Engine Systems Diesel Exhaust Fluid System Anti-Tampering Feature Detroit Diesel Electronic Controls (DDEC ® ) monitors for faults in DEF system components and monitors the DEF supply pressure. If DDEC ® detects that components critical to the ATS or DEF supply system are disconnected (which could indicate tampering), or if the diagnostics detect abnormal system pressures indicative of DEF supply blockage, the warning indicator will illuminate and DDEC ® will initiate time and mileage counters. If the sensors detect that the ATS has been tampered with, the malfunction indicator illuminates to warn the driver, and the engine performance is limited, with a 90 km/h (55 mph) speed limit.
If the system fault is not corrected, the stop engine indicator illuminates and an 8 km/h (5 mph) speed limit will be applied. Similar warnings and penalties will result when insufficient DEF quantity is present. Diesel Exhaust Fluid Tank The DEF tank holds the DEF supply. The filler neck has a smaller diameter 19 mm (0.75 in.) than the filler neck of the diesel fuel tank and is fitted with a magnetic insert so that diesel fuel cannot be mistakenly added to the DEF tank. If diesel fuel is added to the DEF tank or DEF is added to the diesel fuel tank, immediately contact an authorized Detroit™ service outlet for further instructions.
Air System Air System On Detroit™ Gen 5 Heavy Duty engines, outside air enters the engine through the air filter and is drawn into the turbocharger where it is compressed. The compressed air is then forced through the charge air cooler (heat exchanger) where it is cooled. Next, cooled air flows to the intake manifold and into the cylinders, where the air mixes with atomized fuel from the fuel injectors. For optimum engine protection from dust and other airborne contaminants, service the dry-type air cleaners when the maximum allowable air restriction has been reached.
The air cleaner restriction indicator (filter minder) should be inspected per the maintenance intervals, Refer to section "Preventive Maintenance Tables", or more often if the engine is operated under severe dusty conditions. Replace the air filter if the filter minder has reached maximum allowable restriction. Do not allow the air inlet restriction to exceed maximum allowable restriction. Always use air filters that meet Detroit™ specifications. The use of air filters that do not meet Detroit™ specifications may result in premature wear or equipment failure. Cooling System 44 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217