Differential Lock System Circuit Inspection

Rear Differential Lock System Circuit Inspection:

1. Inspect battery positive voltage. Battery positive voltage: 10 - 14 V
2. Inspect system circuit with connector disconnected. Disconnect the connector from the 4WD control ECU and inspect the connector on the wire harness side, as shown in the chart.

HINT: If the circuit is not as specified, check and repair or replace the trouble part shown.





3. Inspect system circuit with connector connected.
a. Turn the ignition switch to ON position.
b. Keep the center Diff. lock condition.
c. Remove the Diff. lock ECU.
d. Using a voltmeter, measure the voltage when the differential lock control switch is in the position, as shown. If the circuit is not as specified, replace the ECU.
e. Install the ECU in place.