EVT Mode Low - Engine Off

EVT Mode Low - Engine Off

When the transmission is operating in EVT Mode Low (D), and the HCM determines that operating conditions are appropriate, the internal combustion engine is turned OFF, the auxiliary fluid pump is turned ON, and the TCM commands the following changes to the transmission's hydraulic and electrical systems.

Torque Dampener Clutch Applies

Pressure Control (PC) Solenoid 5

The PC solenoid 5 is energized (ON) allowing actuator feed limit fluid to enter the PCS 5 signal circuit. PCS 5 signal fluid is then routed through orifice 13 to the dampener bypass clutch valve.

Dampener Bypass Clutch Valve

PCS 5 signal fluid, at the dampener bypass clutch valve, opposes dampener bypass clutch valve spring force and orificed dampener clutch fluid pressure to regulate line or auxiliary line pressure into the dampener clutch circuit. Dampener clutch fluid is routed to the torque dampener clutch.

Torque Dampener Clutch

Dampener clutch fluid pressure enters the torque dampener assembly and moves the torque dampener clutch piston against spring force and dampener clutch charge fluid pressure in order to apply the torque dampener clutch plates.

Variable Low and 1-2 Reverse Clutch Remains Applied

Variable Low and 1-2 Reverse Clutch Assembly

With the exception of the switch to auxiliary line fluid pressure from the auxiliary fluid pump, no other changes occur to the transmission's hydraulic system and the variable low and 1-2 reverse clutch remains applied.

EVT Mode Low - Engine Off