Glossary: Engine Blocks and Cylinder Heads

Software that identifies fault codes and ensures that emissions systems are operating correctly.

Self-diagnostic systems used by ECUs to check whether input and output signals are correct and to determine whether the system is operating as expected.

Gasoline additives that increase the auto-ignition temperature of the gasoline.

A measurement of the ignition characteristics of gasoline.

Procedures to isolate a fault based on fault code information, including retrieving fault code information, monitoring system operation, performing actuator tests and pinpoint electrical tests, and inspecting components.

A component that supplies oil through the top of the injectors and eliminates the problem with O-ring leakage when oil is supplied though the cylinder head.

An electric device that measures the amount of soot loading in engine oil.

A Cummins service program for scheduled oil sampling.

Self-diagnostic capabilities built into engine control units that allow them to evaluate the voltage and current levels to which they are connected and to determine whether data is in the correct operational range.

A feature incorporating GPS signal data and topographical maps to identify a highway on-ramp and increase engine torque, which improves vehicle acceleration for safer on-highway entry.