MACK and Volvo Diesel Exhaust Fluid (DEF) Dosing Valve Test checks to ensure the dosing system is operating properly. It can also be used after a dosing valve replacement to exit inducement mode and clear any related Diagnostic Troubleshooting Codes (DTC).
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DEF Dosing Valve Test is supported on:
✓ Mack and Volvo EPA 13 to GHG17 engines
This test will prime the DEF Dosing Valve and then inject the specified amount of DEF fluid into the measuring container over the specified time, allowing you to inspect the spray pattern and the DEF quantity. The amount of DEF measured when the test is completed will determine how to proceed with diagnostics or repairs.
1. Select the DEF Dosing Valve Test and press Enter or the Start button.
2. The Configure Monitored Data for DEF Dosing Valve Test will be displayed.
3. Select parameters from the Available list and click > Add > button to move them to the Selected list.
4. To remove parameters from the Selected list, highlight the parameter in the list and press the < Remove <button. The parameter will be returned to the Available list.
5. When you are done selecting parameters, then press the OK button, otherwise press the Cancel button to return to the test selection dialog.
6. The DEF Dosing Valve Test dialog displays, providing important information about steps to take before running the test.
7. Click the Next button for test Instructions.
8.Follow instructions concerning removing the DEF Dosing Valve.
9. Click the Next button to continue.
10. Ensure all preconditions are met and select the specific DEF Dosing Valve test to perform.
11. Click the Start button to begin the test, which can take several minutes to complete.
12. The dialog displays examples of correct and problem spray patterns that can be detected by observing the valve as it dispenses DEF into the collection container.
13. When the test is completed, results information is displayed, including steps to take depending on how much DEF was dispensed.
NOTE: If the test needs to be performed again, click the Test Selection button to return to the selection screen.
14. Once done, following instructions to ensure sufficient post ventilation of the dosing system and click the Exit button to return to the bi-directional test selection dialog.
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