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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P20F8: Intake Manifold Runner Control Valve Control Circuit Performance >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify DTC P2008, P2009, P2010, P2015, P2016, P2017 is not set.
  3. Perform the scan tool control function: Intake Manifold Runner Control Valve - Increase

    Verify the scan tool parameter:

    • Intake Manifold Runner Control Valve Control Circuit High Voltage Test Status = OK or Not Run
    • Intake Manifold Runner Control Valve Control Circuit Open Test Status = OK or Not Run
    • Intake Manifold Runner Control Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  4. Perform the scan tool control function: Intake Manifold Runner Control Valve - Increase & Decrease - 30 to 80%

    Verify the scan tool parameter: Intake Manifold Runner Control Valve Feedback Signal = Intake Manifold Runner Control Valve Command

    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  6. All OK.