Pinpoint Test I : Load Shed Message Displays In Message Center: Notes

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Charging System for schematic and connector information.

Normal Operation and Fault Conditions

When the engine is off and the key is in on or accessory mode, and the BCM determines the battery state of charge is below 50%, or 45 minutes have elapsed, a load shed message is sent over the CAN. This message turns off the audio/navigation system to save the remaining battery charge. Under this condition the a load shed message will be displayed to notify the driver that battery protection actions are active:

System Off to Save Battery Turn Ignition Off displays on the FCDIM (without touchscreen controls)
SYSTEM OFF TO SAVE BATTERY PLEASE TURN IGNITION OFF OR START ENGINE displays on the FDIM (with touchscreen controls)
Battery Saver - System Off displays on the FDIM (with Sync)

These messages displaying may be normal operation and not indicate a fault. Refer to the Owner Literature and REFER to: Charging System - 3.0L Power Stroke Diesel - System Operation and Component Description . Load shed messages displaying with the engine running or only on the FCDIM or the FDIM (with touchscreen controls) indicates the audio system has detected a fault.

Possible Sources

Normal operation
Audio system
Battery
BCM
Fuses or Fusible Links
Generator
Wiring, terminals or connectors

Visual Inspection and Diagnostic Pre-checks

Inspect the high current BJB for loose or corroded connections.
Inspect the battery for loose or corroded connections.
Inspect the generator for loose or corroded connections.
Inspect the BJB for loose or corroded connections.
Inspect the high current BJB for loose or corroded connections.
Inspect C146 for loose or corroded connections.
Inspect battery and engine grounds for loose or corroded connections.