Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2012EXPLORER FWD V6-3.5LREPAIR AND DIAGNOSISSTARTING AND CHARGINGCHARGING SYSTEMDESCRIPTION AND OPERATIONOVERVIEW
2012 Ford Explorer FWD V6-3.5L
Charging System: Description and Operation: Overview
2012 Ford Explorer FWD V6-3.5LSECTION Overview
Charging System
Overview
The generator is driven by the accessory drive belt. When the engine is started, the generator begins to generate AC (Alternating Current) which is internally converted to DC (Direct Current). The DC (Direct Current) is controlled by the voltage regulator (located on the rear of the generator) and supplied to the battery. The PCM (Powertrain Control Module) controls the voltage regulation setpoint, working with the generator internal voltage regulator over 2 control and communication circuits.
This vehicle is equipped with load shed strategy. With the engine off, the BCM (Body Control Module) monitors the battery state of charge using the battery current sensor attached to the negative battery cable. With the engine running, the BCM (Body Control Module) monitors system voltage to the BCM (Body Control Module) and PSCM (Power Steering Control Module).
The PCM (Powertrain Control Module) monitors the generator current using the generator current sensor attached to the generator B+ battery cable. The information supplied to the PCM (Powertrain Control Module) from the generator current sensor is used by the PCM (Powertrain Control Module) to adjust the engine idle stability and torque control.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.