i took my car to get tested today and it didnt pass because they couldnt make a connection with my ecu. I have a JDM type s ecu currently in my car. Do USDM scanners communicate with JDM ecu's ? Also they said my voltage was to low and that it could be a fuse. Would this low voltage cause my ecu not to communicate with the scanner? if not what would cause my ECU not to communicate with the OBD scanner?

 

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JDM ecus don't communicate with the OBD2 scanners.

You need to run a USDM obd2 ecu for it to communicate.