I have a (B4) 1995 Passat GLX VR6 with the TEVES 04 ABS system. The hydraulic unit has one coil for the RF inlet valve that tests sporadically bad (open circuit or high resistance)
Does anyone know if the electrical side of this part can be taken apart and re-assembled without damage? Does anyone know of any repair that is possible on the coils in this unit?
Background: My car has 160k miles and is 10.5 yrs old so one consideration I have is to unhook the ABS and go without it. If it is possible, I would prefer to repair the offending coil obviously due to the high cost of the part.
I diagnosed the problem with VAG-COM and it showed error code 00259 which is a too-high resistance on the valve N99. What is interesting to me is that the ABS light often has come on when the engine is started cold, but if the engine is started hot the ABS light virtually always goes off (at least during the summer it has). The failure obviously is at least partially temperature-dependant. This behaviour had me believing that the failure was due to a sticking spool valve that somehow was more 'loose' when the unit was hot. However, I have checked the resistance of the coil at the 15-pin connector to the Hyd. unit and this one coil indeed reads higher than the others. 9ohm to open circuit as compared to 7.5 ohm on the good inlet valves.
Thanks in advance for any help! regards, Mark