2000 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0111: IAT Circuit Problem: Testing

NOTE: Ensure freeze frame data has been recorded. Check for service bulletins and on-line information.
  1. Disconnect MAF/IAT sensor. Check MAF/IAT sensor connector terminals. If connectors are okay, go to next step. If connectors are faulty, repair as necessary and go to step  4 .
  2. Check resistance between MAF/IAT sensor terminals "A" and "F". If resistance is 550 ohms or more, go to next step. If resistance is less than 550 ohms, replace MAF/IAT sensor and go to step  4 .
  3. Disconnect PCM connector. PCM is mounted to passenger floor, behind glove box. Check PCM terminals No. 39 and No. 91. If terminals are okay, go to next step. If any terminal is faulty, repair as necessary and go to next step.
  4. Reconnect all components. Turn ignition on. Using scan tool, clear DTC. Start engine. Using scan tool, select freeze frame data. Recheck DTCs. If DTC P0111 is pending, replace PCM and go to next step. If DTC P0111 is not pending, go to next step.
  5. Perform after repair procedure. See AFTER REPAIR PROCEDURE  . If no DTC is present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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