MacBook - Battery Thermal Diode 1 ?

Hi,

may be someone knows what this error means. I tested a MacBook 13", Aluminium, late 2008 witthout the Battery inside,

just with the power supply under ASD:

Temp (TB1T) - Battery Thermal Diode 1 temperature (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

ERROR -- 3 [Sensor reading below low point] -- (0.00) TEST FAILED

* TESTING FAILED [Elapsed time = 00:08:19] *

All other test passed completely with ASD OS and ASD EFI and I did not find any information about

this thermal diode. Does it seat on the logicboard or is it a cable possible to exchange ?

Thanks in advance !!