Normal Operation

WARNING: This page is about a different car, the 2012 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

DTC U3003:62 (Battery Voltage: Signal Compare Failure) - a continuous and on-demand DTC that sets when the BCM-B detects battery voltage 1.5 volts above or below specific thresholds.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
High circuit resistance
Charging system concern
BCM-B