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Home >> Mazda >> 2003 >> 6 i, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls [Self-Diagnostics 2.3L] >> Diagnostic Tests >> DTC P0111: Mass Airflow/Intake Air Temperature Sensor Circuit - Performance Problem >> Diagnostic Condition

Diagnostic Condition

  1. If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
  2. Verify Related Repair Information Availability -  Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
  3. Inspect MAF/IAT Sensor Connector For Poor Connection -  Turn ignition off. Disconnect MAF/IAT sensor 5-pin harness connector. See Figure. Inspect for poor connection (such as damaged, pulled-out pins, corrosion). If malfunction is not detected, go to next step. If any malfunctions are present, repair or replace terminal. After repair, go to step  6.
  4. Inspect PCM Connector For Poor Connection -  Turn ignition off. Verify PCM 30-pin harness connectors are connected securely. If connections are okay, go to next step. If loose connections are present, reconnect harness connectors securely. After repair, go to step  6.
  5. Inspect MAF/IAT Sensor -  Inspect MAF/IAT sensor. See INTAKE AIR TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If MAF/IAT sensor is okay, go to next step. If MAF/IAT sensor is faulty, replace MAF/IAT sensor. After repair, go to next step.
  6. Verify Trouble Shooting Of DTC P0111 Is Completed -  Make sure to reconnect all disconnected connectors. Clear DTC from PCM memory using WDS or equivalent. Turn ignition off. Start engine and warm it up completely. If PENDING CODE of same DTC is not present, go to next step. If PENDING CODE of same DTC is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. After repair, go to next step.
  7. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.
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