Emission Reduction Fluid Pump Priming
WARNING: This page is about a different variant/trim than selected.
CAUTION:
The diesel exhaust fluid (DEF) system is part of the emission system for this vehicle, and must be serviced while observing extreme care to prevent foreign contamination of any kind from entering this system. If extreme care is NOT taken to prevent contamination from dirt, debris, fluids other than DEF, etc., reduced performance and/or damage to the DEF system may result.
- Cleanliness of the diesel exhaust fluid (DEF) system is crucial to ensure proper operation. Before opening any part of the DEF system, ensure connections and joints are thoroughly clean and dry of any dirt, debris, or other contaminants. Use only low pressure water and low pressure air, as directed.
- Diesel exhaust fluid (DEF) will have a tendency over time to develop areas of dried crystallization residue. Crystallization residue is a normal process for this fluid. Dried DEF crystallization residue can be wiped away, or flushed away with clean water, depending on location of the crystallization.
- Ignition On, verify that no other reductant system DTCs are set. If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify that the scan tool Reductant Tank Level status parameter displays Full or OK. If it does not display Full or Ok, add 4 liters (1.1 gal) reductant fluid and verify the parameter displays Full or OK.
- Disconnect the emission reduction fluid exhaust front pipe injector supply pipe at the reductant fluid injector and direct into a suitable container. Plastic Collar Quick Connect Fitting Service
- Commanded the Reductant System Leak Test On with a scan tool.
- Observe fluid being pumped out of the Reductant Tank.
- Connect the emission reduction fluid exhaust front pipe injector supply pipe at the reductant fluid injector. Plastic Collar Quick Connect Fitting Service
- Commanded the Reductant System Leak Test On with a scan tool.
- With Ignition ON, engine OFF, verify that "Reductant Pressure" reaches approximately 500 kPa. Verify DTC does not set.
- Command all 3 Reductant heaters ON using a scan tool.
- Move vehicle outside, perform Reductant System Malfunction Warning Service Bay Test.
- Verify test passes and warning message on Driver Information Center disappears.
- If test does not pass, shut off engine and allow engine control module to completely go to sleep 10 minutes, then repeat the Reductant System Malfunction Warning Service Bay Test.