Engine Running Load Shed
When the BCM and/or PCM voltage is low, with the engine running, the BCM sends a message to either minimize or shut down the climate controlled seats, rear defrost, heated mirrors and climate control blower motor to improve system voltage. Under this condition, the FCDIM (without touchscreen controls) or FDIM (with touchscreen controls) displays LOW BATTERY FEATURES TEMPORARILY TURNED OFF to notify the driver that battery protection actions are active during a Load Shed 2 continuous event.
There are 3 states of engine running load shed:
| Load Shed State | Entry Conditions | Impact to Features | Clear Conditions |
|---|---|---|---|
| Load shed 1 | Alternator at full load and battery discharging while driving. System voltage less than 11.5 volts | Incrementally reduce loads. If equipped: Climate controlled seats, Heated Mirrors and Heated Backglass are turned Off | System operating at normal power level. |
| Load shed 2 transient | EPAS indicating reduced voltage and increased current. System voltage less than 11 volts | Turn Off Loads without customer indication. If equipped, Climate controlled seats, Heated Mirrors and Heated Backglass | System operating at normal power level. |
| Load shed 2 continuous | Load Shed 2 Transient condition in excess of 20 seconds | In addition to Load Shed 2 Transient turn off Climate Control Blower (reduced speed less FMVSS required operation). During Load Shed 2 Continuous feature on indication will turn off for Heated Steering Wheel, Climate Controlled Seats, Heated Mirrors and Heated Backglass. | System operating at normal power level. |