Check you chassis wiring diagram
Not sure about your chassis
My 2008 W16 chassis has two Data connectors similar to most Mid to large trucks
The standard DTC 16 pin OBDII port where my Tech2 connects
PLUS
A 9 pin round J1939 connector where the ABS module and two CAN Buss are connected - The ABS module is NOT connected to the standard 16 pin DTC Connector in any way
I use the NEXIQ protocol converter along with WABCO Tool box software to access the ABS module - Yes the Tool Box software offers an ABS Bleed function. It works great