Bob, don't bother buying the Suzuki test meter, it is simply a decent quality digital multimeter. Any of the test procedures in the manual that measure volts should work on any decent digital multimeter.
Now for the testing! Both the CMP and CKP sensors are the older style, "coil" sensor, which makes them quite easy to test. If the resistance between the two wires is good (within manual specs) and from either wire to ground is o/c (open circuit, infinite ohms) (WHEN the coil is unplugged!) the sensor is good.
The most common fault with this type of coil is a heat-caused failure, where the motor will run until hot, and then fail with error code until it cools down again. I have not seen this fault on a busa coil, but quite common on some cars ignition pickup coils.
Now, for testing the coils with the motor cranking, the otherwise excellent Suzuki manual forgets to tell you to turn the multimeter to AC VOLTS, as all coil pickups of this type produce an ac waveform when operating. If you have an auto-selecting meter it will turn to AC VOLTS by itself and give you the right reading, but if you have a normal meter you have to select DC VOLTS or AC VOLTS - depending what you want to measure.
Maybe that's why you weren't getting the right voltage when cranking?
The peak volts from this type of sensor when cranking depends largely on the cranking speed, fresh battery=faster cranking=higher ac volts from sensor. Allow for any reading +/- 30% from manual's specs should be ok. The main test was the resistance test above.
To get back to your PC2 problem, why do you think it is the sensor? Does the PC2 go between the crank sensor and the ECM?? I would like to know more.
For the other board members, I would like to apologise on behalf of myself and Bob, next time we will use more foul language and ZX-12 references, as there is no excuse for posting these dry technical subjects...