It can test the Isuzu engine sensor, adblue and DPF of the Diagnostic Denso ECU but it can't  test the Bosch and Delphi systems ISUZU. Only test denso isuzu,denso KATO,denso kobelco,denso Sumitomo denso HITACHI ECU/ECM.

Isuzu Truck Diagnostic and Programming tool
The EMPS3 is Isuzu's state of the art diagnostic tool that is used with all current Isuzu electronically controlled engines. It is used to update Isuzu electronic control units

Isuzu Tech2 can diagnose all Isuzu car model like UC, N, TF, F, C series.
The adapter should be used with GM Tech2 Interface

This adapter is used to diagnose the ISUZU vehicles or engine equipped with 24V battery and non-OBD II diagnostic connector.

IDSS USB-Link works very well,but there is no ECU/ECM plug connector,
so it can't write data into ECM/ECU.Other functions can be perfectly diagnosed, including Euro IV, Euro 5 DPF regeneration function, injector code, write VIN, diesel pump Functions such as adjustment functions.
G-IDSS is software,USB-LINK Special Edition is hardware.It can only test the Isuzu engine sensor, adblue and DPF of the Denso ECU/ECM.It is special edition,so don't choose USB-Link everytime,only one time choose USB-LINK driver is ok.