2015 Jeep Grand Cherokee User Guide SRT - Page 182

DIESEL System Overview This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements. The DEF injection system consists of the following components: • DEF tank • DEF pump • DEF injector • Electronically-heated DEF lines • NOx sensors • Temperature sensors • SCR catalyst The DEF injection system and SCR catalyst enable the achievement of diesel emissions requirements; while maintaining outstanding fuel economy, drivability, torque and power ratings. NOTE: • Your vehicle is equipped with a DEF injection system. You may occasionally hear an audible clicking noise. This is normal operation. • The DEF pump will run for a period of time after engine shutdown to purge the DEF system. This is normal operation. Adding Diesel Exhaust Fluid The DEF gauge (located in the DID) will display the level of DEF remaining in the tank. Completely fill the DEF tank through the diesel exhaust fluid fill location (located behind the fuel door) at every maintenance interval or before if prompted by the Driver Information Display (DID). NOTE: • The gauge may take up to five seconds to update after adding a gallon or more of Diesel Exhaust Fluid (DEF) to the DEF tank. If you have a fault related to the DEF system, the gauge may not update to the new level. See your authorized dealer for service. • The DEF gauge may also not immediately update after a refill if the temperature of the DEF fluid is below 12F (-11C). The DEF line heater will possibly warm up the DEF fluid and allow the gauge to update after a period of run time. Under very cold conditions, it is possible that the gauge may not reflect the new fill level for several drives. 180