Hydraulic Flow: Notes

As the engine turns, the ATF pump starts to operate. Continuously variable transmission fluid (CVTF) is drawn through the ATF strainer and discharge into the hydraulic circuit. Then, CVTF flowing from the ATF pump flows to the PH regulator valve and becomes pressure high (PH) pressure. PH pressure flows to the pulley control valves and then to the pulleys. The TCM actuates the solenoids to control hydraulic pressure shifting pulley ratio and engaging the start clutch.

Hydraulic pressure at the port is as follows:

Port	Description of Hydraulic Pressure	Port	Description of Hydraulic Pressure
CC	Start Clutch Control	LUB'	Lubrication
CCB	Start Clutch Control B	PH	Pressure High
COL	ATF Cooler	PHC	Pressure High Control
CR	Clutch Reducing	RCC	Recirculation
DN	Driven Pulley	Rl	Reverse Inhibitor
DNC	Driven Pulley Control	RVS	Reverse Brake
DR	Drive Pulley	RVS'	Reverse Brake
DRC	Drive Pulley Control	SC	Start Clutch
FWD	Forward Clutch	SI	Shift Inhibitor
LUB	Lubrication	X	Drain