Normal Operation

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. 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 if the ABS module detects that the battery voltage dropped below 9 volts on the voltage supply circuit when the vehicle speed was greater than 5 km/h (3 mph).

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Charging system concern
ABS module