TRANSFER SYSTEM SYSTEM DESCRIPTION


  1. INDICATOR LIGHT OPERATION WHEN SWITCHING 4WD DRIVING MODE

    3 Drive Mode (H4F, H4L, or L4L) (for 2TR-FE or 5L-E)
    Driving Mode 4LO Indicator Light Center Differential Lock Indicator Light
    H4F (Transfer high and center differential free) Not illuminated Not illuminated
    H4L (Transfer high and center differential lock) Not illuminated Illuminated
    L4L (Transfer low and center differential lock) Illuminated Illuminated
    Center differential Switching between free and lock State of transfer indicated Blinking
    Transfer Switching between high and low Blinking State of center differential indicated
    Rear Differential* Switching between free and lock Illuminated Illuminated
    Switching complete Illuminated Illuminated

    • Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)


    • *: w/ Rear Differential Lock

    4 Drive Mode (H4F, H4L, L4F or L4L) (for 1GR-FE, 1GD-FTV or 1KD-FTV)
    Driving Mode 4LO Indicator Light Center Differential Lock Indicator Light
    H4F (Transfer high and center differential free) Not illuminated Not illuminated
    H4L (Transfer high and center differential lock) Not illuminated Illuminated
    L4F (Transfer low and center differential free) Illuminated Not illuminated
    L4L (Transfer low and center differential lock) Illuminated Illuminated
    Center differential Switching between free and lock State of transfer indicated Blinking
    Transfer Switching between high and low Blinking State of center differential indicated
    Rear Differential*2 Switching between free and lock Illuminated Illuminated
    Switching complete Illuminated Illuminated

    • Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)


    • *: w/ Rear Differential Lock

  2. FUNCTION OF COMPONENTS

    Components Functions

    Transfer position switch (combination switch assembly)*1

    Transfer position switch*2,*3

    Switches between the H4 and L4 drive modes.*1,*2

    Switches between the H4F, H4L and L4L drive modes.*3

    Center differential lock switch (combination switch assembly)*1

    Center differential lock switch (No. 2 combination switch assembly)*2*4

    Center differential lock switch*2*5

    		 Selects free or lock for the center differential.
    Combination meter assembly 4LO indicator light

    Illuminates to inform the user of transfer L4 mode status.*1, *2

    Illuminates to inform the user of transfer L4L mode status.*3

    Blinks to inform the user of H4 and L4 mode switching.*1, *2

    Blinks to inform the user of H4L and L4L mode switching.*3

    Rapidly blinks (during DTC output) to inform the user of a transfer system malfunction.

    Tech Tips

    When the transfer is in L4 mode, VSC and TRC are prohibited.*1, *2

    When the transfer is in L4L mode, VSC and TRC are prohibited.*3
    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 3 times.

    Skid control ECU (master cylinder solenoid)*6

    Skid Control ECU (brake actuator assembly)*7

    		 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.*1, *2

    Detects the vehicle status from wheel speed signals, engine speed signals, etc. received via CAN communication, and switches to the requested 4WD drive mode (H4F, H4L or L4L) 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.*3
    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.
    Clutch start switch assembly*5 Detects clutch pedal depression and sends that information to the 4 wheel drive control ECU.

    • *1: for 1GR-FE, 1KD-FTV, 1GD-FTV w/ Combination Switch

    • *2: for 1GR-FE, 1KD-FTV, 1GD-FTV w/o Combination Switch

    • *3: for 2TR-FE, 5L-E

    • *4: for Automatic Transmission

    • *5: for Manual Transmission

    • *6: for Hydraulic Brake Booster

    • *7: for Vacuum Brake Booster


    • Blinking: Blinks at 0.5 second intervals (0.5 seconds on and 0.5 seconds off)


    • Rapidly blinking: Blinks at 0.25 second intervals (0.25 seconds on and 0.25 seconds off)