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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P2122 To DTC P2689 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Reductant Injection Quantity Test >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Remove the Q61 Emission Reduction Fluid Injector from the exhaust leaving the harness connector and reductant line connected.
    WARNING: Diesel Exhaust Fluid (DEF) is corrosive. Do not allow it to come in contact with your skin, eyes or the finished surfaces of the vehicle. If exposed, it may cause skin and eye irritation. Wear skin and eye protection when handling. Inhalation may cause irritation to the upper respiratory tract. Store in a cool, well-ventilated area. For more safety information, see the label of the Diesel Exhaust Fluid container. Failure to follow this procedure may result in injury and/or vehicle damage. 
    NOTE:
    • Do not perform this diagnostic procedure unless you were sent here from another diagnostic procedure.
    • Do not perform the Reductant Quantity Test if the reductant temperature is less than -7°C (19.5°F).
    • The Reductant Quantity Test may need to be run multiple times to dissolve crystallized reductant and to restore proper flow pattern.
    • Once the injector begins cycling, the Reductant Quantity Test takes approximately 2 minutes to run and the ECM will end the test after approximately 145 s.
  2. Command the Reductant Injection Quantity Test On with a scan tool. While pointing the injector towards a shop towel or large container, observe the injector spray pattern. Three individual streams and atomization or mist of reductant should be observed.
    NOTE: It may take up to two minutes for the injector to begin cycling.
    • If the function does not perform as specified 

      Inspect the injector lines for damage or restrictions or for being plugged.

    • If a condition is found, repair as necessary
    • If no condition is found, replace the Q61 Emission Reduction Fluid Injector
    • If the function performs as specified 
  3. Position the injector nozzle towards one of the graduated scale container from the J 45873  Fuel Return Volume Test Kit.
  4. Command the Reductant Injection Quantity Test On with a scan tool. The injector should flow at least 25 ml.
    • If not at least 25 ml 
    1. Disconnect the injector from the supply line.
    2. Position the injector supply line towards the graduated scale container.
    3. Command the Reductant Injection Quantity Test On with a scan tool. The supply line should flow greater than 30 ml.
    • If 30 ml or less, inspect the supply line for damage or restrictions.
    • If greater than 30 ml, replace the Q 61 Emission Reduction Fluid Injector.
    • If at least 25 ml 
  5. Return to referring document.
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