Actron CP9175 OBD II AutoScanner - Manual (Page 52)

A-4
Drive Cycle:
Vehicle operation for a period of time so the systems can be monitored.
DTC:
Diagnostic Trouble Code. An alphanumeric identifier for a fault
condition identified by the On Board Diagnostic System.
Duty Cycle:
A term applied to signals that switch between “on” and “off”. Duty cycle
is the percentage of time the signal is “on”. For example, if the signal
is “on” only one fourth of the time, then the duty cycle is 25%. The PCM
uses duty cycle type signals to maintain precise control of an actuator.
EBCM:
Electronic Brake Control Module.
EBTCM:
Electronic Brake/Traction Control Module.
ECM
Engine Control Module or Electronic Control Module.
ECT:
Engine Coolant Temperature sensor. See CTS.
EEPROM:
Electrically Erasable Programmable Read Only Memory.
EFE:
Early Fuel Evaporation.
EFI:
Electronic Fuel Injection. Any system where a computer controls fuel
delivery to the engine by using fuel injectors.
EGR:
Exhaust Gas Recirculation. The PCM uses the EGR system to
recirculate exhaust gases back into the intake manifold to reduce
emissions. EGR is used only during warm engine cruise conditions.
EOP:
Engine Oil Pressure (Switch.)
EOT
Engine Oil Temperature (Sensor.)
EPA:
Environmental Protection Agency.
ESC:
Electronic Spark Control. An ignition system function that warns the
PCM when “knock” is detected. The PCM will then retard spark timing
to eliminate the knocking condition.