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Home >> Mazda >> 2011 >> 3 Mazdaspeed, 2.3 4 >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine Mechanical L3 With TC] >> Engine Control System Operation Inspection >> Drive-by-wire Control System Inspection >> Wastegate Control System Operation Inspection

Wastegate Control System Operation Inspection

If simulation function of M-MDS is used: 

  1. Start the engine and run it is idling.
  2. Disconnect the hose between the wastegate control solenoid valve and the intake pipe.
  3. Put a finger to the wastegate control solenoid valve and verify that there is no pressure applied.
    • If there is pressure, inspect the following:
  4. Warm up the engine to normal operating temperature.
  5. Verify that the DTC P0245:00 or P0246:00 are shown. (See ON-BOARD DIAGNOSTIC TEST ).
  6. Access the WGC PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ).
  7. Put a finger to the wastegate control solenoid valve with Step  2 condition and verify that there is vacuum applied when set the present to 100%  duty value of the wastegate control solenoid valve using the WGC PID simulation function.
    • If there is no vacuum, inspect the following:
      • Increase the duty value of the wastegate control solenoid valve using the WGC PID simulation function and inspect if the operation sound of the solenoid valve is heard.
    • If the operation sound is heard, inspect for loose or damaged vacuum hoses. (Wastegate actuator-Wastegate control solenoid valve-Intake hose)
    • If the operation sound is not heard, inspect the wastegate control solenoid valve. (See WASTEGATE CONTROL SOLENOID VALVE INSPECTION ).
  8. Warm up the engine to normal operating temperature.
  9. Access the WGC and APP PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ).
  10. Run the engine with the APP PID above 30%  and verify that the WGC PID value increases from 0%  .

If simulation function of M-MDS is not used: 

  1. Start the engine and run it is idling.
  2. Disconnect the hose between the wastegate control solenoid valve and the intake pipe.
  3. Put a finger to the wastegate control solenoid valve and verify that there is no pressure applied.
    • If there is pressure, inspect the following:
  4. Warm up the engine to normal operating temperature.
  5. Verify that the DTC P0245:00 or P0246:00 are shown. (See ON-BOARD DIAGNOSTIC TEST ).
  6. Warm up the engine to normal operating temperature.
  7. Access the WGC and APP PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ).
  8. The hose between the wastegate control solenoid valve and intake pipe is disconnected.
  9. Run the engine with the APP PID above 30%  and verify that the WGC PID value increases from 0%  and there is pressure applied.
    • If the WGC PID is 0%  , inspect the TP REL PID. (See PCM INSPECTION ).
    • If there is no pressure applied, inspect for the following:
      • Wastegate control solenoid valve (stuck closed) (See WASTEGATE CONTROL SOLENOID VALVE INSPECTION ).
      • Hose connection (Intake hose (turbocharger compressor downstream side)-Wastegate actuator-Intake hose (turbocharger compressor upstream side))
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