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.
If the 4X4 control module observes an overpower or under power voltage condition, DTCs are set and the 4X4 control module may not allow Four-Wheel Drive (4WD) operation.
- DTC B1317 Battery Voltage High - When the 4X4 control module detects battery voltage greater than 16 volts for at least 10 seconds, this DTC is set.
- DTC B1318 Battery Voltage Low - When the 4X4 control module detects battery voltage less than 9 volts for at least 10 seconds, with the engine running at 1,500 rpm or greater, this DTC is set.
This pinpoint test is intended to diagnose the following:
- Fuses
- Vehicle battery
- Charging system
- Wiring, terminals or connectors
- 4X4 control module