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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B3978-B3982 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Programming and Setup procedure for the control module that set the DTC.
  2. Verify the DTC does not set after programming.
    • If the DTC sets after programming 

      Replace the control module that set the DTC.

    • Go to next step: If the DTC does not set after programming 
  3. All OK.
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