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Home >> Chevrolet >> 2021 >> Bolt EV Premier >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information and Procedures >> DTC P057B-P057E, P05DC-P05DF, or P05E0 >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Hydraulic Brake System Description and Operation 

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Signal The control module input circuit has an internal resistance connected to ground.
Low Reference Grounded through the control module.
Component Description
B201 Brake Control Brake Pedal Position Sensor The sensor B201 contains 2 sensors in one assembly.
K177 Brake Booster Control Module The K177 Brake Booster Control Module assembly contains the control module and motor.