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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Locks And Vehicle Access - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC B1C57 >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Liftgate Description and Operation

Circuit Description
5 V Reference Regulated voltage supplied by the control module.
Low Reference Grounded through the control module.
Component Description
M31L Liftgate Power Assist Actuator - Left
  • The motor M125 is a bidirectional DC motor that moves the component: Liftgate
  • The assembly also contains a 4-wire hall effect current sensor.
  • When the sensor measures increased electrical current, the control module can detect that the component has reached an endstop.
K194 Rear Gate Module The control module K194 controls the component: M31L Liftgate Power Assist Actuator - Left
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