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Home >> Mazda >> 2012 >> CX-7 s Touring, 2.3L Eng VIN L, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine Control System 2.3L L3 With TC] >> Engine Control System Operation 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:
      • Wiring harness and connectors (Wastegate control solenoid valve-PCM terminal 2AA)
      • Wastegate control solenoid valve (stuck open)
  4. Warm up the engine to normal operating temperature.
  5. Connect the M-MDS to the DLC-2 and verify that DTC P0245:00 or P0246:00 are shown. Perform the DTC inspection. (See DTC P0245:00 .) (See DTC P0246:00 .)
  6. Select the WGC PID.
  7. Increase the duty value of the wastegate control solenoid valve 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, perform the wastegate control solenoid valve inspection. (See WASTEGATE CONTROL SOLENOID VALVE INSPECTION .)
  8. Warm up the engine to normal operating temperature.
  9. Monitor the WGC and APP PIDs using the M-MDS.
  10. Run the engine with the APP PID above 30%  and verify that the WGC PID value increases from 0%  .
    • If the WGC PID is 0%  , inspect the APP PID.

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:
      • Wiring harness and connectors (Wastegate control solenoid valve-PCM terminal 2AA)
      • Wastegate control solenoid valve (stuck open)
  4. Warm up the engine to normal operating temperature.
  5. Connect the M-MDS to the DLC-2 and verify that the DTC P0245:00 or P0246:00 are shown. Perform the DTC inspection. (See DTC P0245:00 .) (See DTC P0246:00 .)
  6. Warm up the engine to normal operating temperature.
  7. Monitor the WGC and APP PIDs using the M-MDS.
  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.
    • If there is no pressure applied, inspect for the following:
      • Wastegate control solenoid valve (stuck closed)
      • Hose connection (Intake hose (turbocharger compressor downstream side)-Wastegate actuator-Intake hose (turbocharger compressor upstream side))
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