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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Cooling Systems >> Hybrid/EV Cooling System >> Diagnostic Information and Procedures >> Generator Control Module Coolant Pump Malfunction - DTC P0CC1-P0CC4 >> Circuit/System Verification

Circuit/System Verification

  1. Verify the coolant level of the starter/generator cooling system is normal.
    • If the coolant level is low 

      Inspect the starter/generator cooling system for any leaks.

    • If the coolant level is normal 
  2. Verify the starter/generator cooling system auxiliary radiator is clear of any debris, bent fins, or other damage which may inhibit airflow.
    • If debris are found 

      Clean the auxiliary radiator.

    • If damage is found 

      Replace the auxiliary radiator.

    • If the coolant level is normal 
  3. Verify the starter/generator cooling system hoses are properly routed and are not kinked.
    • If any hoses are improperly routed or kinked 

      Removed and properly route the hose.

    • If all hoses are routed properly and are not kinked 
  4. Ignition ON.
  5. Verify the G22 starter/generator control module coolant pump turns ON and OFF when commanding the Motor Coolant Pump Relay Enable ON and OFF with a scan tool. The G22 starter/generator control module coolant pump will make an audible noise during operation.
    • If the G22 starter/generator control module coolant pump does not turn ON and OFF 

      Refer to Circuit/System Testing .

    • If the G22 starter/generator control module coolant pump turns ON and OFF 
  6. All OK.
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