| Transfer position switch (combination switch assembly) |
Switches between the H4 and L4 drive modes. |
| Center differential lock switch |
Selects free or lock for the center differential. |
| Combination meter assembly |
4LO indicator light |
Illuminates to inform the user of transfer L4 mode status.
Blinks to inform the user of H4 and L4 mode switching.
Rapidly blinks (during DTC output) to inform the user of a transfer system malfunction.
HINT:
When the transfer is in L4 mode, VSC and TRC are prohibited. |
| Center differential lock indicator light |
Illuminates to inform the user of center differential lock status.
Blinks to inform the user of switching between free and lock.
Rapidly blinks (during DTC output) to inform the user of a center differential system malfunction. |
| Buzzer |
- Sounds 3 times when a communication malfunction occurs with the skid control ECU and the center differential mode is switched.
- When the vehicle speed condition is no longer met while the center differential is switching between free and lock, the buzzer sounds 3 times.
- When the vehicle speed condition is no longer met or when the shift lever is no longer in N while the transfer is switching between high and low, the buzzer sounds.
|
| Skid control ECU (master cylinder solenoid) |
Sends wheel speed signals to the 4 wheel drive control ECU via CAN communication. |
| ECM |
Sends information such as the shift position signal and engine speed to the 4 wheel drive control ECU via CAN communication. |
| 4 wheel drive control ECU |
Detects the vehicle status from wheel speed signals, engine speed signals, etc. received via CAN communication, and switches to the requested 4WD drive mode (H4 or L4, FREE or LOCK) by operating the high-low transfer actuator and center differential lock actuator according to the operation of the transfer position switch and center differential lock switch. |
| Transfer shift actuator assembly |
High-low transfer actuator |
High-low transfer shift motor and high-low transfer limit switch |
Operates the high-low transfer shift motor according to commands sent from the 4 wheel drive control ECU and switches the transfer (high or low). |
| Center differential lock actuator |
Center differential lock shift motor and center differential lock limit switch |
Operates the center differential lock shift motor according to commands sent from the 4 wheel drive control ECU and switches the center differential (free or lock). |
| Center differential lock detection switch |
Detects the center differential lock condition and sends that information to the 4 wheel drive control ECU. |