Normal Operation

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1318 (Battery Voltage Low) - a continuous and on-demand DTC that sets when the Liftgate/Trunk Module (LTM) detects battery voltage below 9 volts on the voltage supply circuits for 3 seconds or longer.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
High circuit resistance
LTM