DTC B1480: Battery Rundown Protection Circuit Malfunction: Description

The battery rundown protection function allows the BCM to disable courtesy lights, cargo lights and underhood light 40 minutes after ignition is turned off. The BCM monitors the output of the inadvertent power relay on Orange wire at BCM connector C2 terminal B12.

When BCM commands the inadvertent power relay on and there is no voltage at BCM connector C2 terminal B12 for .5 second, DTC will be set. DTC will not set if system voltage is not 9-16 volts. When DTC is set, courtesy lights, cargo lights and underhood light will be disabled.