Ok, clip a lead onto the ground and the other one to the signal of the hall to be tested, this with the controller powered up.
As you slowly turn the motor's case, the voltage should change from quite low to around 4v for each of the hall sensors. They should react pretty consistantly between each other.
As you slowly turn the motor's case, the voltage should change from quite low to around 4v for each of the hall sensors. They should react pretty consistantly between each other.