Hi.
First things first.
The proper truck number should be H2X351L045... which means it is 351-03 series from 2000.

There's no computer disgnostics on this series of the trucks.
Truck Doctor is usefull only with 350 series from this year and some electric trucks.

You can use the special tester device (the socket is near the ignition area), but generally this tester is rather presumed for engine adjustments.

The traction module is responsible for the engine only. No other electronics on the truck excluding standard engine issues, temperature sensors or indicators.
When it comes to traction controller repplacement, you just do it, no calibration nor adjustments.

To be frank - it's very rare case that this controller gets faulty. If you have the problems with traction, probably this is the hydraulics issue.