Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold) - sets in the Instrument Panel Cluster (IPC) in continuous memory if the IPC detects battery voltage below 9 volts on the voltage input circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
High circuit resistance
IPC