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Home >> Saturn >> 2009 >> Sky Red Line, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L - DTC P0010 To DTC P0238 >> DTC P0234 or P0299 >> Circuit/System Verification

Circuit/System Verification

  1. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust .
  2. If DTC P0299 is set, verify the proper operation of the charge air bypass valve. Refer to Turbocharger Cleaning and Inspection .
  3. Use the scan tool output controls to command the TC Bypass Solenoid ON and OFF. An audible click should be heard and felt.
  4. Use the scan tool output controls to command the TC Wastegate Solenoid ON and OFF. An audible series of clicks should be heard and felt between 20-90 percent.
  5. Determine the current vehicle testing altitude. Ignition ON, observe the scan tool MAP Sensor parameter, the Boost Pressure Sensor parameter, and the BARO Sensor parameter. Compare the parameters to each other and to the Altitude Versus Barometric Pressure table.
  6. Use the scan tool and compare the MAP Sensor parameter to the Boost Pressure Sensor parameter during a WOT acceleration at the time of the 1-2 shift. The readings should be within 20 kPa of each other.
  7. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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