Description of 4WD Control System Operation - Suzuki Jimny Workshop Manual

When “4WD” switch is pushed at 2H, the 4WD control module shifts the transfer to 4H as follows.

The 4WD control module flashes the 4WD indicator and runs the transfer shift control actuator motor. The transfer shift actuator motor shifts the shift fork shaft No.1 via the pinion gear until the 4WD switch is turned ON.

And, locks the air locking hub and turns ON the 4WD indicator.

If the 4WD control module does not detect the ON signal from the 4WD switch for 3 seconds after starting the shift operation, the 4WD control module returns the transfer shift actuator motor to the 2H position.

Also, the shift fork shaft No.1 shifts the front drive gear shift fork, and then the front drive clutch hub and the output front shaft are engaged via front drive clutch hub sleeve.

At this time, the driving force from the input shaft is transmitted to the transfer output front shaft and output rear shaft.

However, the shift operation will cancel under the following conditions.

When “4WD-L” switch is pushed at 4H, the 4WD control module shifts the transfer to 4L as follows.

The 4WD control module flashes the 4WD low indicator and runs the transfer shift control actuator motor until the transfer shift actuator limit switch is at the 4L position.

The transfer shift actuator motor shifts the shift fork shaft No.1 via the pinion gear. And, if it is difficult to shift the shift fork shaft No.1 to the 4L position, the transfer actuator keeps the shift operation by the spring included in the transfer shift actuator.

When the transfer shift actuator shifts the shift fork shaft No.1 to the 4L position, the 4WD low switch is turned ON and the 4WD control module turns ON the 4WD low indicator.

Also, the shift fork shaft No.1 shifts the high & low shift fork, and then the output low gear and the output rear shaft are engaged via the reduction clutch sleeve.

At this time, the driving force from the input shaft is transmitted to the transfer output front shaft and the output rear shaft through the counter gear at a reduced speed.

However, the shift operation will cancel under the following conditions.

When “4WD” switch is pushed at 4L, the 4WD control module shifts the transfer to 4H as follows.

The 4WD control module flashes the 4WD low indicator and runs the transfer shift control actuator motor until the transfer shift actuator limit switch is at the 4H position.

The transfer shift actuator motor shifts the shift fork shaft No.1 via the pinion gear. And, if it is difficult to shift the shift fork shaft No.1 to the 4H position, the transfer actuator keeps the shift operation by the spring included in the transfer shift actuator.

When the transfer shift actuator shifts the fork shaft No.1 to the 4H position, the 4WD low switch is turned OFF and the 4WD control module turns OFF the 4WD low indicator.

Also, the shift fork shaft No.1 shifts the high & low shift fork, and then the output low gear and the output rear shaft are disengaged via the reduction clutch sleeve.

At this time, the driving force from the input shaft is transmitted to the transfer output front shaft and the output rear shaft without speed reduction.

However, the shift operation will cancel under the following conditions.

When “2WD” switch is pushed at 4H, the 4WD control module shifts the transfer to 2H as follows.

The 4WD control module flashes the 4WD indicator and runs the transfer shift control actuator motor until the transfer shift actuator limit switch is at the 2H position. If the 4WD control module does not detect the 2H position signal from the transfer shift actuator limit switch for 3 seconds after starting the shift operation, the 4WD control module returns the transfer shift actuator motor to the 4H position.

The transfer shift actuator motor shifts the shift fork shaft No.1 via the pinion gear. And, if it is difficult to shift to the 2H position, the transfer actuator keeps the shift operation by the spring included in the transfer shift actuator.

When the transfer shift actuator shifts the shift fork shaft No.1 to the 2H position, the 4WD switch is turned OFF.

And, unlocks the air locking hub and turns OFF the 4WD indicator.

Also, the shift fork shaft No.1 shifts the front drive gear shift fork, and then the front drive clutch hub and the output front shaft are disengaged via front drive clutch hub sleeve.

At this time, the driving force from the input shaft is only transmitted to the transfer output front shaft.

However, the shift operation will cancel under the following condition.

When “4WD-L” switch is pushed at 2H, the 4WD control module shifts the transfer to 4L as follows.

In the same operations as explained in “Shift Operation from 2H to 4H” and “Shift Operation from 4H to 4L”, the 4WD control module shifts the transfer 2H→4H→4L.However, the shift operation will cancel under the following conditions.

When “2WD” switch is pushed at 4L, the 4WD control module shifts the transfer to 2H as follows.

In the same operations as explained in “Shift Operation from 4L to 4H” and “Shift Operation from 4H to 2H”, the 4WD control module shifts the transfer 4L→4H→2H.However, the shift operation will cancel under the following conditions.