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Home >> Mazda >> 2011 >> CX-9 Touring, 3.7 V, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [MZI-3.7] >> Intake Air Temperature (IAT) Sensor Inspection >> Resistance Inspection
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Resistance Inspection

  1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
  2. Disconnect the MAF/IAT sensor connector.
  3. Measure the resistance between MAF/IAT sensor terminals A and F.
    • If not within the specification, replace the MAF/IAT sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION .)
    • If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection".
      Fig 1: Identifying Intake Air Temperature (IAT) Sensor Connector Terminals
      G00512262Courtesy of MAZDA MOTORS CORP.

    IAT sensor resistance 

    IAT SENSOR RESISTANCE CHART

    IAT (°C {°F}) Resistance (kilohm)
    10 {50} Approx. 58.75
    20 {68} Approx. 37.30
    30 {86} Approx. 24.27
    60 {140} Approx. 7.70

    IAT sensor characteristics graph (reference) 

    Fig 2: View Of IAT Sensor Characteristics Graph
    G04969689Courtesy of MAZDA MOTORS CORP.
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