1996 TOYOTA LAND CRUISER Vacuum system

IN04Q−07
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INTRODUCTION TERMS
IN−33
33
Author: Date:
1996 LAND CRUISER (RM451U)
TERMS
ABBREVIATIONS USED IN THIS MANUAL
AbbreviationsMeaning
ABSAnti−Lock Brake System
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir−Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
APPROX.Approximately
A/TAutomatic Transmission (Transaxle)
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi−Level
B/SBore−Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching V alve
Calif.California
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
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IN−34
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INTRODUCTION TERMS
34
Author: Date:
1996 LAND CRUISER (RM451U)
CW
Curb W
eight
DCDirect Current
DEFDefogger
DFLDeflector
DIFF.Differential
DIFF. LOCKDifferential Lock
D/INJDirect Injection
DLIDistributorless Ignition
DOHCDouble Over Head Cam
DPDash Pot
DSDead Soak
DSPDigital Signal Processor
EBDElectronic Brake Force Distribution
ECAMEngine Control And Measurement System
ECDElectronic Controlled Diesel
ECDYEddy Current Dynamometer
ECUElectronic Control Unit
EDElectro−Deposited Coating
EDICElectric Diesel Injection Control
EDUElectronic Driving Unit
EFIElectronic Fuel Injection
E/GEngine
EGR−VMExhaust Gas Recirculation −Vacuum Modulator
ELREmergency Locking Retractor
ENGEngine
ESAElectronic Spark Advance
ETCSElectronic Throttle Control System
EVPEvaporator
E−VRVElectric V acuum Regulating V alve
EXHExhaust
FEFuel Economy
FFFront−Engine Front− Wheel−Drive
F/GFuel Gage
FIPGFormed In Place Gasket
FLFusible Link
F/PFuel Pump
FPUFuel Pressure Up
FrFront
FRFront−Engine Rear− Wheel−Drive
F/WFlywheel
FW/DFlywheel Damper
FWDFront−Wheel−Drive
GASGasoline
GSAGear Shift Actuator
GNDGround
HACHigh Altitude Compensator
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INTRODUCTION TERMS
IN−37
37
Author: Date:
1996 LAND CRUISER (RM451U)
TC
Turbocharger
TCCSTOYOTA
Computer− Controlled System
TCVTiming Control V alve
TDCTop Dead Center
TEMP.Temperature
TEMSTOYOTA Electronic Modulated Suspension
TISTotal Information System For Vehicle Development
T/MTransmission
TMCTOYOTA Motor Corporation
TMMKTOYOTA Motor Manufacturing Kentucky, Inc.
TRACTraction Control System
TURBOTurbocharge
U/DUnderdrive
U/SUndersize
VCVVacuum Control V alve
VENTVentilator
VINVehicle Identification Number
VPSVariable Power Steering
VSCVehicle Skid Control
VSVVacuum Switching Valve
VTVVacuum Transmitting V alve
w/With
WGNWagon
W/HWire Harness
w/oWithout
1stFirst
2ndSecond
2WDTwo Wheel Drive Vehicle (4x2)
4WDFour Wheel Drive Vehicle (4x4)
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INTRODUCTION TERMS
IN−39
1996 LAND CRUISER (RM451U)
HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air T
emperature
ICMIgnition Control Module−
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel−Shutoff−
ISCIdle Speed Control−
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake V acuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Dif ferential Pressure−
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface T emperature−
MVZManifold Vacuum Zone−
NVRAMNon−Volatile Random Access Memory−
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn−Board DiagnosticOn− Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module−
PNPPark/Neutral Position−
PROMProgrammable Read Only Memory−
PSPPower Steering Pressure−
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module−
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE−ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter−
SRIService Reminder Indicator−
SRTSystem Readiness Test−
STScan Tool−
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter
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I01387
Condition : Periodically cools and then fails to cool
I01388
Condition: Insufficient cooling
AC−6
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AIR CONDITIONING AIR CONDITIONING SYSTEM
1996 LAND CRUISER (RM451U)
(2) Moisture present in refrigeration system.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
During operation, pressure on low
pressure side sometimes become
a vacuum and sometime normal
Moisture entered in refrigeration
system freezes at expansion valve
orifice and temporarily stops cycle,
but normal state is restored after a
time when the ice melts Drier in oversaturated state
 Moisture in refrigeration system
freezes at expansion valve orifice
and blocks circulation of refriger-
ant(1) Replace condenser
(2) Remove moisture in cycle
through repeatedly evacuating air
(3) Charge proper amount of new
refrigerant
(3) Insufficient cooling
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure low on both low and
high pressure sides
 Bubbles seen in sight glass con-
tinuously
 Insufficient cooling performance
Gas leakage at some place in re-
frigeration system Insufficient refrigerant in system
 Refrigerant leaking
(1) Check for gas leakage with gas
leak detector and repair if neces-
sary
(2) Charge proper amount of re-
frigerant
(3) If indicated pressure value is
near 0 when connected to gauge,
create the vacuum after inspecting
and repairing the location of the
leak
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I01389
Condition: Insufficient cooling
I01449
Condition: Does not cool (Cools from time to time in some cases)
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AIR CONDITIONING AIR CONDITIONING SYSTEM
AC−7
1996 LAND CRUISER (RM451U)
(4) Poor circulation of refrigerant
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure low in both low and
high pressure sides
 Frost on tube from condenser to
unit
Refrigerant flow obstructed by dirt
in condensercondenser cloggedReplace condenser
(5) Refrigerant does not circulate
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side
 Frost or dew seen on piping be-
fore and after condenser/ drier or
expansion valve Refrigerant flow obstructed by
moisture or dirt in refrigeration sys-
tem
 Refrigerant flow obstructed by
gas leakage from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by blowing with air
(3) Replace condenser
(4) Evacuate air and charge new
refrigerant to proper amount
(5) For gas leakage from expan-
sion valve, replace expansion
valve
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I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient coolingNOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
AC−8
−
AIR CONDITIONING AIR CONDITIONING SYSTEM
1996 LAND CRUISER (RM451U)
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 No air bubbles seen through the
sight glass even when the engine
rpm is lowered Unable to develop sufficient per-
formance due to excessive refrig-
eration system
 Insufficient cooling of condenser Excessive refrigerant in
cycle → refrigerant over charged
 Condenser cooling → condenser
fins clogged or cooling fan faulty
(1) Clean condenser
(2) Check cooling fan with fluid
coupling operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
Charge proper amount of refriger-
ant
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
 Pressure too high on both low
and high pressure sides
 The low pressure piping hot to
touch
 Bubbles seen in sight glass
Air entered in refrigeration system
 Air present in refrigeration sys-
tem
 Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insuf ficient
(2) Evacuate air and charge new
refrigerant
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N13795
Quick Disconnect
AdapterCharging
Service Valve Hose
AC2QE−01
N13794
Vacuum Pump
Vacuum Pump Adapter
N13791
Low Pressure
Service Valve
Vacuum Pump Adapter
High Pressure
Service Valve Manifold
Gauge
Set
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AIR CONDITIONING AIR CONDITIONING SYSTEM
AC−11
1996 LAND CRUISER (RM451U)
EVACUATING
1. CONNECT QUICK DISCONNECT ADAPTERS TO
CHARGING HOSES
2. REMOVE CAPS FROM SERVICE VALVES ON RE- FRIGERANT LINES
3. INSTALL MANIFOLD GAUGE SET
(a) Close both hand valves of manifold gauge set.
(b) Connect the quick disconnect adapters to the service valves.
4. EVACUATE AIR FROM REFRIGERATION SYSTEM
(a) Connect the vacuum pump adapter to the vacuum pump.
(b) Connect the center hose of the manifold gauge set to the vacuum pump adapter.
(c) Open both the high and low hand valves and run the vacu-
um pump.
(d) After 10 minutes or more, check that the low pressure
gauge indicates 750 mmHg (30 in.Hg) or more.
HINT:
If the reading is not 750 mmHg (30 in.Hg) or more, close both
hand valves of manifold gauge set and stop the vacuum pump.
Check the system for leaks and repair as necessary.
(e) Close both the high and low hand valves and stop the vac-
uum pump.
(f) Leave the system in this condition for 5 minutes or more and check that there is no gauge indicator.
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