SYSTEM DESCRIPTION
1. DESCRIPTION
When the transfer is in L4 and the differential lock switch is operated, the 4 wheel drive control ECU supplies power to the solenoid to switch the rear differential from free to locked, and cuts power to switch the rear differential from locked to free.
for 2WD:
When the differential lock switch is operated, the 4 wheel drive control ECU supplies power to the solenoid to switch the rear differential from free to locked, and cuts power to switch the rear differential from locked to free.
2. INDICATOR LIGHT AND BUZZER OPERATING CONDITIONS
(a) for 4WD:
Mode |
2WD/4WD Mode Status |
Rear Differential Lock Indicator Light |
4WD Indicator Light (Green) and 4LO Indicator Light |
Buzzer |
---|---|---|---|---|
Rear differential free |
2WD or H4 |
Not illuminated |
Turned off or illuminated to display 2WD or H4 mode status |
Not sounding |
Rear differential free |
L4 |
Not illuminated |
Illuminated |
Not sounding |
Rear differential switching between free and locked |
L4 |
Blinking |
Illuminated |
Not sounding |
Rear differential locked |
L4 |
Illuminated |
Illuminated |
Not sounding |
Rear differential lock malfunction |
2WD, H4 or L4 |
Rapidly blinking |
Illuminated |
Not sounding |
(b) for 2WD:
Mode |
Rear Differential Lock Indicator Light |
Buzzer |
---|---|---|
Rear differential free |
Not illuminated |
Not sounding |
Rear differential switching between free and locked |
Blinking |
Not sounding |
Rear differential locked |
Illuminated |
Not sounding |
Rear differential lock malfunction |
Rapidly blinking |
Not sounding |
3. FUNCTION OF COMPONENTS
Components |
Functions |
|
---|---|---|
Differential lock coil |
Switches the rear differential between free and locked according to commands from the 4 wheel drive control ECU. |
|
Differential Lock Indicator Switch |
Detects the rear differential locked condition and sends that information to the 4 wheel drive control ECU. |
|
Combination meter assembly |
|
Illuminates to inform the user of the locked condition. Blinks to inform the user of switching between free and locked. Rapidly blinks to inform the user of a system malfunction. for 4WD: When the differential lock switch is pressed while not in L4, the indicator light blinks 3 times and the buzzer sounds 3 times. HINT: When the rear differential is in the locked condition, ABS, VSC and TRAC are prohibited. |
Differential lock switch |
Selects free or locked for the rear differential. |
|
Skid control ECU (brake actuator assembly) |
Outputs wheel speed signals to the 4 wheel drive control ECU via CAN communication. |
|
4 wheel drive control ECU |
Detects the vehicle status according to signals such as the wheel and vehicle speed signals received via CAN communication, and operates or stops the differential lock coil and switches the rear differential between locked and free according to the differential lock switch signal. |
Removal
REMOVAL
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting
the cable from the negative (-) battery terminal. Therefore, make sure to read the
disconnecting the cable from the negative (-) battery terminal notices before pr ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FUEL INJECTOR ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
20°C (68°F)
11.6 ...
Front Fog Light Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the front fog lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing
the following inspection procedure.
If the main body ECU (multiplex ...