Thermal Switch Operation (2Wd); Relief Valve Operation - Honda CR-V 1997 Service Manual

Thermal Switch Operation 12WD)
During 4WD operation, pressure-regulated fluid is in contact with the clutch piston and the thermal switch.
If the temperature of the fluid in the differential goes too high, the thermal switch pushes open the relief valve
R.
This
causes the pressure in the clutch pi ston to drop, and 4WD mode is disengaged.
THERMAL "lAliT''''
RELIEF VALVE
Relief Valve Operation
When the fluid pressure goes higher than the relief va lve spring force, check valve R opens. Pressure applied at the clutch
piston is held constant. This feature adds stability by preventing the rear wheel drive system from experiencing excessive
to rque.
RELIEF VALVE
15-9