Tacoma Extra Cab Limited 4WD V6-3.4L (5VZ-FE) (2000)
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1. Turn the ignition switch to the ON position.
2. Keep the center Diff. lock condition.
3. Remove the Diff . lock ECU.
4. Using a voltmeter, measure the voltage when the differential lock control switch is in the position as shown below.
If the circuit is not as specified, replace the ECU.
5. Install the ECU in place.
3. INSPECT DIFF. LOCK COMPONENTS
a. Inspect the relay operation.
1. Jack up the vehicle.
2. Use a heater main relay and connect it, as shown in the chart.
NOTICE: Connect the terminals being careful not to touch the neighboring terminals or metallic parts of the relay housing.
3. Rotate the tire and check that differential lock has occurred.
If operation is not as specified, replace the actuator.
