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Home >> Cadillac >> 2017 >> CTS Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (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

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  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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