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Home >> Chevrolet >> 2021 >> Malibu LT >> Repair and Diagnosis >> Engine Mechanical >> Starter >> 12 V Starting And Charging - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC P0621 >> Circuit/System Description

Circuit/System Description

Circuit Description
B+ Supplied from a fuse.
Control The control module input circuit has an internal resistance connected to ground.
Component Description
G13 Generator The generator converts mechanical energy from the engine into electrical energy. It includes a 3-phase alternator, rectifiers and a regulator.
K20 Engine Control Module The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly.