4WD SYSTEM




EASY SELECT 4WD SYSTEM



POWER FLOW






2WD/4WD SWITCHING MECHANISM







2WD OPERATION ("2H" POSITION SELECTED)

When "2H" is selected, the 2WD/4WD synchroniser sleeve is in the position shown as the figure. On this position, the drive sprocket does not rotate, and the drive torque does not transmit to the front differential. Therefore, the vehicle operates as a rear drive vehicle.

4WD OPERATION ("4H" OR "4L" POSITION SELECTED)

When "4H" or "4L" is selected, the 2WD/4WD synchroniser sleeve is in the place shown as the figure. On this position, the 2WD/4WD synchroniser hub and the drive sprocket are connected with the 2WD/4WD synchroniser sleeve for rotation, and the drive torque transmits to the front differential. Therefore, the vehicle operates as a four-wheel drive vehicle.

DOUBLE CONE SYNCHRONIZER






4WD INDICATOR-ECU
With the ON/OFF signals from each switch installed on the transfer and freewheel clutch, the drive state is determined, and the 4WD indicator lamp is controlled.

4WD INDICATOR LAMP
The 4WD indicator lamp indicates the currently selected mode of operation of the 4WD system. The 4WD indicator lamp is located in the combination meter.
Transfer shift position
 2H
 →
 4H
 →
 4L
 →
 4H
 →
 2H
Indicator lamp
 OFF
 Flash
 ON
 OFF
 ON
 OFF
 ON
 Flash
 OFF
Ignition switch
 OFF
 ON
 OFF
High/Low detection switch
 ON
 OFF
 ON
 OFF
 ON
4WD detection switch
 OFF
 ON
 OFF
Freewheel solenoid valve
 OFF
 ON
 OFF
 ON
 OFF
Freewheel engage switch
 OFF
 ON
 OFF

SUPER SELECT 4WD SYSTEM




DRIVE METHODS
Transfer shift pattern
 Position
 2WD/4WD
 High/Low
 Centre differential
 Drive condition


2H
 2WD
 High
 -
 For driving on a dry ordinary road or highway. (Economical driving position)
4H
 4WD
 High
 Operating
 For ordinary and slippery road driving. (VCU functions to limit the differential operation)
4HLc
 4WD
 High
 Locked
 For driving on rough, sandy or snow-covered roads.
4LLc
 4WD
 Low
 Locked
 For greater traction torque as when climbing steep inclines.

POWER FLOW






2WD/4WD SWITCHING MECHANISM






2WD OPERATION ("2H" POSITION SELECTED)

When "2H" is selected, the 2WD/4WD synchroniser sleeve is in the position shown as the figure. On this position, the drive sprocket does not rotate, and the drive torque does not transmit to the front differential. Therefore, the vehicle operates as a rear drive vehicle.

4WD OPERATION ("4H" POSITION SELECTED)

When "4H" is selected, the 2WD/4WD synchroniser sleeve is in the place shown as the figure. On this position, the 2WD/4WD synchroniser hub and the drive sprocket are connected with the 2WD/4WD synchroniser sleeve for rotation, and the drive torque transmits to the front differential. Therefore, the vehicle operates as a four-wheel drive vehicle.
At this time, even if rotation speeds differ between the front and rear wheels, the centre differential is effective because the differential lock hub is free. This allows the smooth drive. VCU incorporated in the centre differential limits the rotation speed difference to achieve the constant optimal drive force according to the rotation speed difference.

4WD OPERATION ("4HLC" OR "4LLC" POSITION SELECTED)

When "4HLc" or "4LLc" is selected, the 2WD/4WD synchroniser sleeve is in the place shown as the figure. On this position, the differential lock hub, the 2WD/4WD synchroniser hub, and the drive sprocket are connected with the 2WD/4WD synchroniser sleeve for rotation, and the drive torque transmits to the front differential. Therefore, the vehicle operates as a four-wheel drive vehicle.

DOUBLE CONE SYNCHRONIZER






4WD INDICATOR-ECU
With the ON/OFF signals from each switch installed on the transfer and freewheel clutch, the drive state is determined, and the 4WD indicator lamp is controlled.

4WD INDICATOR LAMP
The 4WD indicator lamp indicates the currently selected mode of operation of the 4WD system. The 4WD indicator lamp is located in the combination meter.