Actron CP9175 OBD II AutoScanner - Manual (Page 51)

A-3
Closed Loop (CL):
A feedback system that uses the O2 Sensor(s) to monitor the results
of combustion. Based on the signal(s) from the O2 sensor(s), the PCM
modifies the air/fuel mixture to maintain optimum performance with
lowest emissions. In closed loop mode, the PCM can “fine tune” control
of a system to achieve an exact result.
CMP:
Camshaft Position Sensor.
CO:
Carbon Monoxide; odorless gas produced by incomplete combustion.
Continuous Memory Codes:
See Pending Codes.
CPS:
Crankshaft Position Sensor. Sends a frequency signal to the PCM. It
is used to reference fuel injector operation and synchronize spark plug
firing on distributorless ignition systems (DIS).
CTS:
Coolant Temperature Sensor. A resistance sensor that sends a
voltage signal to the PCM indicating the temperature of the coolant.
This signal tells the PCM whether the engine is “cold” or “warm”.
CVRTD:
Continuous Variable Real Time Damping.
D/R:
Drive/Reverse.
Data Link Connector (DLC):
Connector providing access and/or control of the vehicle information,
operating conditions, and diagnostic information. Vehicles with OBD II
use a 16-pin connector located in the passenger compartment.
Data Stream:
The actual data communications sent from the vehicle’s PCM to the
data connector.
DEPS:
Digital Engine Position Sensor.
Detonation:
See Knock.
DI/DIS:
Direct Ignition/Distributorless Ignition System. A system that produces
the ignition spark without the use of a distributor.
DPFE:
Differential Pressure Feedback – Exhaust Gas Recirculation Sensor