Last fall (on the northern hemisphere) I have done the traditional resoldering
job on the contatcs of my 850TDI 1997 ABS-unit. No failures after that during
the cold period. Now summer is approaching and lately some days when outside
temp is about 25 centigrade or higher the ABS and TRACS light go on again. When
turning off the engine and restarting, usually the lights disappear again. In
the morning when temp is still cool around 10 degrees centigrade, there is never
a problem during my 80 km trip to work.
I suppose that my soldering was still not good enough and during high
temperatures the different expansion rates of the materials cause again bad
contact. I did not glue the lid of the unit back with plastic mass as suggested,
but attached it with several layers of strong adhesive tape. It should be
dusttight at that place.
So I plan either to resolder it myself or send it somewhere to have it
resoldered.
Any other suggestion what might be the cause for the heat-failure of the
ABS-unit?
Franz47
