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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016 - P049D)) >> Diagnostic Information And Procedures >> DTC P0046, P2598, Or P2599: Turbocharger Boost Control Position Performance >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition/Vehicle - Off
  2. Disconnect the component: Vacuum Hose @ Turbocharger Wastegate Actuator Vacuum Source Tube - Hose/line going to the component: Turbocharger Wastegate Actuator - Above: Q14 Exhaust Gas Recirculation Valve
  3. Install the special tool: EN-23738-A Vacuum Pump - Turbocharger Wastegate Actuator Vacuum Source Tube - Hose/line going to the component: Q41 Turbocharger Vane Position Control Solenoid Valve
  4. Engine - Idling
  5. Perform the scan tool control function: Turbocharger Vane Position Actuator - 80%
  6. Verify the special tool reading: Greater than -60 kPa (-8.7 PSI)
    • If -60 kPa (-8.7 PSI) or less 

      Test or replace the component: Q41 Turbocharger Vane Position Control Solenoid Valve

    • Go to next step: If greater than -60 kPa (-8.7 PSI) 
  7. Perform the scan tool control function: Turbocharger Vane Position Actuator - 20%
  8. Verify the special tool reading: Less than -10 kPa (-1.5 PSI)
    • If -10 kPa (-1.5 PSI) or greater 

      Test or replace the component: Q41 Turbocharger Vane Position Control Solenoid Valve

    • Go to next step: If less than -10 kPa (-1.5 PSI) 
  9. Ignition/Vehicle - Off
  10. Install the special tool: EN-23738-A Vacuum Pump - Turbocharger Wastegate Actuator Vacuum Source Tube - Hose/line going to the component: Turbocharger Vane Position Actuator - B112 Turbocharger Vane Position Sensor
  11. Ignition - On/Vehicle - In Service Mode
  12. Use the special tool: EN-23738-A Vacuum Pump -58 kPa (-0.5 bar, -8.4 PSI) can be achieved and holds steady for 2 min.

    Perform the following action:

    • Verify the control rod of the vacuum actuator moves smoothly over the full range.
    • Verify the scan tool parameter: Turbocharger Vane Position Sensor = 100%
    • If not the specified values 
    1. Ignition/Vehicle - Off
    2. Test or inspect for the following: Turbocharger Wastegate Actuator Vacuum Source Tube - Vacuum hoses with kinks, leaks, or improper connections.
      • If a condition exists - Repair or replace as necessary
      • If no condition exists - Test or replace the component: Turbocharger Vane Position Actuator
    • Go to next step: If the specified values 
  13. Test or replace the component: Q41 Turbocharger Vane Position Control Solenoid Valve
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