Hi,

I am working on a 2000 740i with many problems. First my Snap-on Modis can only get connected to the automatic transmission module (AGS), but it can't to ABS, engine management (DME) and airbags. Second I got the 130 Can: Timeout ABS/ASC/ASD and 128 Can monitoring codes. Third, transmision is in failsafe mode. Fourth, every time transmision gets into this mode the engine coolant temperature gauge gets into the red area.

I have checked continuity between all the cables in the bus and they are fine. Though there isn't continuity between AGS and ABS modules. Resistance between CAN h and CAN l are fine in every module. CAN voltage (around 2.3 volts) and waveforms getting into ABS seems, the rest measured at others points of the CAN seems wrong (7.5 volts) and "ugly" waveforms.

I need the CAN bus wiring diagram and any method to check if the ABS/ASC/ASD module is defective. Does anybody have this wiring diagram or where could I get online? Because this information is unavailable at Bolivia, my home country. Please advice.

Gabriel