Generic Scan Tool (GST) Function: Description
WARNING: This page is about a different car, the 2010 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
Generic Scan Tool (OBD II scan tool) complying with SAE J1978/ISO 15031-4 has several functions explained below.
ISO15765-4 is used as the protocol.
The name GST or Generic Scan Tool is used in this service information.
Courtesy of NISSAN MOTOR CO., U.S.A.