System Components

System Components
Parts Location








Front and Rear Speed Sensors





The sensors are mounted to the transfer case, detect the rotation of rotors directly coupled to the propeller shafts. Thirty rectangular pulses are output per one rotation of the propeller shaft.

Electromagnetic Coil





Receives the duty signals from the TOD control unit and controls the pressing force of the clutch pressure cam.

Multi Plate Disk Clutch Pack





Transmits the torque determined by the clutch pressing force to the front propeller shaft via the front drive chain.

Mechanical Lock Sleeve





Couples the front and rear propeller shaft mechanically when the transfer shaft is in the4L position.

High-Low Planetary Gear Set





Establishes an auxiliary transmission mechanism. When the transfer shift lever is set to the TOD position, the reduction gear ratio is1.000 and the corresponding driving force is generated. When the transfer shift lever is set to the4L position, the reduction gear ratio is2.480 and the corresponding driving force is generated.

4H and 4L Switch





Detects the shift position of the transfer from the movement of the transfer lever and outputs signals to the TOD control unit.

Transfer Connector





Transmits the input and output signals of the speed sensors, electromagnetic coil, and4H and4L switch to the vehicle harness. A waterproof12-pin type is used.

TOD Indicator Lamps (on the instrument panel)
Inform the following items.
^ Bulb check
^ Drive mode
^ ABS IN status





^ BRAKE ON status

Check Lamp
Inform the following items.
^ Bulb check
^ Fail (fail alarm)





^ Trouble code

TOD ECU





This control unit is mounted to the front right hand seat via a special bracket.

Functions of Indicator Lamp





TOD Indicator Lamps

Indication of Drive Mode
The transfer lever position signals are transmitted to the TOD control unit according to the condition listed above.

Bulb Check
When the starter switch is turned on, the TOD indicator lamps go on as shown below.





Note: Once the starter switch is turned on, all the TOD indicator lamps are lit for two seconds, even if the transfer lever is in any position.

Simplified Checking Method of ABS INPUT and BRAKE ON Signals:





In the event that any of the signal inputs listed below are observed while the self-diagnostic code is being displayed (the self-diagnostic connector is short-circuited to GND), you can simply check the ABS INPUT and BRAKE ON signals as shown in the figures below.

Check Lamp
Check Lamp Bulb Check





When the starter switch is turned on in the normal state, the control unit turns on the CHECK lamp to check the bulb.