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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0010-P0446)) >> Diagnostic Information and Procedures >> DTC P0097-P0099 or P00F4-P00F6 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Circuit/System Testing must be performed before proceeding with Component Testing.

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B75C Multifunction Intake Air Sensor
  3. Install the special tool: EL-38522 Variable Signal Generator
    • Black lead @ Ground
    • Battery Cable Clip @ Battery
    • Red lead @ Signal circuit terminal 8
    • Set the voltage to 5 V
    • Set the frequency to 250 Hz
    • Set the duty cycle to 50%
  4. Ignition - On / Vehicle - In Service Mode
  5. Verify the scan tool parameter:
    • IAT Sensor 2 = 248 to 252 Hz
    • IAT Sensor 2 = 70 to 76°C (160 to 166°F)
    • Intake Air Humidity Sensor = 48 to 52%
    • If not in the specified range or does not change 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: X1 @ K20 Engine Control Module
    3. Test for less than 2 ohms between the test points: Signal circuit terminal 8 @ B75C Multifunction Intake Air Sensor & Circuit terminal 60 X1 @ K20 Engine Control Module
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: K20 Engine Control Module
    • Go to next step: If in the specified range and changes 
  6. Replace the component: B75C Multifunction Intake Air Sensor
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