SYSTEM DESCRIPTION
1. DESCRIPTION
2. DRIVING MODE SWITCHING PATTERN
*1 |
Transfer Position Switch |
- |
- |
3. INDICATOR LIGHT, WARNING MESSAGE AND WARNING BUZZER OPERATING CONDITIONS
2WD/4WD Mode Control
Mode |
4WD Indicator Light (Green) |
4LO Indicator Light |
Multi-information Display Message |
Warning Buzzer |
---|---|---|---|---|
2WD |
Not illuminated |
Not illuminated |
- |
Not sounding |
While switching between 2WD and H4 |
Blinking |
Not illuminated |
- |
Not sounding |
H4 |
Illuminated |
Not illuminated |
- |
Not sounding |
While switching between H4 and L4 |
Illuminated |
Blinking |
- |
Not sounding |
L4 |
Illuminated |
Illuminated |
- |
Not sounding |
A.D.D. Actuator malfunction |
Not illuminated |
Not illuminated |
2WD-4WD mode change malfunction visit your dealer |
Not sounding |
High-Low malfunction |
Status displayed*1 |
Rapidly blinking |
- |
Not sounding |
Other switching malfunction*2 |
Not illuminated |
Rapidly blinking |
2WD-4WD mode change malfunction visit your dealer |
Not sounding |
Control Mode |
2WD/4WD Mode Status |
4WD Indicator Light (Green) |
4LO Indicator Light |
Multi-information Display Message |
Warning Buzzer |
---|---|---|---|---|---|
Front differential oil temperature warning starts |
H4 |
Illuminated |
Not illuminated |
Differential oil temp high Shift to 2WD mode Cooling time required |
Sounding |
L4 |
Illuminated |
Illuminated |
Differential oil temp high Shift to 2WD mode Cooling time required |
Sounding |
|
Vehicle speed limit control starts*1 |
H4 |
Illuminated |
Not illuminated |
Differential oil temp high Shift to 2WD mode Cooling time required |
Sounding |
L4 |
Illuminated |
Illuminated |
Differential oil temp high Shift to 2WD mode Cooling time required |
Sounding |
|
While switching to 2WD |
H4 |
Illuminated |
Not illuminated |
Differential oil temp high Shift to 2WD mode Cooling time required |
Sounding |
Switching to 2WD complete |
2WD |
Not illuminated |
Not illuminated |
Differential oil temp high Cooling time required |
Sounding finished |
Vehicle speed limit control finished |
2WD |
Not illuminated |
Not illuminated |
- |
Not sounding |
Front differential oil temperature sensor malfunction |
- |
Not illuminated |
Status displayed*2 |
2WD-4WD mode change malfunction visit your dealer |
Not sounding |
4. FUNCTION OF COMPONENTS
Components |
Functions |
|
---|---|---|
Transfer position switch |
Switches between the following 3 drive modes: 2WD, H4 and L4. |
|
Combination meter assembly |
4WD indicator light (green) |
Illuminates to inform the user of 4WD mode status. Blinks to inform the user of mode switching. |
Multi-information display |
Displays a malfunction message to inform the user of a system malfunction. Displays a message to inform the user of a front differential oil temperature warning. |
|
4LO indicator light |
Illuminates to inform the user of L4 mode status. Blinks to inform the user of mode switching. Rapidly blinks to inform the user of a system malfunction. |
|
Warning buzzer |
Sounds to inform the user of a front differential oil temperature warning or switching condition violation. |
|
Skid control ECU (brake actuator assembly) |
Outputs wheel speed signals to the 4 wheel drive control ECU via CAN communication. |
|
ECM |
Outputs information such as the shift lever position and engine speed to the 4 wheel drive control ECU via CAN communication. |
|
Clutch start switch assembly (for Manual Transmission) |
Detects clutch pedal depression and sends that information to the 4 wheel drive control ECU. |
|
4 wheel drive control ECU |
Detects the vehicle status from wheel speed signals, vehicle speed signals, etc. received via CAN communication, and switches to the requested 4WD mode (H4 or L4) by operating the transfer shift actuator assembly and A.D.D. actuator (differential vacuum actuator assembly) according to the operation of the transfer position switch. |
|
Transfer shift actuator assembly |
Transfer shift motor and limit switch |
Operates the shift motor according to commands sent from the 4 wheel drive control ECU and switches to 4WD mode (H4 or L4). |
4WD detection switch |
Detects the 4WD condition and sends that information to the 4 wheel drive control ECU. |
|
L4 detection switch |
Detects the low gear position and sends that information to the 4 wheel drive control ECU. |
|
A.D.D. actuator (differential vacuum actuator assembly) |
A.D.D. shift motor and limit switch |
Operates the A.D.D. shift motor according to commands sent from the 4 wheel drive control ECU and switches between 2WD and 4WD. |
A.D.D. position switch |
Detects the 2WD and 4WD A.D.D. positions and sends that information to the 4 wheel drive control ECU. |
|
Oil temperature sensor |
Detects the oil temperature in the front differential. |
Touch Panel Switch does not Function
PROCEDURE
1.
CHECK MULTI-DISPLAY
(a) Check if there is any foreign matter caught between the display and exterior
frame of the multi-display.
OK:
No foreign matter is caught between the display and exterior frame of the multi-display.
HINT:
If there is foreig ...
Four-wheel drive system
Use the front-wheel drive control switch to select the following transfer modes.
H2 (high speed position, two-wheel
drive)
Use this for normal driving on dry hard-surfaced roads.
This position gives greater economy, quietest ride and least wear.
H4 (high speed position, four-wheel
drive) ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Sliding Roof / Trouble Codes.
(e) Check the details of the DTC(s) (See page
).
2. CLEAR DTC
(a) Connect th ...