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
|
|