2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 54Get this manual
TECHNICAL FEATURES SHIFT CLUTCH HYDRAULIC CIRCUIT AND OPERATION This system activates the AfT clutch PC solenoid valve, shift solenoid valve and as the PCM detects the following sig-
throttle angle vehicle speed
sub-transmission gear position (D- Rl drive mode (AUTOESP)
- engine oil temperature
It controls the shift clutches for the situation according to tile combination of the respective solenoid valves operationGear in Neutral
Gear position
Neutral
I Clutch PC Solenoid
Shift Solenoid