2003 TOYOTA AVENSIS manual transmission

010B6±13
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INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±21
AVENSIS REPAIR MANUAL (RM1018E)
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
There are many ECU controlled systems used in the AVENSIS. In general, ECU controlled system are con-
sidered to be very intricate and require a high level of technical knowledge an\
d expert skill to troubleshoot.
The fact is, however, that if you proceed by inspecting the circuits one by one, troubleshoo\
ting of these sys-
tems is not complex. If you have adequate understanding of the system and ba\
sic knowledge of electricity,
the problem can be accurately diagnosed and fixed. This manual is design\
ed based on the above principle
to help service technicians perform accurate and effective troubleshooting, and is compiled for the following
major ECU controlled systems:
The troubleshooting procedures are described on the following pages.
SystemPage
1. SFI System [1ZZ±FE, 3ZZ±FE]05±1
2. SFI System [1AZ±FE]05±143
3. SFI System [1AZ±FSE]05±290
4. ECD System [1CD±FTV]05±523
5. ABS with EBD System05±696
6. ABS with EBD & BA & TRC & VSC System05±752
7. Electronic Controlled Automatic Transmission [ECT] [U241 (1AZ±FE)]05±856
8. Electronic Controlled Automatic Transmission [ECT] [U241 (1AZ±FSE)]05±915
9. Electronic Controlled Automatic Transmission [ECT] [U341]05±980
10.Electronic Motor Power Steering System05±1042
11. Air Conditioning System05±1088
12.Combustion Type Power Heater System05±1161
13.Supplemental Restraint System05±1181
14.Audio System05±1393
15.Navigation System05±1435
16.Combination Meter05±1497
17.Power Door Lock Control System05±1534
18.Wireless Door Lock Control System05±1568
19.Key Reminder Warning System05±1586
20.Engine Immobiliser System05±1599
21.Theft Deterrent System05±1627
22.Multiplex Communication System05±1654
23.Cruise Control System05±1697
FOR USING HAND±HELD TESTER

Before using the tester, the tester's operator manual should be read thoroughly.

If the tester cannot communicate with the ECU controlled systems when you \
have connected the cable
of tester to the DLC3, turned the ignition switch ON and operated the test\
er, there is a problem on the
vehicle side or tester side.
(1) If the communication is normal when the tester is connected to another veh\
icle, inspect the diag-
nosis data link line (Bus
line) or ECU power circuit of the vehicle.
(2) If the communication is still impossible when the tester is connected to a\
nother vehicle, the prob- lem is probably in the tester itself, so perform the Self Test procedures outlined in the Tester Oper-
ator 's Manual.
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INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±25
AVENSIS REPAIR MANUAL (RM1018E)
SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE
HINT:

The diagnostic system in AVENSIS has various functions. The first function is the Diagnostic Trouble
Code (DTC) Check, in which a malfunction in the signal circuits to the ECU is stored in code form in
the ECU memory. Another function is the Input Signal Check, which checks if the signals from various
switches are sent to the ECU correctly. By using these check functions, it is possible to quickly narrow
down potential problem areas and troubleshooting can be performed effectively. The diagnostic func-
tions are incorporated in the following systems in the AVENSIS.
SystemDiagnostic Trouble
Code CheckInput Signal Check(Sensor Check)Diagnostic Test
Mode (Active Test)
SFI System (1AZ±FE/1AZ±FSE, 1ZZ±FE/3ZZ±FE)

(with Check Mode)


ECD System (1CD±FTV)

(with Check Mode)


ABS with EBD System



ABS with EBD & BA & TRC & VSC System



Electronically Controlled Automatic Transmission [ECT]

(with Check Mode)

Air Conditioning System


Supplemental Restraint System

Audio System

Power Door Lock Control System


Wireless Door Lock Control System

Key Reminder Warning System

Engine Immobiliser System


Theft Deterrent System


Multiplex Communication System

Cruise Control System



In the DTC check, it is very important to determine whether the problem indicated by the DTC is still
occurring or has occurred in the past but returned to normal at present. In addit\
ion during the problem
symptom check, it a check must be made on whether the malfunction indicated by \
the DTC is directly
related to the problem symptom or not. For this reason, the DTC should be checked before and after
symptom confirmation to determine the current conditions. If this is not done, \
it may, depending on the
case, result in unnecessary troubleshooting for systems that are operati\
ng normally. This would make
more difficult to detect the problem area or to try to repair irrelevant areas. \
Therefore, always follow
the procedures in the correct order and perform the DTC check.

A flow chart showing how to proceed with troubleshooting using the diagnostic trouble\
code (DTC)
check is shown the this page. This flow chart shows how to utilize the DTC check effectively. Then,
by carefully checking the results, this chart indicates how to proceed either to the DTC troubleshooting
or to the troubleshooting of the problem symptoms table.
1 DTC check
2 Make a note of DTCs displayed and then clear the memory
3 Symptom confirmation
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010LE±01
D30402
D30403
AB C
D
E
FG
H
01±4
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INTRODUCTION IDENTIFICATION INFORMATION
AVENSIS REPAIR MANUAL (RM1018E)
IDENTIFICATION INFORMATION
VEHICLE IDENTIFICATION AND SERIAL NUMBERS
1. VEHICLE IDENTIFICATION NUMBER
(a) The vehicle identification number is stamped in the en- gine compartment, as shown in the illustration. This num-
ber has also been stamped on the manufacturer's plate.
2. ENGINE SERIAL NUMBER AND TRANSAXLE SERIAL NUMBER
(a) The engine serial number is stamped on the cylinder block of the engine and the transmission serial number is
stamped on the housing as shown in the illustration.
A: 1CD±FTV
B: 1AZ±FE, 1AZ±FSE
C: 1ZZ±FE, 3ZZ±FE
D: C50, C250
E: U241E
F: E354, E357, U241E
G: U241E
H: U341E
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010B5±11
D25082
Rubber Attachment
D27697
: SUPPORT POSITION, PAN
TOGRAPH JACK POSITION
: CENTER OF VEHICLE GRAVITY
(unload condition)
: JACK POSITION
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INTRODUCTION REPAIR INSTRUCTION
01±19
AVENSIS REPAIR MANUAL (RM1018E)
VEHICLE LIFT AND SUPPORT LOCATIONS
1. NOTICE ABOUT VEHICLE CONDITION WHEN JACKING UP
(a) As a rule, the vehicle must be unloaded when jacking up. Never jack up o\
r lift up the vehicle loaded
with things of heavy weight.
(b) When removing any parts of heavy weight like the engine and transmission, the center of gravity of the vehicle moves. Place a balance weight so as to keep it from rolling,\
or hold the jacking support
location using the mission jack.
2. NOTICE FOR USING 4 POST LIFT
(a) Follow the instruction manual for a safety operation.
(b) Do not damage tires or wheels with a free wheel beam.
(c) Using a wheel stopper, fix the vehicle.
3. NOTICE FOR USING JACK AND SAFETY STAND
(a) Work in the flat place using a wheel stopper at all times.
(b) Use a safety stand with a rubber attachment, as shownin the illustration.
(c) Support the specified location with a jack and safety stand accurately.
(d) When jacking up the front wheels, release the parking
brake and place wheel stoppers only behind the rear
wheels. When jacking up the rear wheels, place wheel
stoppers only in front of the front wheels.
(e) Do not work or leave the vehicle supported only by a jack. Be sure to support the vehicle with a safety stand.
(f) When jacking up only the front wheels or only the rear wheels, place wheel stoppers to both sides of the wheels that contact ground.
(g) When jacking down the vehicle with its front wheels jacked up, release t\
he parking brake and place wheel stoppers only in front of the rear wheels. When jacking down the v\
ehicle with its rear wheels
jacked up, place wheel stoppers only behind the front wheels.
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010B9±11
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INTRODUCTION TERMS
01±37
AVENSIS REPAIR MANUAL (RM1018E)
TERMS
ABBREVIATIONS USED IN THIS 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 (Transaxle)
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
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01±38
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INTRODUCTION TERMS
AVENSIS REPAIR MANUAL (RM1018E) 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±VRVElectric 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
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INTRODUCTION TERMS
01±39
AVENSIS REPAIR MANUAL (RM1018E)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
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INTRODUCTION TERMS
01±41
AVENSIS REPAIR MANUAL (RM1018E)Abbreviations Meaning
TFTToyota Free±Tronic
TISTotal Information System For Vehicle Development
T/MTransmission
TMCTOYOTA Motor Corporation
TMMKTOYOTA Motor Manufacturing Kentucky, Inc.
TRCTraction Control System
TURBOTurbocharge
TWCThree±Way 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
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