Need help identifying wires on 3-phase single-volt AC motor (6 leads)
You have a three phase motor with thermal protection.
From True Fitness Max Drive Motor AC 5 HP CS6.0 CS8.0 OC460000 Works with Treadmill by True Fitness.

So if you look at your results.  A is only connected to D.  This corresponds to P1 and P2 Thermostat leads.
BC = 2.2
CE = 2.5
BE = 2.5
These correspond to UVW (Line 1 to 3).  The order does not mater, aside from directional.  Reverse any two and the motor should change direction.
Only true way to test it is to wire it up and apply power.  Usually, threadmills are discarded when the motor dies.