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Home >> Chevrolet >> 2019 >> Bolt EV Premier >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Keyless Entry System And Remote Function) >> Diagnostic Information and Procedures >> DTC B3123 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2018 Chevrolet Bolt EV. However, it is still accessible from the selected car via links, so may be relevant.

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

Circuit Description
Serial Data Digitally encoded information for communication between devices.
Low Reference circuit Grounded through the control module.
Component Description
K9 Body Control Module Depending on the version, the control module can support different functions:
  • Immobilizer Function
  • Central Door Locking
  • Power Mode Control
  • Ignition Key/Shifter Interlock

The control module also reads various switches and sensors and makes their values available via serial data.
K77 Remote Control Door Lock Receiver Remote Control Door Lock Receiver