System Description

DESCRIPTION

CVT detects the vehicle driving status from switches, sensors and signals, and controls the vehicle so that the optimum shift position and shift timing may always be achieved. It also controls the vehicle to reduce shift and lockup shock, etc.
If a malfunction occurs on the electric system, activate the fail-safe mode only to drive the vehicle.

MAIN CONTROL CONTENTS OF TCM

Controls	Reference
Line pressure control	System Description
Shift control	System Description
Select control	System Description
Lock-up control	System Description
Idle neutral control	System Description
ECO mode control	System Description
SPORT mode control	System Description
Fail-safe	Fail-Safe or Fail-Safe
Self-diagnosis function	CONSULT Function
Communication function with CONSULT	CONSULT Function

LIST OF CONTROL ITEMS AND INPUT/OUTPUT

Control Item		Shift control	Line pressure control	Select control	Lock-up control	Fail-safe function*
Input	Engine torque signal (CAN communication)	X	X	X	X	X
	Engine speed signal (CAN communication)	X	X	X	X	X
	Accelerator pedal position signal (CAN communication)	X	X	X	X	X
	Closed throttle position signal (CAN communication)	X	X	X
	Stop lamp switch signal (CAN communication)	X	X	X	X
	Secondary pressure sensor	X	X	X	X
	CVT fluid temperature sensor	X		X	X	X
	Primary speed sensor	X	X	X			X
	Secondary speed sensor	X	X	X	X	X
	Output speed sensor	X	X	X	X	X
	Transmission range switch	X	X	X	X	X
	Overdrive control switch signal (CAN communication)	X
	ECO mode switch signal (CAN communication)	X
	SPORT mode switch signal (CAN communication)	X
Output	Line pressure solenoid valve	X	X	X	X
	Primary pressure solenoid valve	X	X
	Torque converter clutch solenoid valve	X		X
	High clutch & reverse brake solenoid valve	X	X			X
	Low brake solenoid valve	X	X			X
	Shift position indicator (CAN communication)	X
	OD OFF indicator lamp signal (CAN communication)	X
	ECO mode indicator lamp signal (CAN communication)	X
	SPORT mode indicator lamp signal (CAN communication)	X

*: If these input/output signals show errors, TCM activates the fail-safe function.