Normal Operation

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

DTC B1318 (Battery Voltage Low) - sets in continuous memory and on-demand in the Instrument Cluster (IC) if the IC detects battery voltage below 9 volts on the voltage supply circuit.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
High circuit resistance
IC