[Scouter-50]

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

 

[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.

 

[Scouter-50]

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

 

[johnbaker15]

There is a nice write up about the brown wire in the HOW. Look here, http://www.bmwlt.com/forums/faq.php?faq=k1200lt_faq_performance#faq_k1200lt_faq_hesitation

 

[DanMartin]

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

 

[bobst2]

is there any diffrence between the two mods in performance or fuel milage . or do they pretty much accomplish the same thing

 

[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.

 

[Scouter-50]

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.

 

[Cochinosucio]

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.

 

[DanMartin]

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.

 

[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.

 

[zippy_gg]

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.

 

[katnapinn]

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.