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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 >> Reductant Injection Quantity Test >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    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 colder 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.
    • The NOx Catalyst Reductant-Load Adaptive Value can affect the quantity of reductant in the Reductant Injector Quantity Test. To reset this value and ensure the accuracy of the test, the scan tool NOx Catalyst Reductant Loading Reset must be performed prior to performing this test.
    • Once the injector begins cycling, the Reductant Quantity Test takes approximately 5 minutes to run and the ECM will end the test after approximately 14 minutes.
  1. Perform the scan tool NOx Catalyst Reductant Loading Reset
    2. NOTE:

    The gasket for the Q61 Emission Reduction Fluid Injector must be replaced when the injector is removed from the exhaust pipe.

  2. Remove the Q61 Emission Reduction Fluid Injector from the exhaust leaving the harness connector and reductant line connected.
  3. Position the Q61 Emission Reduction Fluid Injector nozzle towards one of the graduated scale container from the EN 50422  .
    4. NOTE:

    It may take up to two minutes for the injector to begin cycling.

  4. Command the Reductant Quantity Test On with a scan tool. Observe the injector spray pattern. 3 individual streams and atomization or mist of reductant should be observed.
    • If the function does not perform as specified 
    1. Inspect the Q61 Emission Reduction Fluid 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
    • Go to next step: If the function performs as specified 
  5. When the test completes, verify an injector flow of between 40 and 50 ml of fluid into the container.
    • If not between 40 and 50 ml 
    1. Disconnect the Q61 Emission Reduction Fluid Injector from the supply line.
    2. Position the Q61 Emission Reduction Fluid Injector supply line towards the graduated scale container.
      3. NOTE:

      The Reductant Injection Quantity Test runs for approximately 5 minutes when turned on and cannot be stopped with the scan tool. The step below is performed using the scan tool Reductant System Leak Test control function.

    4. Command the Reductant System Leak Test On with a scan tool.
    5. Command the Reductant System Leak Test Off when the supply line has flowed 40 ml.
    6. Verify 40 ml has flowed within 1 minute.
      • If not the specified value
      1. Inspect the Q61 Emission Reduction Fluid Injector supply line for damage or restrictions.
        • If a condition is found, repair or replace as necessary.
        • If no condition is found, replace the A38 Emission Reduction Fluid Supply Pump Module
      • If the specified value
    7. Replace the Q61 Emission Reduction Fluid Injector.
    • Go to next step: If between 40 and 50 ml 
  6. Return to referring document.
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