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Home >> Buick >> 2019 >> Regal Base >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P15A3 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON
  2. Verify with a scan tool that no DTC is set in the BCM.
    • Go to next step: If no DTC is set 
  3. Verify with a scan tool the Engine Control Module Stop/Start Mode parameter changes between Yes and No while pressing the S48E Multifunction Switch.
    • If the parameter does not change 

      Refer to Circuit/System Testing

    • Go to next step: If the parameter changes 
  4. All OK.
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