4x4 CONTROL SYSTEM COMPONENTS AND FUNCTIONS [WL-C, WE-C (AT)]

id0318d7164000

Electrical component

Part name			Function
4x4 CM			•  Sends ON/OFF signals to lock and free solenoids and indicator lights according to signals from various switches
Input	Digital TR sensor		•  Detects selector lever N position
	4x4 switch		•  Detects 4x4 switch 2H, 4H or 4L position
	Speed sensor		•  Detects output shaft speed
Output	Solenoid		•  Switched ON/OFF by electrical signals from 4x4 CM •  Regulates RFW unit “lock“ or “free”
		Lock	•  Switched ON when “locked”
		Free	•  Switched ON when “free”
	Motor component (transfer case)		•  Sets transfer case operation mode (2H, 4H or 4L)
	Clutch coil (transfer case)		•  Operates when 4H or 4L selected
	4x4 indicator light		•  Illuminates when 4H or 4L selected
	4L indicator light		•  Illuminates when 4L selected

Mechanical component

Part name	Function
RFW unit	•  Transmits front propeller shaft rotation to front tires
RFW actuator	•  “Locks“ or “free” RFW unit
One-way check valve	•  Prevents leakage of vacuum
Motor component (transfer case)	•  Motor operates to slide each shift fork
Clutch coil (transfer case)	•  Magnetic force occur in clutch coil during operation to pull the lockup component

Relationship of Component and Function

Part name		Input			Output
Function		Digital TR sensor	4x4 switch	Speed sensor	Lock solenoid	Free solenoid	Motor component	Clutch coil	4x4 indicator light	4L indicator light
Controlled by driver		x	x
Controlled by 4x4 CM				x	x	x	x	x	x	x