SSANGYONG Rodius 2012.07 Manual page 577

05-10
(2) Vacuum System Related to 4WD
In 4WD mode, the TCCU blocks the
transferring of vacuum pressure from
vacuum pump to locking hub by supplying
the power to solenoid valve.
Gear engaged
4WD:
The vacuum pressure is released from the
hub actuator. At this time, the front hub end
gear is engaged.
Block the vacuum
pressure
To atmosphere
Check valve
This valve allows the vacuum pressure to
flow through it in only one direction. This
prevent the vacuum from abruptly
releasing due to faulty vacuum pump.
Vacuum solenoid valve
Gear disengaged
2WD:
The vacuum pressure pulls in the locking
hub actuator so that it will not be engaged
with the front end hub gear.
Hub actuator (RH)