Charging System: Overview

The generator is driven by the accessory drive belt. When the engine is started, the generator begins to generate Alternating Current (AC) which is internally converted to Direct Current (DC). The Direct Current (DC) is controlled by the voltage regulator (located on the rear of the generator) and supplied to the battery. The Powertrain Control Module (PCM) controls the voltage regulation set point, 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 Body Control Module (BCM) monitors the battery state of charge using the battery current sensor attached to the negative battery cable. With the engine running, the Body Control Module (BCM) monitors system voltage to the Body Control Module (BCM) and Power Steering Control Module (PSCM).

The Powertrain Control Module (PCM) monitors the generator current using the generator current sensor attached to the generator B+ battery cable. This is used for engine idle stability and torque control.