4 Runner 2WD L4-2693cc 2.7L DOHC MFI (1997)
5. Install the ECU in place.
3. Inspect the differential lock components by doing the following.
a. Inspect the relay operation.
1. Jack up the vehicle.
2. Use a heater main relay and connect it, as shown below.
NOTE: 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.
b. Inspect the differential lock control switch continuity. Inspect the switch continuity between terminal one to terminal four.
NOTE: If it is not continuity, replace the switch.
