MIL Code 1203...Overrun Clutch Solenoid

I have a 1999 Infiniti G20 and got a check engine code 1203...I checked on se-r.net and says "Overrun Clutch Solenoid" under description. This code reference is from the 95-98 200SX codes but it should still be the same.

My question is what does it mean? What does Overrun Clutch Solenoid mean?

Here is a link (http://www.se-r.net/engine/ecu_codes_200sx.html)