TMT78N2K Current Supported Parameters:

Engine RPM
Engine boost pressure
Engine oil pressure
Engine oil temperature
Engine oil level
Engine coolant temperature
Engine coolant pressure
Engine fuel rate
Engine fuel pressure
Engine fuel level
Average fuel rate
Trip fuel used
Engine discrete status
Total engine hours
Percent engine load
Rated engine speed
Engine VIN
Engine software ID
Transmission direction (forward, neutral, reverse)
Transmission oil pressure
Transmission oil temperature
Transmission oil level
Transmission discrete status
Alternator potential
Battery potential
Battery current
Active/Inactive diagnostic trouble codes*

* Diagnostic trouble codes are translated from J1587/J1708 into J1939 DM1 and DM2 messages, and are only readable by devices that specifically support them.