Normal Operation

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

DTC U3003:17 (Battery Voltage: Circuit Voltage Above Threshold) - sets continuous and on-demand in the Headlamp Control Module (HCM) if the HCM detects battery voltage above 16 volts on the voltage input circuit.

This pinpoint test is intended to diagnose the following:

Charging system concern
HCM