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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 277 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0010 To DTC P0119 (LF4)) >> Diagnostic Information and Procedures >> DTC P00E9: Intake Air Temperature (IAT) Sensor 3 Performance >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Multifunction Intake Air Sensor - IAT Sensor 1

  1. Ignition OFF, disconnect the harness connector at the B75C Multifunction Intake Air sensor.
    2. NOTE:

    A thermometer can be used to test the sensor off the vehicle.

  2. Test the IAT sensor 1 by varying the sensor temperature while monitoring the sensor resistance.
  3. Verify the resistance values are in the range specified in the Temperature Versus Resistance - Intake Air Temperature Sensor (Hitachi Sensor)Temperature Versus Resistance - Intake Air Temperature Sensor (Delco Sensor) table for Hitatchi sensors.
    • If not within the specified range. 

      Replace the B75C Multifunction Intake Air sensor.

    • If within the specified range. 
  4. All OK

Multifunction Intake Air Sensor - IAT Sensor 2

  1. Test the IAT Sensor 2 by varying the sensor temperature while monitoring the air temperature with a thermometer. Compare the readings with the scan tool IAT Sensor 2 parameter.
  2. Verify the values are within 5 %
    • If not within 5% 

      Replace the B75C Multifunction Intake Air sensor.

    • If within 5% 
  3. All OK.

Turbocharger Boost/Intake Air Temperature sensor (IAT Sensor 3)

  1. Ignition OFF, disconnect the harness connector at the B111B Turbocharger Boost/Intake Air Temperature sensor (IAT Sensor 3).
    2. NOTE:

    A thermometer can be used to monitor the air temperature while testing the sensor off the vehicle.

  2. Test the IAT sensor 3 by varying the sensor temperature while monitoring the sensor resistance.
  3. Verifty the resistance values are in the range specified Temperature Versus Resistance - Intake Air Temperature Sensor (Hitachi Sensor)Temperature Versus Resistance - Intake Air Temperature Sensor (Delco Sensor) table for Delco Sensors.in the
    • If not within the specified range 

      Replace the B111B Turbocharger Boost/Intake Air Temperature sensor.

    • If within the specified range 
  4. All OK.
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