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An emission control system operated by the PCM. Dur-
ing cold starts, an air pump injects outside air into the
exhaust manifold to help burn hot exhaust gases. This
reduces pollution and speeds warm-up of oxygen sen-
sors and catalytic converters. After the engine is warm,
the air will either be dumped back to the atmosphere (or
into the air cleaner assembly) or sent to the catalytic
converter.
Adp:
Adaptive
AFT:
Aftertreatment
AFT 1:
Aftertreatment 1
AFT 2:
Aftertreatment 2
Alt:
Alternator
AP:
Absolute pressure
APP:
Acceleration pedal position (sensor)
Appl:
Application
ASR:
Acceleration slip regulation
Assm:
Assembly
Aux:
Auxiliary
Avail:
Available
Avg:
Average
Bank x:
The standard way of referring to the bank of cylinders
containing cylinder #x. In-line engines have only one
bank of cylinders. Most commonly used to identify the
location of oxygen sensors. See O2S, Sensor x, Sensor
x.
BAP:
Barometic absolute pressure
Baro:
Barometric
BARO:
Barometric pressure sensor. See MAP sensor.
Batt:
Battery
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 boost pressure.
Brake switch signal:
An input signal to the PCM indicating that the brake
pedal is being pressed. This signal is typically used to
Bosch Automotive Service Solutions Inc.
HDS 200 HD Scan Tool for Class 4-8 Diesel, Light and Medium Vehicles | User guide | 45 | en
disengage cruise control systems and torque converter
clutch (TCC) solenoids. See also TCC.
Cal:
Calibration
Calc:
Calculated
CAM:
Camshaft position sensor. Sends a frequency signal to
the PCM to synchronize fuel injector and spark plug
firing.
Catalytic converter:
Designed to reduce exhaust emissions.
CAN:
Controller area network
CARB:
California air resources board. Governing body for emis-
sions control in California.
CC:
Cruise control
Cfg:
Configuration
Chnl:
Channel
Circ:
Circuit
CKP REF:
Crankshaft position reference.
CKP:
Crankshaft position. See CPS.
CKT:
Circuit
Clnt:
Coolant
Closed loop (CL):
A feedback system that uses the O2 Sensor(s) to moni-
tor 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.
Cmd:
Command
Cmn:
Common
CMP:
Camshaft position sensor
CO:
Carbon monoxide; odorless gas produced by incomplete
combustion.
Code scanner:
A device that interfaces with and communicates informa-
tion via a data link.
Cont:
Continuous
Continuous memory codes:
See pending codes.
CPS:
581618 | REV. A | 11.2017
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