated the little metal stub on the bottom of the sensor. Maybe there was a bad connection in there, but now everything works as it should. My trip meter numbers are turning a little notchy so far but I can live with that. Very glad I found out on this forum never to reset the trip while moving, as it can damage the gears in speedo. Thanks again for the input guys!

    

15Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sat Aug 23, 2014 9:08 pm

RicK G

RicK G
admin
admin
What model bike is it Weezy. I ask because the early Ks had a different sensor, it can be identified by the phillips head screw in the top of the sensor and can be pulled apart, the later is a sealed unit and can only be opened with considerable force like a hammer.  I think they were different in the resistance as well.
You could have an early type and rotating the centre has reconnected some wires. Likely to be temporary but keep the fingers crossed I've had fixes like that keep working for years.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

16Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Sun Aug 24, 2014 8:53 am

Holister

Holister
Life time member
Life time member
These instructions on how to calibrate your peedo may be helpful.
http://classickbikes.com/ckb.tech/0.ckb.tech.files/speedocal/speedocal.htm

Also if you need a wiring schematics diagram, print this out A3 size.
http://l.bitcasa.com/Z2z4z-IW

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  How do I check the speedo sensor Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

17Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Tue Aug 26, 2014 2:06 am

weezyrider

weezyrider
active member
active member
@RicK G wrote:What model bike is it Weezy. I ask because the early Ks had a different sensor, it can be identified by the phillips head screw in the top of the sensor and can be pulled apart, the later is a sealed unit and can only be opened with considerable force like a hammer.  I think they were different in the resistance as well.
You could have an early type and rotating the centre has reconnected some wires. Likely to be temporary but keep the fingers crossed I've had fixes like that keep working for years.

My bike is an 85 K100RS, and it does have the old style sensor apparently, because it has the phillips screw holding it together, which I removed and took the sensor apart but saw nothing really that looked wrong with it.  Still working after 200 miles so I'm hopeful.

    

18Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Tue Aug 26, 2014 2:51 am

Crazy Frog

Crazy Frog
admin
admin
Kaptain Holister wrote:Also if you need a wiring schematics diagram, print this out A3 size.
http://l.bitcasa.com/Z2z4z-IW

Cheers
Hmmm. Interesting how this work migrated from the forum to many other sites.

The same schematic as well as other colour ones is available on the forum download page  Very Happy

CF


__________________________________________________
How do I check the speedo sensor Frog15How do I check the speedo sensor Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

19Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Tue Aug 26, 2014 4:16 am

charlie99

charlie99
VIP
VIP
indeed bert ....

your reference diagram is great ...
cheers


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow do I check the speedo sensor Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

20Back to top Go down   How do I check the speedo sensor Empty Re: How do I check the speedo sensor Tue Sep 02, 2014 11:18 am

Holister

Holister
Life time member
Life time member
@Crazy Frog wrote:
Kaptain Holister wrote:Also if you need a wiring schematics diagram, print this out A3 size.
http://l.bitcasa.com/Z2z4z-IW

Cheers
Hmmm. Interesting how this work migrated from the forum to many other sites.

The same schematic as well as other colour ones is available on the forum download page  Very Happy

CF

Well that's probably where I found that. That link is not to a site but to my own personal files. I have resized the PDF so that it prints out properly to a full A3 page. Its hard to follow those schematics at the best of times without it being so small.

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  How do I check the speedo sensor Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum