Pontiac Fiero 1988 Service Manual page 439

6 E - 1 2 DRIVEABILITY A N D EMISSIONS - F U E L INJECTION
and MPH) for abbreviations used In this Section, but
all types are acceptable.
A/f - AIR/FUEL (A/F RATIO)
A.I.R.
- AIR INJECTOR REACTION SYSTEM
- Air
flow from pump is directed into engine exhaust
manifold and/or converter to reduce exhaust
emissions.
ALDL - ASSEMBLY LINE DIAGNOSTIC LINK
- Used
at assembly to evaluate Computer Command Control,
and for service to flash the "Service Engine Soon"
light if there are trouble codes. It also is used by
"Scan" tools to obtain ECM serial data.
BARO - B A R O M E T R I C A B S O L U T E P R E S S U R E
SENSOR
- Reads atmospheric pressure.
B • - Battery Positive Terminal (12 Volts) or
system voltage with the engine running
(approximately 13.8 v.)
CALPAK
- A device used with fuel injection to
allow fuel delivery in the event of a PROM or ECM
malfunction.
CALIBRATOR - (PROM)
- An electronic component
that can be specifically programmed to meet engine
operating requirements for a specific vehicle model.
It plugs into the Engine Control Module (ECM).
CCC - COMPUTER COMMAND CONTROL - has an
electronic control module to control air/fuel and
emission systems.
CLCC - CLOSED LOOP CARBURETOR CONTROL -
Used to describe oxygen sensor to ECM to M/C
solenoid circuit operation.
C 3
1 - Computer Controlled Coil Ignition. Produces
the ignition spark without the aid of an ignition
distributor.
CCP - CONTROLLED CANISTER PURGE - ECM
controlled solenoid valve that permits manifold
vacuum to purge the evaporative emissions from the
charcoal canister.
CID - CUBIC INCH D I S P L A C E M E N T
- Used to
describe engine size.
C/L OR C/LOOP - "CLOSED LOOP"
- Describes ECM
fuel control when using oxygen sensor information.
- COOLANT TEMPERATURE SENSOR
- Device that
senses the engine coolant temperature, and passes
that information to the engine control module.
CONV. - CATALYTIC CONVERTER, THREE-WAY -
EXHAUST CONVERTER.
Containing platinum and
palladium to speed up conversion of HC and CO, and
rhodium to accelerate conversion of NO
x
.
CO - CARBON MONOXIDE
- One of the pollutants
found in engine exhaust.
CV
- CRANKCASE VENTILATION
- Prevents fumes
in crankcase from passing into the atmosphere, by
drawing them into the intake manifold and burning
them in the the combustion process.
DIAGNOSTIC CODE
- Pair of numbers obtained
from flashing "Service Engine Soon" light or
displaying on a "Scan" tool. This code can be used to
determine the system malfunction.
DIAGNOSTIC TERM.
- Lead of ALDL Connector
which is grounded to get a Trouble Code. It is
grounded with the engine running to enter the "Field
Service Mode".
DIS - Direct Ignition System. Produces the
ignition spark without the aid of an ignition
distributor.
DVM (10 Meg.) • Digital Voltmeter with 10 Million
ohms resistance - used for measurement in electronic
systems.
DWELL
- The amount of time (recorded on a dwell
meter in degrees of crankshaft rotation) that current
passes through a closed switch; for example, ignition
contact points or internal switch in an electronic
control module.
EAC
- ELECTRIC AIR CONTROL
- Used on A.I.R.
system to direct air flow to air switching valve or to
atmosphere.
EAS - ELECTRIC AIR SWITCHING
- used to direct air
flow to catalytic converter or exhaust ports of the
engine.
ECM - ENGINE CONTROL MODULE (ELECTRONIC) -
A metal case (located in passenger compartment)
containing electronic circuitry which electrically
controls and monitors air/fuel and emission systems
on computer command control, and turns "ON" the
"Service Engine Soon" light when a malfunction
occurs in the system.
EFI - ELECTRONIC FUEL INJECTION
- Computer
Command Control using throttle body fuel injection.
EGR - EXHAUST GAS RECIRCULATION
• Method of
reducing N O
x
emission levels by causing exhaust gas
to be added to air/fuel mixture in combustion
chamber, thus cooling combustion.
EECS * E V A P O R A T I V E EMISSIONS CONTROL
SYSTEM
- Used to prevent gasoline vapors in the fuel
tank from entering the atmosphere.
EFE - EARLY FUEL EVAPORATION
- Method of
warming the intake manifold during cold engine
operation. Provides efficient air/fuel mixing.
ENERGIZE/DE-ENERGIZE
- When current is passed
through a coil (energized) such as the canister purge
solenoid, the plunger is pulled into the solenoid.