Charging System: Overview

The generator is driven by the accessory drive belt. When the engine is started, the generator begins to generate AC which is internally converted to DC. The DC is controlled by the voltage regulator (located on the rear of the generator) and supplied to the battery. The PCM 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 monitors the battery state of charge using the battery current sensor attached to the negative battery cable. With the engine running, the BCM monitors system voltage to the BCM and PSCM.

The PCM monitors the generator current using the generator current sensor attached to the generator B+ battery cable. The information supplied to the PCM from the generator current sensor is used by the PCM to adjust the engine idle stability and torque control.