The smog inspection process requires your Mitsubishi Lancer's accessories be turned off during the smog check (this includes the A/C). I'm afraid you might have trouble getting a smog station to smog check your Mitsubishi with the air conditioning on. On a side note having your A/C on during the emissions test might increase emissions due to the additional load being placed on the engine by the A/C. Your best bet is to find a way to turn off the A/C before the test. If you can not fix the A/C knob, consider finding the A/C fuse/relay and disconnecting it. Refer to your vehicle's owners manual.
