Cruze

DTC B389A

When certain modules are programmed and configured during installation, the module learns a specific immobiliser identifier which is unique to the vehicle. The immobiliser identifier is used to prevent swapping modules between vehicles. The body control module (BCM) is the keeper of the environment identifier. The instrument cluster, electronic brake control module (EBCM), HVAC control module, inflatable restraint sensing and diagnostic module (SDM), engine control module (ECM) and steering column lock control module, if equipped, each learn the immobiliser identifier during their configuration process. During vehicle operation, each of these modules compare their immobiliser identifier to the BCM. If the identifiers match, vehicle starting is allowed. If an immobiliser identifier does not match, vehicle starting is disabled.

Ignition is in the Accessory or Run position.

An incorrect environment identifier is received by the BCM.

A current DTC will be cleared when the module learns an environment identifier.

Schematic Reference

Theft Deterrent System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Content Theft Deterrent (CTD) Description and Operation

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Note: Make sure to fix DTC B3902 first that has set in the following modules, Instrument Panel Cluster, SDM, ECM, HVAC, EBCM and steering column lock control module (if equipped) before proceeding to the following diagnosis regarding the BCM.

Perform the Programming and Set-up procedure for the K9 Body Control Module. Verify the DTC does not reset after programming.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming