Last I checked you can't really test capacitors with a multimeter. You need some pretty fancy equipment to directly test a capacitor, either that or to build a circuit and observe if it performs properly. You will definitely need to remove a capacitor from the circuit board to test it because the other components it's connected to will change the reading.

I'd go ahead and replace them anyway. I think the caps in IIci's are old enough that they should all ideally be replaced by now. If they aren't leaking yet, they probably will soon.