PRECAUTIONS
General Precautions (Cont'd)
• After disconnecting vacuumorair hoses, attachatag to
indicate theproper connection.
• Use only thefluids andlubricants specifiedinthis manual.
• Use approved bondingagent,sealants ortheir equivalents
when required.
• Use tools andrecommended specialtoolswhere specified
for safe andefficient servicerepairs.
• When repairing thefuel, oil,water, vacuum orexhaust
systems, checkallaffected linesforleaks.
• Dispose ofdrained oilorthe solvent usedforcleaning parts
in an appropriate manner.
Precautions forMultiport FuelInjection System
or ECCS Engine
• Before connecting ordisconnecting anyharness connector
for the multiport fuelinjection systemorEGM (EGGS control
module):
Turn ignition switchto"OFF" position.
Disconnect negativebatteryterminal.
Otherwise, theremaybedamage toEGM.
• Before disconnecting pressurizedfuellinefrom fuelpump to
injectors, besure torelease fuelpressure.
• Becareful nottojar components suchasEGM andmass air
flow sensor.
Precautions forThree WayCatalyst
If a large amount ofunburned fuelflows intothecatalyst, the
catalyst temperature willbeexcessively high.Toprevent this,
follow theinstructions below:
• Use unleaded gasolineonly.Leaded gasoline willseriously
damage thethree waycatalyst.
• When checking forignition sparkormeasuring engine
compression, maketestsquickly andonly when necessary.
• Donot run engine whenthefuel tank level islow, otherwise
the engine maymisfire causing damage tothe catalyst.
Do not place thevehicle onflammable material.Keepflamma-
ble material offthe exhaust pipeandthethree waycatalyst.
Engine Oils
Prolonged andrepeated contactwithused engine oilmay
cause skincancer. Trytoavoid direct skincontact withused oil.
If skin contact is.made, washthoroughly withsoap orhand
cleaner assoon aspossible.
HEALTH PROTECTION PRECAUTIONS
• Avoid prolonged andrepeated contactwithoils, particularly
used engine oils.
• Wear protective clothing,including impervious gloves
where practicable.
• Donot putoily rags inpockets.
• Avoid contaminating clothes,particularly underpants, with
oil.
• Heavily soiledclothing andoil-impregnated footwearshould
not beworn. Overalls mustbecleaned regularly.
• First Aidtreatment shouldbeobtained immediately foropen
cuts andwounds.
• Use barrier creams, applying thembefore eachwork
period, tohelp theremoval ofoil from theskin.
GI-5
•
SAEJ1930 TERMINOLOGY LIST
SAE J1930 Terminology List(Cont'd)
NEW TERM NEW
ACRONYM /
OLDTERM
ABBREVIATION
Manifold surfacetemperature MST
...
Manifold surfacetemperature sensor MSTS
...
Manifold vacuumzone MVZ
...
Manifold vacuumzonesensor MVZS
...
Mass airflow sensor
MAFSAirflow meter
Mixture controlsolenoid valve
MCsolenoid valve Air-fuelratiocontrol solenoid valve
Multipart fuelinjection System MFIsystem Fuelinjection control
Neutral position switch
...
Neutralswitch
Non-volatile randomaccessmemory
NVRAM
...
On-board diagnostic system OBOsystem Self-diagnosis
Open loop
OLOpen
loop
Oxidation catalyst
OCCatalyst
Oxidation catalyticconverter system OCsystem
...
Oxygen sensor
02SExhaust
gassensor
Park position switch
...
Parkswitch
Park/neutral positionswitch
PNPswitch Park/neutralswitch
Periodic trapoxidizer system
PTOXsystem
...
Powertrain controlmodule PCM
...
Programmable readonlymemory PROM
...
Pulsed secondary airinjection controlsole-
PAIRCsolenoid valve AIV
control solenoid valve
noid valve
Pulsed secondary airinjection system PAIRsystem Air
induction valve(AIV)control
Pulsed secondary airinjection valve PAIR
valve Airinduction valve
Random accessmemory RAM
...
Read onlymemory ROM
...
Scan tool ST
...
Secondary airinjection pump AIRpump
...
Secondary airinjection system AIR
system
...
Sequential multiportfuelinjection system SFI
system Sequentialfuelinjection
.
Service reminder indicator SRI
...
Simultaneous multipartfuelinjection system
...
Simultaneousfuelinjection
Smoke pufflimiter system SPL
system
...
Supercharger SC
...
Supercharger bypass 5CB
...
System readiness test 5RT
...
Tank fueltemperature sensor
...
...
Thermal vacuumvalve TVV
Thermal
vacuumvalve
Three waycatalyst TWC
Catalyst
Three waycatalytic converter system TWC
system
...
Three way+oxidation catalyst TWC+OC Catalyst
GI-47
DESCRIPTION
Refrigeration Cycle
REFRIGERANT FLOW
The refrigerant flowisinthe standard pattern.Refrigerant flowsthrough thecompressor, condenser,
liquid tank,evaporator andback tothe compressor.
The refrigerant evaporation throughtheevaporator coiliscontrolled byan externally equalizedexpan-
sion valve, located insidetheevaporator case.
FREEZE PROTECTION
The compressor cyclesonand offtomaintain theevaporator temperature withinaspecified range.When
the evaporator coiltemperature fallsbelow aspecified point,thethermo controlamplifier interrupts the
compressor operation.Whentheevaporator coiltemperature risesabove thespecification, thethermo
control amplifier allowscompressor operation.
REFRIGERANT SYSTEMPROTECTION
Dual-pressure switch
The dual-pressure switchislocated onthe liquid tank.Ifthe system pressure risesorfalls outof
specifications, theswitch openstointerrupt compressor clutchoperation.
Fusible plug
Open attemperature above105°C(221°F), thereby discharging refrigeranttothe atmosphere. Ifthis plug
is melted andopened, checktherefrigerant lineand replace liquidtank.
c:::::.J
High-pressure
EJ
Low-pressure
gas liquid
1:-:-:-:-::-:-::-:-:1
~~~~pressure
!::i'i'i':}':J
~~:-pressure
Compressor
D
Outside air
U
s
t
Fusible plug-~
~..
U
'" Expansionvalve
Liquid tank"'--Dual-pressure switch
HA-10
Blower
motor
SHA504D
