TOYOTA HIGHLANDER 2001 Service Repair Manual

A93067
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A93067
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- ENGINE CONTROL SYSTEMSFI SYSTEM (3MZ-FE)
10-15
2373 Author
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7. INSPECT RELAY (Marking: EFI, A/F)
(a) Remove the EFI relay from the engine room J/B.
(b) Remove the A/F relay from the engine room R/B No. 2.
(c) Measure the resistance of the relay.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1W
(when battery voltage is applied to terminals 1 and 2)
If the result is not as specified, replace the relay.
8. INSPECT CIRCUIT OPENING RELAY
(a) Remove the circuit opening relay from the R/B sub-assy.
(b) Measure the resistance of the relay.
Standard:
Tester ConnectionSpecified Condition
3 - 510 kW or higher
3 - 5Below 1W
(when battery voltage is applied to terminals 1 and 2)
If the result is not as specified, replace the relay.

110UO-04
Fuel Tube Connector
A50710
Fuel Tube Connector
SST
(Hose)
B12947
SST (Hose)
SST
(Clamp)
Vinyl TubeO-Ring SST (Union)
A94173
- FUELFUEL SYSTEM (3MZ-FE)
11-41
2425 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION
1. INSPECT FUEL INJECTOR ASSY
(a) Check the injector resistance.
(1) Measure the resistance between the terminals.
Standard: 13.4 to 14.2 W at 20C (68F)
If the result is not as specified, replace the injector.
(b) Check the injector injection.
CAUTION:

This test involves high-pressure fuel and electricity.

Take every precaution regarding safe handling of
both the fuel and the electricity.

Perform this test in a safe area, and avoid any sparks
or flame.

Do not smoke.
(1) Purchase a new fuel tube and disconnect fuel tube
connector from its pipe.
Fuel tube: Parts No. 23801-20180
(2) Connect SST and the fuel tube connector to the fuel
pipe.
SST 09268-41047
CAUTION:
Always read the precautions (see page 11-35) before con-
necting the fuel tube connector (quick type).
(3) Install the O-ring to the injector.
(4) Connect SST (union and hose) to the injector, and
hold the injector and union with SST (clamp).
SST 09268-41047 (09268-41110, 09268-41300)
(5) Put the injector into a graduated cylinder.
HINT:
Install a suitable vinyl tube onto the injector to contain the gaso-
line spray.
(6) Operate the fuel pump (see page 11-38).

A94174
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- FUELFUEL SYSTEM (3MZ-FE)
2426 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(7) Connect SST to the connector of injector
(8) Connect SST (wire) to the battery for 15 seconds,
and measure the injector volume with a graduated
cylinder. Test each injector 2or 3 time.
SST 09842-30070
Standard:
ItemSpecified Condition
Injection Volume60 to 73 cm3
(3.7 to 4.5 cu in.)
per 15 seconds
Difference Between Each Injector13 cm3 (0.8 cu in.) or less
NOTICE:
Always turn on and off the voltage on the battery side, not
the fuel pump side.
If the injection volume is not as specified, replace the injector.
(c) Check fuel leakage.
(1) In the condition above, disconnect the test probes
of SST (wire) from the battery and check the fuel
leakage from the injector.
Fuel drop: 1 drop or less per 12 minutes
2. INSPECT FUEL PUMP
(a) Check the fuel pump resistance.
(1) Measure the resistance between the terminals.
Standard: 0.2 to 3.0 W at 20C (68F)
(b) Check fuel pump operation.
(1) Apply battery voltage to both terminals. Check that
the pump operates.
NOTICE:

These tests must be done within 10 seconds to pre-
vent the coil from burning out.

Keep the fuel pump as far away from the battery as
possible.

Always turn on and off the voltage on the battery side,
not the fuel pump side.

010QO-02
- INTRODUCTIONTERMS
01-41
41 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TERMS
ABBREVIATIONS USED IN MANUAL
AbbreviationsMeaning
ABSAnti-Lock Brake System
A/CAir Conditioner
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
ASSYAssembly
A/T, ATMAutomatic Transmission
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
B+Battery Voltage
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi-Level
B/SBore-Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching Valve
CANController Area Network
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
CKDComplete Knock Down
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
CWCurb Weight
DCDirect Current

01-42
- INTRODUCTIONTERMS
42 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)Abbreviations Meaning
DEFDefogger
DFLDeflector
DIFF.Differential
DIFF. LOCKDifferential Lock
D/INJDirect Injection
DLCData Link Connector
DLIDistributorless Ignition
DOHCDouble Overhead Camshaft
DPDash Pot
DSDead Soak
DSPDigital Signal Processor
DTCDiagnostic Trouble Code
DVDDigital Versatile Disc
EBDElectric Brake Force Distribution
ECAMEngine Control And Measurement System
ECDElectronic Controlled Diesel
ECDYEddy Current Dynamometer
ECTElectronic Control Transmission
ECUElectronic Control Unit
EDElectro-Deposited Coating
EDUElectronic Driving Unit
EDICElectric Diesel Injection Control
EFIElectronic Fuel Injection
E/GEngine
EGRExhaust Gas Recirculation
EGR-VMEGR-Vacuum Modulator
ELREmergency Locking Retractor
EMPSElectric Motor Power Steering
ENGEngine
ESAElectronic Spark Advance
ETCS-iElectronic Throttle Control System-intelligent
EVAPEvaporative Emission Control
EVPEvaporator
E-VR VElectric Vacuum Regulating Valve
EXExhaust
FEFuel Economy
FFFront-Engine Front-Wheel-Drive
F/GFuel Gauge
FIPGFormed In Place Gasket
FLFusible Link
F/PFuel Pump
FPUFuel Pressure Up
FrFront
F/WFlywheel
FW/DFlywheel Damper
FWDFront-Wheel-Drive
GASGasoline
GNDGround
GPSGlobal Positioning System
HACHigh Altitude Compensator
H/BHatchback

- INTRODUCTIONTERMS
01-43
43 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)Abbreviations Meaning
H-FUSEHigh Current Fuse
HIHigh
HIDHigh Intensity Discharge (Head Lamp)
HSGHousing
HTHard Top
HWSHeated Windshield System
ICIntegrated Circuit
IDIIndirect Diesel Injection
IFSIndependent Front Suspension
IGIgnition
IIAIntegrated Ignition Assembly
INIntake (Manifold, Valve)
INTIntermittent
I/PInstrument Panel
IRSIndependent Rear Suspension
ISCIdle Speed Control
J/BJunction Block
J/CJunction Connector
KDKick-Down
LANLocal Area Network
LBLiftback
LCDLiquid Crystal Display
LEDLight Emitting Diode
LHLeft-Hand
LHDLeft-Hand Drive
L/H/WLength, Height, Width
LLCLong-Life Coolant
LNGLiquified Natural Gas
LOLow
LPGLiquified Petroleum Gas
LSDLimited Slip Differential
LSP & PVLoad Sensing Proportioning And Bypass Valve
LSPVLoad Sensing Proportioning Valve
MAPManifold Absolute Pressure
MAX.Maximum
MICMicrophone
MILMalfunction Indicator Lamp
MIN.Minimum
MG1Motor Generator No.1
MG2Motor Generator No.2
MPMultipurpose
MPIMultipoint Electronic Injection
MPXMultiplex Communication System
M/T, MTMManual Transmission (Transaxle)
MTMount
MTGMounting
NNeutral
NANatural Aspiration
No.Number
O2SOxygen Sensor
O/DOverdrive

01-44
- INTRODUCTIONTERMS
44 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)Abbreviations Meaning
OEMOriginal Equipment Manufacturing
OHCOverhead Camshaft
OHVOverhead Valve
OPTOption
ORVROn-board Refilling Vapor Recovery
O/SOversize
P & BVProportioning And Bypass Valve
PCSPower Control System
PCVPositive Crankcase Ventilation
PKBParking Brake
PPSProgressive Power Steering
PTCPositive Temperature Coefficient
PSPower Steering
PTOPower Take-Of f
P/WPower Window
R & PRack And Pinion
RAMRandom Access Memory
R/BRelay Block
RBSRecirculating Ball Type Steering
R/FReinforcement
RFSRigid Front Suspension
RHRight-Hand
RHDRight-Hand Drive
RLYRelay
ROMRead Only Memory
RrRear
RRSRigid Rear Suspension
RWDRear-Wheel Drive
SDNSedan
SENSensor
SICSStarting Injection Control System
SOCState Of Charge
SOHCSingle Overhead Camshaft
SPECSpecification
SPISingle Point Injection
SRSSupplemental Restraint System
SSMSpecial Service Materials
SSTSpecial Service Tools
STDStandard
STJCold-Start Fuel Injection
SWSwitch
SYSSystem
T/ATransaxle
TACHTachometer
TBIThrottle Body Electronic Fuel Injection
TCTurbocharger
TCCSTOYOTA Computer-Controlled System
TCVTiming Control Valve
TDCTop Dead Center
TEMP.Temperature
TEMSTOYOTA Electronic Modulated Suspension

- INTRODUCTIONTERMS
01-45
45 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)Abbreviations Meaning
TFTTOYOTA Free-Tronic
TISTotal Information System For Vehicle Development
T/MTransmission
TMCTOYOTA Motor Corporation
TMMKTOYOTA Motor Manufacturing Kentucky, Inc.
TRACTraction Control System
TURBOTurbocharge
TWCThree-W ay Catalyst
U/DUnderdrive
U/SUndersize
VCVVacuum Control Valve
VENTVentilator
VINVehicle Identification Number
VPSVariable Power Steering
VSCVehicle Stability Control
VSVVacuum Switching Valve
VTVVacuum Transmitting Valve
VVT-iVariable Valve Timing-intelligent
w/With
WGNWagon
W/HWire Harness
w/oWithout
WU-TWCWarm Up Three-way Catalytic Converter
WU-OCWarm Up Oxidation Catalytic Converter
1stFirst
2ndSecond
2WDTwo Wheel Drive Vehicle (4 x 2)
3rdThird
4thFourth
4WDFour Wheel Drive Vehicle (4 x 4)
4WSFour Wheel Steering System
5thFifth

010QN-01
D32092
INCORRECT
INCORRECT
CORRECT
D25087
Looseness of Crimping
Core Wire
Terminal
Deformation
Pull Lightly 01-36
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
36 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ELECTRONIC CIRCUIT INSPECTION PROCEDURE
1. BASIC INSPECTION
(a) RESISTANCE MEASURING CONDITION OF ELECTRONIC PARTS
(1) Unless stated, all resistance is measured at an ambient temperature of 20C (68F). Resis-
tances measured may be outside the specifications if measured at high temperatures, i.e. im-
mediately after the vehicle has been running. Measurements should be made after the engine
has cooled down.
(b) HANDLING CONNECTORS
(1) When disconnecting a connector, first squeeze the
mating halves tightly together to release the lock,
then press the lock claw and separate the connec-
tor.
(2) When disconnecting a connector, do not pull on the
harnesses. Grasp the connector directly and sepa-
rate it.
(3) Before connecting the connector, check that there
are no deformed, damaged, loose or missing termi-
nals.
(4) When connecting a connector, press firmly until you
hear the lock close with a ºclickº sound.
(5) If checking the connector with a TOYOTA electrical
tester, check it from the backside (harness side) of
the connector using a mini test lead.
NOTICE:

As a waterproof connector cannot be checked from
the backside, check by connecting a sub-harness.

Do not damage the terminals by moving the inserted
tester needle.
(c) CHECKING CONNECTORS
(1) Checking when the connector is connected:
Squeeze the connector together to confirm that it is
fully inserted and locked.
(2) Checking when the connector is disconnected:
Check by pulling the wire harness lightly from the
backside of the connector. Look for unlatched termi-
nals, missing terminals, loose crimps or broken con-
ductor wires.
Check visually for corrosion, metallic or foreign ob-
jects and water; and bent, rusted, overheated, con-
taminated, and deformed terminals.
NOTICE:
When testing a gold-plated female terminal, always use a
gold-plated male terminal.

D25088
Same terminal as
a male terminal
D32093
CORRECTINCORRECT
D32094
INCORRECT
INCORRECT
INCORRECT
Z17004
C
SensorOPEN
1
2B
1
21
21
2A
Fig. 1
ECU
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01-37
37 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(3) Checking the contact pressure of the terminal:
Prepare a spare male terminal. Insert it into a fe-
male terminal, and check for good tension when in-
serting and after full engagement.
(d) REPAIR METHOD OF CONNECTOR TERMINAL
(1) If there is any dirt on the terminal, clean the contact
point using an air gun or shop rag. Never polish the
contact point using sandpaper as the platings may
come off.
(2) If there is abnormal contact pressure, replace the
female terminal. If the male terminal is gold-plated
(gold color), use a gold-plated female terminal; if it
is silver-plated (silver color), use a silver-plated fe-
male terminal.
(3) Damaged, deformed, or corroded terminals should
be replaced. If the terminal will not lock into the
housing, the housing may have to be replaced.
(e) HANDLING OF WIRE HARNESS
(1) If removing a wire harness, check the wiring and
clamping before proceeding so that it can be re-
stored in the same way.
(2) Never twist, pull or slacken the wire harness more
than necessary.
(3) Never make the wire harness come into contact
with a high temperature part, rotating, moving, vi-
brating or sharp-edged parts. Avoid panel edges,
screw tips and similar sharp items.
(4) When installing parts, never pinch the wire harness.
(5) Never cut or break the cover of the wire harness. If
it is cut or broken, replace it or securely repair it with
vinyl tape.
2. CHECK OPEN CIRCUIT
(a) For an open circuit in the wire harness in Fig. 1, perform
a resistance check (step b) or a voltage check (step c).