U1301 Class 2 Short to Battery

DTC U1301 - Class 2 Short To Battery:

CIRCUIT DESCRIPTION
When the ignition switch is in RUN, modules communicating on the Class 2 Data Bus send a "State of Health" (SOH) message every 5 seconds to ensure that the system is operating properly.

CONDITIONS FOR SETTING THE DTC
^ These Diagnostic Trouble Codes (DTCs) only set if DTC B1982 or B1983 is not current.
^ The module detects that the Class 2 bus is shorted to battery for at least 3 seconds.

CONDITIONS FOR CLEARING THE DTC
The module detects that the Class 2 bus is not shorted to battery.

DIAGNOSTIC AIDS
^ This DTC is never received as current because the Class 2 bus does not function during this condition.
^ Check CKT 1807 (PPL) for intermittent shorts to battery.