Montero 4WD V6-35L SOHC (1998) Differential Lock Solenoid Specs - Page 2902
Apply negative pressure and carry out the following inspections.
1) With no other operation, negative pressure is maintained.
2) When battery positive voltage is applied to solenoid B, the negative pressure equalizes.
3) When battery positive voltage is applied to solenoid A, the negative pressure equalizes.
5. Measure the resistance of the solenoid valves.
Standard value: 36 - 46 ohms [at 20°C (68°F)]
Replace the solenoid valve if not within the standard value.