User Manual

en
|
38
|
User guide
| CP9670
AutoScanner®
573904 | REV. B | 03.2016
Bosch Automotive Service Solutions Inc.
Connector providing access and/or control of the vehicle
information, operating conditions, and diagnostic infor-
mation. 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
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 injec-
tors.
EGR:
Exhaust gas recirculation. The PCM uses the EGR system
to recirculate exhaust gases back into the intake mani-
fold 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 then
retards spark timing to eliminate the knocking condition.
EST:
Electronic spark timing. An ignition system that allows
the PCM to control spark advance timing. The PCM
determines optimum spark timing from sensor informa-
tion — engine speed, throttle position, coolant tempera-
ture, engine load, vehicle speed, Park/Neutral switch
position, and knock sensor condition.
EVAP:
Evaporative emissions system
FC:
Fan control
Freeze frame:
A block of memory containing DTCs of the vehicle oper-
ating conditions for a specific time.
FTP:
Federal test procedure. Strict test of vehicle’s emissions.
Ground (GND):
An electrical conductor used as a common return for an
electric circuit(s) and with a relative zero potential
(voltage).
Hall effect sensor:
Any of a type of sensor utilizing a permanent magnet and
a transistorized Hall Effect switch. Hall Effect type sen-
sors may be used to measure speed and position of the
crankshaft or camshaft — for spark timing and fuel injec-
tor control.
HO2S:
Heated oxygen sensor. See O2S.
HVAC:
Heating, ventilation, & air conditioning (system)
I/M:
Inspection and maintenance. An emission control pro-
gram.
IAC:
Idle air control. A device mounted on the throttle body
which adjusts the amount of air bypassing a closed
throttle so that the PCM can control idle speed.
IAT:
Intake air temperature (sensor)
ICM:
Ignition control module.
IMRC:
Intake manifold runner control
IPC:
Instrument panel cluster
ISC:
Idle speed control. A small electric motor mounted on
the throttle body and controlled by the PCM. The PCM
can control idle speed by commanding the ISC to adjust
its position.
ISO:
International Organization of Standardization also know
as International Standards Organization.
KAM: