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turbocharged 1993 VW air cooled Mexican bug Hi from Mexico v3.x Serialnr: ..... (or orderid ... ) '''Short history of the board''' * was purchased as assembled or mainboard ? * ... * I ask for the firmware for my board because '''by mistake I connected a temp sensor input to the 12v line''' ** ouch. First, '''If all the GND-s are OK, then 12V on the MAT or CLT input should not be fatal (it might not cause any damage)'''. Or was it K-thermocouple (EGT) input ? ** But if GND-s are not OK (or come off, or EC36 disconnected during powerup) that can be a problem, and firmware upgrade is very unlikely to solve the problem (it cannot cure if HW is damaged). I have a few problems with my genboard. When run VemsTune the software detect the board but pop up a window with legend device disconnected and the firmware upload menu is in grey color * Verify the RS232 connection, document here your wiring and voltage measurements: ** DSUB9/2 - ... ** DSUB9/3 - ... ** DSUB9/5 - ... Another thing the volt reg u20 gets very hot and the mosfet drivers gets warm * this sounds bad ** verify (measure) polarity and supply voltage: ... V ** measure current consumption: ... mA Make sure to follow instructions. * is there a chance +12V power was applied without grounds connected properly ? ** we've seen a case this year when GND came off (!) while +12V was applied (so powering GND through some FET outputs and atmega inputs => not good). This is also the reason why disconnecting EC36 under powerup is not allowed (damage is too likely). See grounds connection: http://vems.hu/download/v3/doc/ConnectingPower4.jpg For assembled board, see relevant info http://vems.hu/download/v3/doc/ (also useful for home-assembled box unless one intentionally deviates)
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