LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 2.0L (LTG) - Diagnostic Information And Procedures (P0335 - P26C8) And Symptoms) >> Diagnostic Information And Procedures >> DTC P2199: Intake Air Temperature (IAT) Sensor 1-2 Not Plausible >> Component Testing >> Testing with EL-38522-A

Testing with EL-38522-A

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

    In-correct diagnosis will result if Circuit/System Testing is not completed before performing the following test.

  1. Perform the following test using a EL-38522-A  Variable Signal Generator or equivalent, if available.
  2. Ignition Off, connect the leads of the EL-38522-A  Variable Signal Generator as follows:
    1. Red lead to the signal circuit terminal 8 at the harness connector
    2. Black leads to ground
    3. Battery voltage supply lead to B+
  3. Set the EL-38522-A  Variable Signal Generator to the following specifications.
    • Signal switch to 5 V
    • Duty Cycle switch to 50 % (Normal)
    • Frequency switch to 250 Hz
  4. Ignition On.
  5. Verify the scan tool IAT Sensor 2 parameters listed below are within the ranges listed below:
    • IAT Sensor 2 is between 248 - 252 Hz
      • NOTE:

      Changing the frequency should cause a warmer or colder IAT 2 temperature.

    • IAT Sensor 2 is between 70 - 76°C (160 - 166°F)
      • NOTE:

      Increasing or decreasing the duty cycle should have an inverse affect on humidity.

    • Intake Air Humidity Sensor is between 48 - 52%
    • If a parameter is not within the specified range 

      Replace the K20 Engine Control Module.

    • Go to next step: If all the parameters are within the specified range 
  6. All OK.
scientia non olet · About LEMON Manuals