Generic Scan Tool (GST) Function: Description
WARNING: This page is about a different car, the 2010 Infiniti M45. 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 has several functions explained below.
ISO9141 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.