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Home >> Mazda >> 2018 >> 3 Touring, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Intake Air Temperature (IAT) Sensor Inspection >> IAT Sensor No. 2 >> Resistance inspection

Resistance inspection

NOTE:
  • Because the IAT sensor No. 2 is integrated in the MAP sensor, replacing the IAT sensor No. 2 includes replacement of the MAP sensor/IAT sensor No. 2.
  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
  2. Disconnect the MAP sensor/IAT sensor No. 2 connector.
  3. Remove the MAP sensor/IAT sensor No. 2. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR No. 2 REMOVAL/INSTALLATION .)
  4. Measure the resistance between MAP sensor/IAT sensor No. 2 terminals A and B.
Fig 1: Locating MAP Sensor/IAT Sensor No. 2 Terminals A And B
G09785532Courtesy of MAZDA MOTORS CORP.

Specification (Reference) 

IAT (°C {°F}) Resistance (Kilohms)
0 {32} Approx. 5.9
20 {68} Approx. 2.5
80 {176} Approx. 0.323
130 {266} Approx. 0.0893
Fig 2: MAP Sensor/IAT Sensor No. 2 Resistance Graph
G11450616Courtesy of MAZDA MOTORS CORP.