Variable Geometry Turbocharger (VGT) is used to charge additional air into combustion chamber for improvement of combustion efficiency.
ECM controls the duty of VGT solenoid valve according to engine load.
Turn the ignition key off.
Disconnect the VGT actuator.
Measure resistance between the terminals 1 and 2 of the VGT actuator.
Refering to " SPECIFICATION", check that the resistance is within specification.