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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P305F: Dual Battery Control Module Performance >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2016 Chevrolet Malibu Limited. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON
  2. Using the Graphical Data Display in the scan tool, verify the ECM Ignition 1 Signal is 8.9 V or greater during ignition CRANK
    • If Ignition 1 Signal is below 8.9 V 
    1. Verify that there is no excessive parasitic current drain, refer to Battery Electrical Drain/Parasitic Load Test .
      • If there is excessive parasitic current drain, determine cause of the excessive parasitic current drain.
      • If there is no excessive parasitic current drain, refer to Circuit/System Testing.
    • If Ignition 1 Signal is 8.9 V or greater 
  3. All OK.