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Home >> Mazda >> 2003 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0111: Intake Air Temperature Circuit - Performance Problem >> Diagnostic Procedures

Diagnostic Procedures

  1. Record freeze frame data. Check for service bulletins and on-line information. Repair as necessary. After repair, go to next step.
  2. Inspect Poor Connection Of MAF/IAT Sensor Connector -  Turn ignition off. Disconnect MAF/IAT sensor 6-pin harness connector. Check for damaged, loose or corroded terminals. If problem is not present, go to next step. If problem is present, repair as necessary. After repair, go to step  5.
  3. Inspect MAF/IAT Sensor -  Measure resistance between MAF/IAT sensor terminals "A" and "F". See Figure. If resistance is 550 ohms or more, go to next step. If resistance is not as specified, replace MAF/IAT sensor. After repair, go to step  5.
  4. Inspect Poor Connection Of PCM Connector -  Disconnect PCM 104-pin harness connector. Check for damaged, loose or corroded terminals. If problem is not present, go to next step. If problem is present, repair as necessary. After repair, go to next step.
  5. Verify Trouble Shooting Of DTC P0111 Completed -  Reconnect all components. Turn ignition on, engine off. Using scan tool, clear DTC. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Start engine. Select FREEZE FRAME DATA. Recheck DTCs. If DTC P0111 is present, replace PCM. After repair, go to next step. If DTC P0111 is not present, go to next step.
  6. Verify After Repair Procedure -  Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If no other DTCs are present, testing is complete. If any other DTC is present, go to applicable test and repair.
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