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post #1 of 13 Old May 24th, 2012, 5:48 am Thread Starter
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air temperature sensor

Where is the fabled ambient air temperature sensor (supposedly in the air box) and do I really want to unplug it on an early 2000 K12LT? Also how do I read the date code in the VIN?
Thanks again guys, Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
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2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
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post #2 of 13 Old May 24th, 2012, 7:30 am
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Re: air temperature sensor

If you are REALLY GOOD, you can reach it without removing tupperware. It is up high, kinda above and behind the left radiator. Squeeze the metal tang on one side, and it comes right off. Make sure that your brown wire (search) hasn't been cut, or your cat code plug has not been removed before unplugging this sensor. You can do one (air temp sensor or brown wire/ cat code plug) BUT NOT BOTH. You will do bad things to the motor.

"You can tell more about a person by what he says about others than you can by what others say about him."
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Current Love
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Previous loves...
2000 K1200LT Canyon Red (Suzie Q)
1986 Honda Interceptor Black (Weezy)
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post #3 of 13 Old May 24th, 2012, 7:48 am Thread Starter
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Re: air temperature sensor

Quote:
Originally Posted by Cochinosucio
If you are REALLY GOOD, you can reach it without removing tupperware. It is up high, kinda above and behind the left radiator. Squeeze the metal tang on one side, and it comes right off. Make sure that your brown wire (search) hasn't been cut, or your cat code plug has not been removed before unplugging this sensor. You can do one (air temp sensor or brown wire/ cat code plug) BUT NOT BOTH. You will do bad things to the motor.
OK, where, when,how do I check for the brown wire/cat code plug?
Thanks, Robert

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

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post #4 of 13 Old May 24th, 2012, 7:57 am
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Re: air temperature sensor

There is a nice write up about the brown wire in the HOW. Look here, http://www.bmwlt.com/forums/faq.php?...faq_hesitation

John Baker

2005 BMW K1200LT
1979 Suzuki GS1000E
1978 Honda CB350
1975 Suzuki GT380
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post #5 of 13 Old May 24th, 2012, 8:00 am
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Re: air temperature sensor

This is a good thread about the cat code plug/brown wire/air temp sensor.

http://www.bmwlt.com/forums/showthread.php?t=61143

dan
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post #6 of 13 Old May 24th, 2012, 8:01 am
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Re: air temperature sensor

is there any diffrence between the two mods in performance or fuel milage . or do they pretty much accomplish the same thing
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post #7 of 13 Old May 24th, 2012, 11:36 am
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Re: air temperature sensor

Individually they accomplish them same goal, better performance at all operating temps. (Ambient). They force the computer to use one fuel map. Works great. Side effect: ALWAYS RUN PREMIUM GAS, ALWAYS.
I have done this mod on all three of my LTs.

"You can tell more about a person by what he says about others than you can by what others say about him."
Leo Aikman


Remember folks, street lights timed for 35 mph are also timed for 70 mph. ~Jim Samuels




Current Love
2001 K1200LT Champagne (Roxy)

Previous loves...
2000 K1200LT Canyon Red (Suzie Q)
1986 Honda Interceptor Black (Weezy)
1999 K1200LT Graphite (Grey Goose)
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post #8 of 13 Old May 24th, 2012, 11:47 am Thread Starter
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Re: air temperature sensor

Quote:
Originally Posted by Cochinosucio
Individually they accomplish them same goal, better performance at all operating temps. (Ambient). They force the computer to use one fuel map. Works great. Side effect: ALWAYS RUN PREMIUM GAS, ALWAYS.
I have done this mod on all three of my LTs.

I have an additional silly question. Since the sensor is giving a "bad" signal is there a replacement sensor that works and still controls detonation?

Thanks, Robert.

They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
Benjamin Franklin (1706 - 1790)


2000 K1200LT "Latifah"
1994 R1100RSL (wife's)
1981 R80GS
1976 R90S
1965 R80/2 Frankenbike (wife's)
2001 Bunkhouse LX (given to son)
2011 Bunkhouse Queen

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post #9 of 13 Old May 24th, 2012, 12:04 pm
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Re: air temperature sensor

Quote:
Originally Posted by Scouter-50
I have an additional silly question. Since the sensor is giving a "bad" signal is there a replacement sensor that works and still controls detonation?

Thanks, Robert.
Nope. Sensor is doing its job. It's the fuel map you want to fix. Disconnect sensor, fixed.

"You can tell more about a person by what he says about others than you can by what others say about him."
Leo Aikman


Remember folks, street lights timed for 35 mph are also timed for 70 mph. ~Jim Samuels




Current Love
2001 K1200LT Champagne (Roxy)

Previous loves...
2000 K1200LT Canyon Red (Suzie Q)
1986 Honda Interceptor Black (Weezy)
1999 K1200LT Graphite (Grey Goose)
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post #10 of 13 Old May 24th, 2012, 12:06 pm
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Re: air temperature sensor

Quote:
Originally Posted by Scouter-50
I have an additional silly question. Since the sensor is giving a "bad" signal is there a replacement sensor that works and still controls detonation?

Thanks, Robert.
It's not a "bad" signal. It sends the ambient temp to the motronic which switches to a hot weather fuel map that causes hesitation/stumbling.
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post #11 of 13 Old May 24th, 2012, 6:27 pm
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Re: air temperature sensor

It's my understanding that there is no brown wire to cut on a 2000 LT. I would look on mine but it is on loan right now.

Dave Selvig
2004 Black LT
2000 Canon Red LT



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post #12 of 13 Old May 24th, 2012, 6:29 pm
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Re: air temperature sensor

Quote:
Originally Posted by saddleman
It's my understanding that there is no brown wire to cut on a 2000 LT. I would look on mine but it is on loan right now.
You are correct no brown wire on 99 and 2000. Not sure when the brown wire became a factor;, but I do recall cutting it on my 03. The issue was resolved altogether on the 05 and newer models.

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post #13 of 13 Old May 24th, 2012, 6:29 pm
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Re: air temperature sensor

Quote:
Originally Posted by saddleman
It's my understanding that there is no brown wire to cut on a 2000 LT. I would look on mine but it is on loan right now.
My 2000 did NOT have the Brown wire. Grif used a set of hemostats to reach in & unplug mine just a few weeks after I bought the bike.

Stevie Shreeve
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