Connect GDS to Data Link Connector (DLC).
Warm engine up to normal operating temperature.
Turn "OFF" electrical devices and A/C.
Monitor "E/GAS TEMP. PRE VGT","E/GAS TEMP. PRE CPF" parameter on the GDS.
Specification : "E/GAS TEMP." is displayed.
Fig.1) "EXHAUST GAS TEMP." at idle is shown. Monitor if abnormall difference between "Fig.1) data" and the data from the vehicle to test.