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Home >> Chevrolet >> 2021 >> Malibu LT >> Repair and Diagnosis >> Engine Mechanical >> Starter >> 12 V Starting And Charging - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC P0622 >> Circuit/System Verification

Circuit/System Verification

  1. Engine Running
  2. Verify the scan tool parameter: Generator F-Terminal Signal = If between 5 and 90%
    • If not between 5 and 90% 
  3. Refer to: Circuit/System Testing
    • Go to next step: If between 5 and 90% 
  4. Verify the scan tool parameter: - Generator F-Terminal Signal - The parameter changes as commanded with the scan tool. - Turn the headlamps ON. & Turn the headlamps OFF.
    • If the parameter value does not change 
  5. Refer to: Circuit/System Testing
    • Go to next step: If the parameter value changes 
  6. 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.
  7. Verify the DTC does not set.
    • If the DTC sets 
  8. Refer to: Circuit/System Testing
    • Go to next step: If the DTC does not set 
  9. All OK.
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