Bosch HDS 200 User Manual page 49

gizes the Purge Solenoid so the trapped vapors are
drawn into the engine and burned.
PWM:
Pulse width modulated
Pwr:
Power
PZM:
Platform zone module
QDM:
Quad driver module
RAM:
Random access memory
Recirc:
Recirculation
Ref:
Reference
Regen:
Regenerative
Rel:
Relative
Relay:
An electromechanical device in which connections in
one circuit are switched.
Reluctance sensor:
A type of sensor typically used to measure crankshaft or
camshaft speed and/or position, driveshaft speed, and
wheel speed.
Req:
Requested
Req:
Request
ROM:
Read-only memory. Permanent programming information
stored inside the PCM, containing the information the
PCM needs to operate a specific vehicle model/engine
combination.
RPM:
Revolutions per minute
Rtrdr:
Retarder
SAE:
Society of Automotive Engineers
Scan tool:
A device that interfaces with and communicates informa-
tion on a data link.
SDM:
Sensing and diagnostic module
Sensor x:
A standard term used to identify the location of oxygen
sensors. Sensor 1 is located upstream of the catalytic
converter. See O2S, Bank 1, Bank 2.
Sensor:
Any device that reports information to the PCM. The job
of the sensor is to convert a parameter such as engine
temperature into an electrical signal that the PCM can
understand.
SFI or SEFI:
Bosch Automotive Service Solutions Inc.
HDS 200 HD Scan Tool for Class 4-8 Diesel, Light and Medium Vehicles | User guide | 49 | en
Sequential fuel injection or sequential electronic fuel
Injection. A fuel injection system that uses one or more
injectors for each cylinder. The injectors are mounted in
the intake manifold and are fired individually.
Snsr:
Sensor
Solenoid:
A device consisting of an electrical coil which when
energized, produces a magnetic field in a plunger, which
is pulled to a central position. A solenoid may be used as
an actuator in a valve or switch.
Spd:
Speed
Src:
Source
ST:
Short-term
Std:
Standard
STFT:
Short term fuel trim
Stim:
Stimulation
STS:
Service throttle soon
Sup:
Supplemental
Sw:
Switch
Sw'd:
Switched
Sys:
System
TAC:
Throttle actuator control
TBI:
Throttle body injection. A fuel injection system having
one or more injectors mounted in a centrally located
throttle body, as opposed to positioning the injectors
close to an intake valve port. TBI is also called Central
Fuel Injection (CFI) in some vehicles.
TCC:
Torque converter clutch
TCM:
Transmission control module
TCS:
Traction control system for PCM and brakes
TDC:
Top dead center. When a piston is at its uppermost
position in the cylinder.
Temp:
Temperature
TFP:
Transmission fluid pressure
TFT:
Transmission fluid temperature (sensor)
Thresh:
Threshold
581618 | REV. A | 11.2017