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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0016 To DTC P0406) >> Diagnostic Information and Procedures >> DTC P0201-P0204: Cylinder Injector Control Circuit >> Circuit/System Testing

Circuit/System Testing

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

Before working on any high voltage fuel injection system, be aware of the following procedures:

  • Do not make contact with the fuel injection harness, engine control module (ECM) or fuel injectors while the ignition is ON or RUN positions.
  • Wait 5 minutes after key OFF to allow the electronic control module (ECM) to discharge before attempting to disconnect or test engine control components.
  • Do not use the electronic control module (ECM) case as a ground while jump starting.

Failure to follow the procedure exactly as written may result in serious injury or death.

NOTE: If you cannot duplicate the condition, 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.
  1. Ignition OFF.
  2. Disconnect the X2 harness connector at the K20 Engine Control Module.
  3. Disconnect the harness connector at the appropriate Q17 Fuel Injector.
  4. Test for less than 5 Ω in the appropriate Fuel Injector High Voltage Supply circuits listed below.
    • Injector 1 terminal 2 and the ECM connector X2-1
    • Injector 2 terminal 2 and ECM connector X2-74
    • Injector 3 terminal 2 and the ECM connector X2-73
    • Injector 4 terminal 2 and the ECM connector X2-2
    • If greater than 5 Ω 

      Repair the open/high resistance in the appropriate Fuel Injector High Voltage Supply circuit.

    • If less than 5 Ω 
  5. Test for less than 5 Ω in the appropriate Fuel Injector High Voltage Control circuits listed below.
    • Injector 1 terminal 1 and the ECM connector X2-25
    • Injector 2 terminal 1 and ECM connector X2-50
    • Injector 3 terminal 1 and the ECM connector X2-49
    • Injector 4 terminal 1 and the ECM connector X2-26
    • If greater than 5 Ω 

      Repair the open/high resistance in the appropriate Fuel Injector High Voltage Control circuit.

    • If less than 5 Ω 
  6. Test for 150-210 kΩ between terminal 1 and terminal 2 of the appropriate Q17 Fuel Injector.
    • If not between 150 and 210 kΩ 

      Replace the appropriate Q17 Fuel Injector.

    • If between 150 and 210 kΩ 
  7. Test for infinite resistance between each terminal and the Q17 Fuel Injector housing/case.
    • If resistance is not infinite 

      Replace the Q17 Fuel Injector.

    • If resistance is infinite 
  8. Replace the K20 Engine Control Module.
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