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Home >> Cadillac >> 2017 >> CTS Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Starter >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P1065: Stop-Start Capacitor Control Module Charging Current Performance >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition OFF, measure and record the battery voltage at the battery terminals.
  2. Verify the battery voltage stabilizes between 12.4 and 12.8 V within a few minutes of turning the ignition OFF.
    • If battery voltage is between 12.4 and 12.8 V 
  3. Engine running, headlights ON, measure and record the battery voltage at the battery terminals.
  4. Verify the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V.
    • If the voltage is not at least 1 V greater than the voltage measured in step 1 or is greater than 15 V. 

      Refer to Charging System Test .

    • If the voltage is at least 1 V greater than the voltage measured in step 1, but less than 15 V. 
  5. Verify DTC P1065 does not set.
    • If the DTC is set 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK
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