LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 278 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0117 (LGX) To DTC P0697) >> Diagnostic Information and Procedures >> DTC P0234, P0299, or P16E7: Engine Overboost/Engine Underboost/Turbocharger Bank 1-2 Boost Balance >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC P0033, P0034, P0035, P00C0, P00C1, P00C2, P0101, P0102, P0103, P010B, P010C, P010D P0236, P0237, P0238, P0243, P0245, P0246, P0247, P0249, or P0250 is not set.
    • If none of the DTCs are set 
  3. Verify the scan tool Barometric Pressure Sensor Bank 1 and Bank 2 parameters are within the range specified in the Altitude Versus Barometric Pressure table.
    • If both parameters are within the specified range 
  4. Verify the scan tool MAP Sensor and Barometric Pressure Sensor Bank 1 and Bank 2 parameters are within 3 kPa (0.4 psi).
    • If within 3 kPa (0.4 psi) 
  5. Verify the scan tool Boost Pressure Sensor and Barometric Pressure Sensor Bank 1 and Bank 2 parameters are within 3 kPa (0.4 psi).
    • If not within 3 kPa (0.4 psi) 

      Refer to DTC P0236 .

    • If within 3 kPa (0.4 psi) 
    6. NOTE:

    This step is intended to verify the electronic bypass solenoid valve operation.

  6. Verify a click is heard or felt from the corresponding Q40 Turbocharger Bypass Solenoid Valve when commanding the Turbocharger Bypass Solenoid Valve Bank 1 or Bank 2 between Active and Inactive with a scan tool.
    • If a click is not heard or felt 

      Refer to Circuit/System Testing.

    • If a click is heard or felt 
  7. Engine Idling.
    8. NOTE:

    This step is intended to verify the vacuum operated bypass valve operation.

  8. Verify a click is heard or felt from the corresponding turbocharger bypass valve when commanding the Turbocharger Bypass Solenoid Valve Bank 1 or Bank 2 between Active and Inactive with a scan tool.
    • If a click is not heard or felt 

      Refer to Circuit/System Testing.

    • If a click is heard or felt 
  9. 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.
  10. Verify a DTC does not set.
    • If a DTC sets 

      Refer to Circuit/System Testing.

    • If a DTC does not set 
  11. All OK
scientia non olet · About LEMON Manuals