Select High-Low System (VF4BM)
INSPECTIONNOTICE:
^ Switch the four wheel drive control switch under the condition that A/T shift lever is in "N" position and the vehicle speed is 5 km/h or less.
^ Do not operate the four wheel drive control switch and the differential lock switch at the same time.
1. INSPECT H4 (Differential lock "FREE") -> H4 (Differential lock "LOCK") SHIFT
a. Start the engine, and the differential lock switch is in "OFF" position.
b. Turn the four wheel drive control switch to "H4" position while pressing it.
c. Check that the center diff. lock indicator light comes on after pressing the differential lock switch for 2 seconds. Check that the center diff. lock indicator light goes off after pressing the differential lock switch for 2 seconds.
2. INSPECT L4 (Differential lock "FREE") -> L4 (Differential lock "LOCK") SHIFT
a. Start the engine, and differential lock switch is in "OFF" position.
b. Turn the four wheel drive control switch to "L4" position while pressing it.
^ Check that the 4LO indicator light comes on after it is blinking.
^ Check that the center differential lock indicator light comes on after pressing the differential lock switch for 2 seconds. Check that the center diff. lock indicator light goes off after pressing the differential lock switch for 2 seconds.
3. INSPECT H4 (Differential lock "FREE") -> L4 (Differential lock "FREE") SHIFT
a. Start the engine, and differential lock switch is in "OFF" position.
b. Turn the four wheel drive control switch from the "H4" position to the "L4" position while pressing it.
c. Check that the 4-LO indicator light comes on after it blinking.
d. Turn the four wheel drive control switch from the "L4" position to the "H4" position while pressing it.
e. Check that the 4-LO indicator light goes off after it is blinking.
4. INSPECT H4 (Differential lock "LOCK") - L4 (Differential lock "LOCK") SHIFT
a. Start the engine, and differential lock switch is in "OFF" position.
b. Check that the center diff. lock indicator light comes on after pressing the differential lock switch for 2 seconds.
c. Turn the four wheel drive control switch from the "H4" position to the "L4" position while pressing it.
d. Check that the 4LO indicator light comes on after it is blinking.
e. Turn the four wheel drive control switch from the "L4" position to the "H4" position while pressing it.
f. Check that the 4LO indicator light goes off after it is blinking.
5. INSPECT DIFFERENTIAL LOCK SWITCH CONTINUITY
a. Remove the instrument panel finish lower panel sub-assy.
b. Remove the differential lock switch from the instrument panel finish lower sub-assy.
c. Inspect the continuity between the each terminal.
If continuity is not as specified, replace the differential lock switch or bulb.
6. INSPECT FOUR WHEEL DRIVE CONTROL SWITCH
a. Remove the center instrument cluster finish panel sub-assy.
b. Remove the four wheel drive control switch from the center instrument cluster finish panel sub-assy.
c. Inspect the continuity between the each terminals.
If continuity is not as specified, replace the four wheel drive control switch or bulb.
7. INSPECT ACTUATOR
NOTICE: Do as inspect the actuator while overhauling the transfer or as a unit.
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 is normal, replace the actuator.
8. INSPECT WIRE HARNESS
a. Disconnect the actuator connector and four wheel drive control ECU connector.
b. Check continuity on the wire harness between four wheel drive control ECU and the actuator.
If continuity is not as specified, repair or replace the wire harness.
9. INSPECT FOUR WHEEL DRIVE CONTROL ECU
a. Connect the wire harness side connector to the four wheel drive control ECU and inspect wire harness side connector from the back side, as shown.
STANDARD VALUE OF ECU TERMINAL