Originally Posted by chad.nuesmeyer
So what buses have OBDII... I have an '01 Blue Bird with Cummins and Allison...Does that one have OBDII?
your Van cutaway busses will have OBD-II, they were sold in pure van form as consumer vehicles so they had to be OBD-II
commercial trucks were exempt from the law that went into effect way back when so they are on different stuff..
your large bus platforms are usually on J1708 or J1939 (newer).. some of the newest stiuff is on the 50k baud.
the Majority of our busses on here are J-1708 considered "Legacy" engines as far as international..
I know International gives away the legacy ServiceMaxx software with some of the options disabled unless you activate it.. but that only covers Internationals with International Engines.. Namely the 2 relevant to this forum would be the DT-466E and the T-444E..
Cummins (if electronically controlled) will likely be J-1708 however i dont know what software you would use to program or read it out, Torque works for the cummins in consumer pickups as they are OBD-II, but im sure the PID's are different in the commercial ECM..
your AT-545 (if your engine is electronic) is still a mechanical transmission but MAY have an electronic Modulator.. basically the computer operates an electric motor which simulates the shift-throttle-cable.. this was done on the fly-by-wire engines.. because there was no way to actuate a cable since the pedal is just a controller..
once you get into the 2000 Series.. SOME of the PCM software allows you some access to allison, but typically you need a separate cable and software to program the allison transmissions themselves... ie to iunlock 6th gear, control lockup functions, and the like..