G11 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
Reconnect the PCM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.
Is the concern still present?
Yes | CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM. REFER to: Powertrain Control Module (PCM) (303-14C Electronic Engine Controls - 5.0L 32V Ti-VCT/5.0L Ti-VCT V8 (308kW/418PS), Removal and Installation). CLEAR all Diagnostic Trouble Codes (DTCs) in all modules. |
|---|---|
No | The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. |
Load Shed Message Displays in Message Center
Refer to Wiring Diagrams Cell 12 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 - System Operation and Component Description (414-00 Charging System - General Information, Description and Operation). 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 C1046 for loose or corroded connections. Inspect battery and engine grounds for loose or corroded connections.
PINPOINT TEST H : LOAD SHED MESSAGE DISPLAYS IN MESSAGE CENTER
H1 PERFORM INSPECTION AND VERIFICATION
Perform Inspection and Verification procedure in this section.
Was an obvious cause for an observed or reported concern found?
Yes | CORRECT the cause as necessary. |
|---|---|
No | GO to H2 |
H2 VERIFY THE CUSTOMER CONCERN
Verify the customer concern by operating the charging system.
Did the customer indicate battery saver message only appeared in the centerstack with the engine running?
Yes
REFER to: Information and Entertainment System (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Diagnosis and Testing).
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.