Component Tests and General Diagnostics
ONE TOUCH 2-4 SELECTOR SYSTEMParts Location:
ON-VEHICLE INSPECTION
NOTICE:
- 4HI - 4LO: Stop the vehicle and apply the brake, then first shift the transmission shift lever into the "N" position.
- Do not operate the four wheel drive control switch and the differential lock switch at the same time.
- Do not change from 2WD to 4WD when vehicle speed is 62 mph (100 km/h) or more.
1. INSPECT 2WD - 4HI (4WD AND DIFFERENTIAL LOCK "FREE") SHIFT
a. Start the engine.
b. Push the 2WD/4HI switch once.
c. Check that the 4WD indicator light stays lit after blinking. (The center differential lock indicator light blinks while being shifted.)
d. Push the 2WD/4HI switch once again.
e. Check that the 4WD indicator light goes off after blinking. (The center differential lock indicator light blinks while being shifted.)
2. INSPECT 4HI (4WD AND DIFFERENTIAL LOCK "LOCK") - 2WD
a. Start the engine.
b. Push the 2WD/4HI switch once.
c. Check that the 4WD indicator light stays lit after blinking.
d. Push the differential lock switch once.
e. Check that the center differential lock indicator light stays lit after blinking. Push the differential lock switch once again.
g. Check that the center differential lock indicator light goes off after blinking.
3. INSPECT 4HI (4WD AND DIFFERENTIAL LOCK "LOCK") - 2WD
a. Start the engine.
b. Push the 2WD/4HI once.
c. Check that the 4WD indicator light stays lit after blinking.
d. Push the differential lock switch once.
e. Check that the center differential lock indicator light stays lit after blinking.
f. Push the 2WD/4Hl switch once again.
g. Check that the 4WD and center differential lock indicator lights go off after blinking.
4. INSPECT 2WD - 4LO (4WD AND DIFFERENTIAL LOCK "FREE")
a. Start the engine.
b. Push the 4LO switch once.
c. Check that the 4LO indicator light stays lit after blinking. (The 4WD and center differential lock indicator lights blink while shifting.)
d. Push the 2WD/4Hl switch once. Check that the 4LO indicator light goes off after blinking. (The 4WD and center differential lock indicator lights blink while shifting.)
5. INSPECT 4LO (4WD AND DIFFERENTIAL LOCK "FREE") - 4LO (4WD AND DIFFERENTIAL LOCK "LOCK")
a. Start the engine.
b. Push the 4LO switch once.
c. Check that the 4LO indicator light stays lit after blinking.
d. Push the differential lock switch once.
e. Check that the center differential lock indicator light stays lit after blinking.
f. Push the differential lock switch once again.
g. Check that the center differential lock indicator light goes off after blinking.
6. INSPECT 4HI (4WD AND DIFFERENTIAL LOCK "FREE") - 4LO (4WD AND DIFFERENTIAL LOCK "FREE")
a. Start the engine.
b. Push the 2WD/4Hl switch once.
c. Check that the 4WD indicator light stays lit after blinking.
d. Push the 4LO switch once.
e. Check that the 4WD indicator light goes off and the 4LO indicator light stays lit after blinking. Push the 4LO switch once again.
g. Check that the 4LO indicator light goes off after blinking and the 4WD indicator light comes on.
7. INSPECT 4HI (4WD AND DIFFERENTIAL LOCK "LOCK") - 4LO (4WD AND DIFFERENTIAL LOCK "LOCK")
a. Start the engine.
b. Push the 2WD/4Hl switch once.
c. Check that the 4WD indicator light stays lit after blinking.
d. Push the differential lock switch once.
e. Check that the center differential lock indicator light stays lit after blinking.
f. Push the 4LO switch once.
g. Check that the 4WD indicator light goes off and the 4LO indicator light stays lit after blinking.
h. Push the 4LO switch once again.
i. Check that the 4LO indicator light goes off after blinking and the 4WD indicator light comes on.
8. INSPECT 4LO (4WD AND DIFFERENTIAL LOCK "LOCK") - 2WD
a. Start the engine.
b. Push the 4LO switch once.
c. Check that the 4LO indicator light stays lit after blinking.
d. Push the differential lock switch once.
e. Check that the center differential lock indicator light stays lit after blinking.
f. Push the 2WD/4HI switch once.
g. Check that the 4LO and center differential lock indicator lights go off after the 4LO and 4WD indicators are blinking.
9. INSPECT 2WD/4HI, 4LO AND DIFFERENTIAL LOCK SWITCH
a. Remove the instrument panel finish lower panel.
b. Inspect the continuity between each terminal.
If continuity is not as specified, replace the instrument panel finish lower panel.
10. INSPECT ACTUATOR
NOTICE: Inspect the actuator with the transfer removed from the vehicle.
a. Turn the ignition switch to ON.
b. Check the operating sound produced by four wheel drive control switch operation and the differential lock switch operation.
If the operating sound cannot be heard, check the four wheel control ECU and the wire harness in the next step. When the wire harness and four wheel drive control ECU are normal, replace the actuator.
11. INSPECT WIRE HARNESS
a. Disconnect the actuator connector and four wheel drive control ECU connector.
b. Check continuity of the wire harness between the four wheel drive control ECU and the actuator.
If continuity is not as specified, repair or replace the wire harness.
12. INSPECT FOUR WHEEL DRIVE CONTROL ECU
a. Connect the wire harness side connector to the four wheel drive control ECU and inspect the wire harness side connector from the back, as shown.
Standard Value Of ECU Terminal:
Standard Value Of ECU Terminal (continued):
Standard Value Of ECU Terminal (continued):
Standard Value Of ECU Terminal (continued):
