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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B1370-B1379, B1380-B1389, or B1440-B1443: Control Module Ignition >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC U1814 is not set.
    • If DTC is not set 
  3. Verify the scan tool power mode parameters change when cycling the S39 Ignition Switch between OFF, ACCESSORY, ON, and CRANK.
    • If the power mode parameters do not change 

      Refer to Circuit/System Testing.

    • If the power mode parameters change 
  4. All OK.
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