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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (P0351 - P26C8) And Symptoms) >> Diagnostic Information And Procedures >> DTC P2199: Intake Air Temperature (IAT) Sensor 1-2 Not Plausible >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Multifunction Intake Air Sensor

  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. Compare the readings with the Temperature Versus Resistance - Intake Air Temperature Sensor (Hitachi Sensor)Temperature Versus Resistance - Intake Air Temperature Sensor (Delco Sensor) table for Hitachi Sensors. The resistance values should be in range of the table values.
    • If not within the specified range 

      Replace the B75C Multifunction Intake Air Sensor.

    • Go to next step: If within the specified range 
  3. All OK.

Multifunction Intake Air Sensor

  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. The values should be within 5%.
    • If not within the specified range 

      Replace the B75C Multifunction Intake Air Sensor.

    • Go to next step: If within the specified range 
  2. All OK.
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