Component Tests and General Diagnostics

ON-VEHICLE INSPECTION





1. CHECK DIFFERENTIAL LOCK INDICATOR SWITCH POSITION
a. Start the engine, and shift the transfer shift lever to the "H" position.
b. Check that the center differential indicator light comes on when the switch is in "ON" position. Check that the light goes off when the switch is in "OFF" position.





2. CHECK SHIFT LEVER POSITION
a. Start the engine, and turn the center differential lock switch OFF.
b. Check that the center differential indicator light comes on when the transfer shift lever is shifted to the "L" position. Check that the light goes off when the lever is shifted to the "N" or "H" position.





3. INSPECT CENTER DIFFERENTIAL LOCK CONTROL RELAY
a. Check that continuity exists between each terminal, as shown in the chart.

OK:

*: There is a diode between the terminals 6 and 7.
If no continuity exists, check that continuity exists when changing the position of positive (+) probe for the position of negative (-) probe of the tester.
b. Apply battery positive voltage between each terminal and check that continuity exists between each terminal, as shown in the chart.

OK:

If continuity is not as specified, replace the relay.





4. CHECK ACTUATOR OPERATION
a. Raise up the front wheels, place the stopper under the rear wheels to block them, and pull up the parking brake.
b. Disconnect the connector of the actuator and connect it to the relay using wire.





c. Check that the front propeller shaft can be rotated by hand.

HINT: When inspecting the operation described above, use a heater main relay.

OK:

NOTICE: Connect the terminals being careful not to touch the neighboring terminals or metallic parts of relay housing.