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Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Engine Control System & Fuel System - 2.8L, 3.0L - DTC P0008 To DTC P0118) >> DTC P0033-P0035 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the Q40 turbocharger bypass solenoid valve.
  2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
  3. Connect a test lamp between the control circuit terminal 2 and the ignition circuit terminal 1.
    4. NOTE: If any Turbocharger circuit DTC is set, the Bypass Solenoid Valve output control may not function. It may be necessary to clear the DTCs with a scan tool to enable the output control.
  4. Command the Turbocharger Bypass Solenoid Valve between Inactive and Active with a scan tool, then select exit. The test lamp should illuminate and then go OFF.
    • If the test lamp is always ON, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K20 ECM.
    • If the test lamp is always OFF, test the control circuit terminal 2 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
  5. Test for 2.6-4.6 V between the control circuit terminal 2 and ground.
    • If the voltage is not within the specified range, replace the K20 ECM.
  6. If all circuits test normal, test or replace the Q40 turbocharger bypass solenoid valve.
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