With Manufacturer's Scan Tool

Duty Check Data Link Connector (DLC):

PROCEDURE
The provisions for communicating with the Engine Control Module (ECM) are the Data Link Connector (DLC) and the diagnostic request terminal in the duty check DLC.

The duty check DLC is located in the right rear engine compartment near the battery. Diagnostic Trouble Codes (DTCs) stored in ECM memory can be read by through the TECH 1 diagnostic computer (a hand-held diagnostic scanner) plugged into the DLC. Follow the manufacturer's instructions.