U1300, Class 2 Short To Ground: Notes
WARNING: This page is about a different car, the 1997 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
To identify wire colors and components on Class 2 serial data line, see appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS.
When BCM is energized, it monitors Class 2 serial data line for a short to ground. DTC U1300 will set when BCM determines Class 2 serial data line is shorted to ground for 10 seconds or more. DTC U1300 will clear when BCM determines Class 2 serial data line is no longer shorted to ground or when scan tool is used.