Operating Instructions

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B
Glossary
BBV:
Brake Boost Vacuum (Sensor)
BCM:
Body Control Module
Boost Control Solenoid:
A solenoid that is energized by the PCM, in order to control turbo/supercharger
bo
ost pressure.
Brake Switch Signal:
An input signal to the PCM indicating that th
e brake pedal is being pressed. This
signal is typically used to disengage Cruise Control systems and Torque
Converter Clutch (TCC) solenoids. See also TCC.
CAM:
Camshaft Position Sensor. Sends a frequency signal to the PCM in order to
syn
chronize fuel injector and spark plug firing.
Catalytic Converter:
Designed to reduce exhaust emissions.
CAN:
Controller Area Network
CARB:
California Air Resources Board. Governin
g body for emissions control in
California.
CKP REF:
Crankshaft Position Reference.
CKP:
Crankshaft Position. See CP
S.
CKT:
Circuit
Closed Loop (CL):
A feedback system that uses the O2 Se
nsor(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.
Code Scanner:
A device that interfaces with and communicates information via a data link.
Continuous Memory Codes:
See Pen
ding Codes.
CPS:
Crankshaft Position Sensor. Sends a frequen
cy signal to the PCM. It is used to
reference fuel injector operation and synchronize spark plug firing on
distributorless ignition systems (DIS).