This course covers the Cummins 5.9 & 6.7 Diesel Engines where performance problems are common. Technicians have reported that these vehicles are difficult to repair and that information is hard to find or is inaccurate.

This class will supply you with the "Real World' operational knowledge to diagnose Cummins diesels with OBD-II electronic controls. Learn how the Cummins engine handles OBD-II requirements for fuel control and emissions. Information like the injectors using two drivers and not just one as the gasoline engine does is critical when diagnosing emission or drivability concerns. Service information, schematics, and scan data will be used to help the technician diagnose these vehicles in the service bay the next day.

Learn from an ATA expert to quickly and efficiently diagnose and repair the unique electronic engine control.

• Compression Ignition
• Water/fuel separator and WIF sensor
• Intake air heaters operation
• Fuel filtration and fuel heater operation
• The High-Pressure Common Rail (HPCR) system
• High and Low Pressure Fuel systems
• Fuel control actuator and fuel rail pressure sensor
• Fuel Rail Pressure Limiting Valve and Overflow valve
• Fuel injector control for pilot, main, and post injector events
• Programming the fuel injector codes into the computer
• Charge Air Cooler (CAC)
• EGR Airflow Throttle Control Valve
• Exhaust Gas Recirculation Valve (EGR), EGR cooler/cooler by-pass
• Turbochargers and Wastegate operation
• Exhaust Brake
• New Exhaust After-treatment Systems
• Diesel Particulate Filter (DPF)


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