2003 TOYOTA AVENSIS DLC3

010B6±13
±
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.
http://vnx.su

D25081
Spring Type Clamp
Clamp Track
D20025
CG
DLC3
TS
D30964
±
INTRODUCTION REPAIR INSTRUCTION
01±17
AVENSIS REPAIR MANUAL (RM1018E)
6. HANDLING OF HOSE CLAMPS
(a) Before removing the hose, check the depth of the insert-
ing portion and the clamp position to restore it surely.
(b) Change a deformed or dented clamp for a new one.
(c) In case of reusing a hose, attach the clamp on the clamp track portion of the hose.
(d) For a spring type clamp, adjust it by adding force to the
arrow mark direction after the installation.
7. FOR VEHICLES EQUIPPED WITH MOBILE COMMU- NICATION SYSTEMS
(a) Install the antenna as far away from the ECU and sensors of the vehicle electronic systems as possible.
(b) Install an antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle electronic sys-
tems. For details of the ECU and sensors locations, refer
to the section on applicable components.
(c) Prevent the antenna feeder from getting entangled with the other wiring, and keep the antenna feeder separate
from other wiring as much as possible.
(d) Check that the antenna and feeder are correctly adjusted.
(e) Do not install any high±powered mobile communication system.
8. FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRC) SYSTEM
(a) NOTICES WHEN USING 2±WHEEL DRUM TESTER
(1) When using a 2±wheel drum tester such as a speedometer tester, a combination tester ofspeedometer and brake, chassis dynamometer or else, always turn the TRC system off via the
TRC OFF switch before measurement.
NOTICE:
TRC system OFF condition can be confirmed by the indication, ºTRC OFF\
º, of the warning light in
the combination meter.
9. FOR VEHICLES EQUIPPED WITH VEHICLE SKIDCONTROL (VSC) SYSTEM
(a) NOTICES WHEN USING DRUM TESTER
(1) When using a drum tester, be sure to start the en-gine with the ignition OFF, and connect SST to the
terminals TS and CG of the DLC3 before measure-
ment in order to prohibit the VSC operation.
SST 09843±18040
http://vnx.su

010BA±14
01±42
±
INTRODUCTION TERMS
AVENSIS REPAIR MANUAL (RM1018E)
GLOSSARY OF SAE AND TOYOTA TERMS
This glossary lists all SAE±J1930 terms and abbreviations used in this ma\
nual in compliance with SAE rec-
ommendations, as well as their TOYOTA equivalents.
SAE
ABBREVIATIONSSAE TERMSTOYOTA TERMS
( )±±ABBREVIATIONS
A/CAir ConditioningAir Conditioner
ACLAir CleanerAir Cleaner, A/CL
AIRSecondary Air InjectionAir Injection (AI)
APAccelerator Pedal±
B+Battery Positive Voltage+B, Battery Voltage
BAROBarometric PressureHAC
CACCharge Air CoolerIntercooler
CARBCarburetorCarburetor
CFIContinuous Fuel Injection±
CKPCrankshaft PositionCrank Angle
CLClosed LoopClosed Loop
CMPCamshaft PositionCam Angle
CPPClutch Pedal Position±
CTOXContinuous Trap Oxidizer±
CTPClosed Throttle PositionLL ON, Idle ON
DFIDirect Fuel Injection (Diesel)Direct Injection (DI/INJ)
DIDistributor Ignition±
DLC1
DLC2
DLC3Data Link Connector 1
Data Link Connector 2
Data Link Connector 31: Check Connector
2: Total Diagnosis Communication Link (TDCL)
3: OBD II Diagnostic Connector
DTCDiagnostic Trouble CodeDiagnostic Trouble Code
DTMDiagnostic Test Mode±
ECLEngine Control Level±
ECMEngine Control ModuleEngine ECU (Electronic Control Unit)
ECTEngine Coolant TemperatureCoolant Temperature, Water Temperature (THW)
EEPROMElectrically Erasable Programmable Read Only Memory
Electrically Erasable Programmable Read Only Memory
(EEPROM),
Erasable Programmable Read Only Memory (EPROM)
EFEEarly Fuel EvaporationCold Mixture Heater (CMH), Heat Control Valve (HCV)
EGRExhaust Gas RecirculationExhaust Gas Recirculation (EGR)
EIElectronic IgnitionDistributorless Ignition (DLI)
EMEngine ModificationEngine Modification (EM)
EPROMErasable Programmable Read Only MemoryProgrammable Read Only Memory (PROM)
EVAPEvaporative EmissionEvaporative Emission Control (EVAP)
FCFan Control±
FEEPROMFlash Electrically Erasable Programmable
Read Only Memory±
FEPROMFlash Erasable Programmable Read Only Memory±
FFFlexible Fuel±
FPFuel PumpFuel Pump
GENGeneratorAlternator
GNDGroundGround (GND)
http://vnx.su

031H1±01
±
SERVICE SPECIFICATIONS ENGINE MECHANICAL
03±13
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE MECHANICAL
SERVICE DATA
1ZZ±FE/3ZZ±FE:
Ignition timingw/ Terminal TC and CG of DLC3 connected
W/ Terminal TC and CG of DLC3 disconnected8 to 12
BTDC
10 to 18
BTDC (1ZZ±FE)
3.5 to 11.5
BTDC (3ZZ±FE)
Idle speed600 to 700 rpm
Compression
Compression pressure
Minimum pressure
Difference between each cylinder
1,300 kPa (13.3 kgf
cm2, 189 psi)
1,000 kPa (10.2 kgf
cm2, 145 psi)
100 kPa (1.0 kgf
cm2, 14 psi)
Cylinder head set bolt Length Standard
Maximum146.8 to 148.2 mm (5.780 to 5.835 in.)
148.5 mm (5.846 in.)
Valve clearance (Cold)
No. 1 Cylinder TDC/Compression Intake Exhaust
No. 4 Cylinder TDC/Compression Intake Exhaust
0.15 to 0.25 mm (0.0059 to 0.0098 in.)
0.25 to 0.35 mm (0.0098 to 0.0138 in.)
0.15 to 0.25 mm (0.0059 to 0.0098 in.)
0.25 to 0.35 mm (0.0098 to 0.0138 in.)
1AZ±FE:
Battery specific gravityat 20
C (68
F)1.25 to 1.29
Ignition timing w/ Terminals TC and CG of DLC3 connected
w/ Terminals TC and CG of DLC3 disconnected8 to 12
BTDC
5 to 15
BTDC
Idle speed650 to 750 rpm
Compression
Compression pressureMinimum pressure
Difference between each cylinder
1,300 kPa (13.3 kgf/cm2, 189 psi)
1,000 kPa (10.2 kgf/cm2, 145 psi)
100 kPa (1.0 kgf/cm2, 14 psi)
Cylinder head set bolt
Bolt length Standard Maximum
161.3 to 162.3 mm (6.350 to 6.390 in.)
164.2 mm (6.465 in.)
Valve clearance
Intake (Cold)
Exhaust
0.19 to 0.29 mm (0.0075 to 0.0114 in.)
0.30 to 0.40 mm (0.0118 to 0.0157 in.)
1AZ±FSE:
Battery specific gravityat 20
C (68
F)1.25 to 1.29
Ignition timing w/ Terminals TC and CG of DLC3 connected
w/ Terminals TC and CG of DLC3 disconnected8 to 12
BTDC
5 to 23
BTDC
Idle speed625 to 725 rpm
Compression
Compression pressureMinimum pressure
Difference between each cylinder
1,300 kPa (13.3 kgf/cm2, 189 psi)
1,000 kPa (10.2 kgf/cm2, 145 psi)
100 kPa (1.0 kgf/cm2, 14 psi)
Cylinder head set bolt
Bolt length Standard Maximum
161.3 to 162.3 mm (6.350 to 6.390 in.)
164.2 mm (6.465 in.)
Valve clearance
Intake (Cold)
Exhaust
0.19 to 0.29 mm (0.0075 to 0.0114 in.)
0.30 to 0.40 mm (0.0118 to 0.0157 in.)
http://vnx.su

100EZ±02
A75903
Air
A53763
VG
EVG
10±54
±
ENGINE CONTROL SYSTEMECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
ECD SYSTEM(1CD±FTV)
ON±VEHICLE INSPECTION
1.INSPECTMASS AIR FLOW METER
(a)If you have hand±held tester: Inspect for operation
(1)Connect the hand±held tester to the DLC3.
(2)Turn the ignition switch ON.
(3)Blow air into the MAF meter, and check that the airflow fluctuates (MAF ) of the CURRENT DATA
shown the standard value.
If operation is not as specified, check the MAF meter (See page
10±56), wiring and ECM.
(b)If you have no hand±held tester: Inspect for operation
(1)Turn the ignition switch ON.
(2)Connect the positive tester probe of the voltmeterto the terminal VG of the ECM. and the negative tes-
ter probe of the voltmeter to the terminal EVG of the
ECM.
(3)Blow air into the MAF meter, and check that the volt- age fluctuates.
If operation is not as specified, check the MAF meter (See page
10±56), wiring and ECM.
2.INSPECT INTAKE SHUTTER
(a)Inspect the throttle control motor for operating sound. (1)Turn the ignition switch ON.
(2)When turning the accelerator pedal position sensor lever, check the running sound of the motor.
Also, check that there is no friction sound.
If operation is not as specified, check the throttle control motor (See page 10±56), wiring and ECM.
(b)Inspect the throttle position sensor. (1)Connect the hand±held tester to the DLC3.
(2)Turn the ignition switch ON.
(3)When turning the accelerator pedal position sensor lever to the full±\
open position, check thatthe throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shown the
standard value.
Standard throttle valve opening percentage:
60 % or more
If operation is not as specified, check that the accelerator pedal positio\
n sensor (See page 10±56), wiring
and ECM.
If you have no hand±held tester, measure voltage between terminals (LU+A ± LU±A, LU+B ± LU±\
B) of the
ECM connector (See page 05±549).
http://vnx.su

±
ENGINE CONTROL SYSTEMECD SYSTEM(1CD±FTV)
10±55
AVENSIS REPAIR MANUAL (RM1018E)
(c)Inspect the air assist system.
(1)Start the engine and check that the CHKENG does not light up.
(2)Allow the engine to warm up to normal operating temperature.
(3)Turn the A/C compressor ON to OFF, and check the idle speed.
Idle speed (Transmission in neutral): 800
50 rpm
NOTICE:
Perform inspection under condition without electrical load.
(d)After checking the above (b) to (d), perform the driving test and check that there is no sense of incon- gruity.
3.INSPECT ACCELERATOR PEDAL POSITION SENSOR
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON.
(c)Check that the voltage (ACCEL POS) of the CURRENT DATA shown the standard value. Accelerator pedal released: 0.5 to 1.1 V
Accelerator pedal depress: 2.6 to 4.5 V
(d)Check that the voltage (ACCEL POS #2) of the CURRENT DATA shown the standard value.
Accelerator pedal released: 1.2 to 2.0 V
Accelerator pedal depress: 3.4 to 5.3 V
If you have no hand±held tester, measure voltage between terminals (VPA1 ± EP1, VPA2 ± EP2) of the ECM
connector (See page 05±549).
http://vnx.su

100G6±02
A75903
Air
A79035
VG
EVG
A79035E2
PSW
10±18
±
ENGINE CONTROL SYSTEMSFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
SFI SYSTEM(1AZ±FE)
ON±VEHICLE INSPECTION
1.INSPECTMASS AIR FLOW METER
(a)If you have hand±held tester: Inspect for operation
(1)Connect the hand±held tester to the DLC3.
(2)Turn the ignition switch ON.
(3)Blow air into the MAF meter, and check that the airflow fluctuates (MAF) of the ºDIAGNOSIS / OBD/
MOBD / DATA LIST / ALLº shown the standard val-
ue.
If operation is not as specified, check the MAF meter (See page
10±20), wiring and ECM.
(b)If you have no hand±held tester: Inspect for operation
(1)Turn the ignition switch ON.
(2)Connect the positive tester probe of the voltmeterto the terminal VG of the ECM. and the negative tes-
ter probe of the voltmeter to the terminal EVG of the
ECM.
(3)Blow air into the MAF meter, and check that the volt- age fluctuates.
If operation is not as specified, check the MAF meter (See page
10±20), wiring and ECM.
2. INSPECT POWER STEERING OIL PRESSURE SEN- SOR
(a) Using a voltmeter, measure the voltage between termi-
nals PSW and E2.
Voltage:
ConditionVoltage (V)
Not spin the steering wheel at engine idling9 to 14
Spin the steering wheel at engine idling0 to 3
http://vnx.su

100G8±02
A75903
Air
A53763VGEVG
±
ENGINE CONTROL SYSTEMSFI SYSTEM(1AZ±FSE)
10±37
AVENSIS REPAIR MANUAL (RM1018E)
SFI SYSTEM(1AZ±FSE)
ON±VEHICLE INSPECTION
1.INSPECTMASS AIR FLOW METER
(a)If you have hand±held tester:
Inspect for operation
(1)Connect the hand±held tester to the DLC3.
(2)Turn the ignition switch ON.
(3)Blow air into the MAF meter, and check that the airflow fluctuates (MAF ) of the CURRENT DATA
shown the standard value.
If operation is not as specified, check the MAF meter (See page
10±39), wiring and ECM.
(b)If you have no hand±held tester: Inspect for operation
(1)Turn the ignition switch ON.
(2)Connect the positive tester probe of the voltmeterto the terminal VG of the ECM. and the negative tes-
ter probe of the voltmeter to the terminal EVG of the
ECM.
(3)Blow air into the MAF meter, and check that the volt- age fluctuates.
If operation is not as specified, check the MAF meter (See page
10±39), wiring and ECM.
http://vnx.su