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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0B01, P0B04 or P0B07: Auxiliary Transmission Fluid Pump Low Current >> Circuit/System Description

Circuit/System Description

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The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The pump motor utilizes 3 phase AC electricity. The motor stator coil is comprised of three phase circuits. The phase circuits are identified as phase U, phase V and phase W. The U-V-W phase circuits are connected in a wye configuration. This means each phase is connected at a single, central point. The motor control modules monitor a current sensor connected to each motor phase. The current sensor is part of the power inverter module assembly and is not serviced separately. The hybrid/EV powertrain control module 1 is part of the power inverter module and is not serviced separately.