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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 P0622: Generator F-Terminal >> 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.
NOTE: Do not have a battery charger connected during the generator testing.
  1. Engine running.
  2. Verify the scan tool Engine Control Module Generator F-Terminal Signal parameter is between 5-90%.
    • If not between 5-90% 

      Refer to Circuit/System Testing.

    • If between 5-90% 
  3. Verify the scan tool Generator F-Terminal Signal parameter changes when commanding the headlamps ON and OFF.
    • If the parameter does not change 

      Refer to Circuit/System Testing.

    • If the parameter changes 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK.
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