2005 TOYOTA AVENSIS out side

010B8±08
D25086
WRONG
CORRECT
D25087
Looseness of Crimping
Core Wire
Terminal
Deformation
Pull Lightly 01±32
± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
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). As the re-
sistance may be outside the specifications if measured at high temperatures immediately after
the vehicle has been running, measurements should be made when the engine has cooled
down.
(b) HANDLING OF CONNECTOR
(1) When removing the connector with lock, press the
connector in the direction of the engagement and
remove the lock by lightly pressing the lock claw.
(2) When removing the connector, do not hold the har-
ness, but hold the connector.
(3) Before connecting the connector, check that there
is no deformation, damage or missing terminals.
(4) The connector with a lock should be securely con-
nected until it makes a ºclickº sound.
(5) When checking the connector with a Toyota electri-
cal tester, check it from the backside (harness side)
of the connector using a mini test lead.
NOTICE:

As a water proof connector cannot be checked from
the backside, check by connecting the sub±harness.

Do not damage the terminals by moving the inserted
tester needle.
(c) CONNECTOR CHECKING POINTS
(1) Checking when the connector is connected:
By holding the connector, check the inserted condi-
tion and locking efficiency (engaged condition).
(2) Checking when the connector is removed:
Check by lightly pulling the wire harness (missing
terminal, terminal crimping condition, core wire
break).
Check visually for any rust, metal particles, water
and bent terminals (rust, mixing of foreign object,
terminal deformation).
NOTICE:
When testing a gold±plated female terminal, always use a
gold±plated male terminal.

Important Points with Customer Problem Analysis

What ±±±±± Vehicle model, system name

When ±±±±± Date, time, occurrence frequency

Where ±±±±± Road conditions

Under what conditions? ±±±±± Running conditions, driving conditions, weather conditions

How did it happen? ±±±±± Problem symptoms
(Sample) Supplemental restraint system check sheet.
Supplemental Restraint System Check Sheet
Customer's Name
Date Vehicle Brought In
Registration No.
Frame No.
Odometer Reading
km
miles
Date Problem First Occurred
Weather
Temperature
Vehicle OperationFine Cloudy
StartingIdling
Driving
Constant speed Acceleration
OtherInspector's
Name
CUSTOMER PROBLEM ANALYSIS CHECK
Registration Year
RainySnowyOther / / / /
/ /
Approx.
Deceleration [
]
01±24± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS
HINT:
In troubleshooting, the problem symptoms must be confirmed accurately, meaning that all preconcep-
tions must be set aside in order to make an accurate judgement. To ascertain what the problem symp-
toms are, it is extremely important to ask the customer about the problem and conditions when it oc-
curred.
The following 5 items are important points in the problem analysis. Past problems which are thought
to be unrelated and the repair history, etc. may also help in some cases. Therefore, as much informa-
tion as possible should be gathered and its relationship with the problem symptoms should be correctly
ascertained for use as reference in troubleshooting. A customer problem analysis table is provided for
your use in the Diagnostics Section for each system.

D25083
Vibrate Slightly
Shake Slightly
Vibrate
Slightly
D25084
Malfunction
± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±27
AVENSIS REPAIR MANUAL (RM1018E)
SYMPTOM SIMULATION
HINT:
The most difficult case in troubleshooting is when no symptoms occurs. In such cases, a thorough customer
problem analysis must be carried out. Then the same or similar conditions and environment in which the
problem occurred in the customer's vehicle should be simulated. No matter how much experience a techni-
cian has, or how skilled he may be, if he proceeds to troubleshoot without confirming the problem symptoms,
he will tend to overlook something important in the repair operation and make a wrong guess somewhere,
which will only lead to a standstill. For example, for a problem which only occurs when the engine is cold,
or for a problem which occurs due to vibration caused by the road during driving, etc., the problem can never
be determined when the engine is hot or when the vehicles is at a standstill. Since vibration, heat or water
penetration (moisture) is a likely cause for the problem which is difficult to reproduce, the symptom simulation
tests introduced here are effective measures in a point that the external causes are applied to the vehicle
in a stationary condition.
Important points in the symptom simulation test:
In the symptom simulation test, the problem symptoms should be confirmed, and the problem area or parts
must also be discovered. To do so, reduce the possible problem circuits according to the symptoms before
starting this type of test and have the hand±held tester connected beforehand. After that, carry out the symp-
tom simulation test, judging whether the circuit being tested is defective or normal and also confirming the
problem symptoms at the same time. Refer to the problem symptoms table of each system to narrow down
the possible causes of the symptom.
1. VIBRATION METHOD: When vibration seems to be
the major cause.
(a) PART AND SENSOR
(1) Apply slight vibration with your finger to the part of
the sensor considered to be the problem cause and
check whether the malfunction occurs.
HINT:
Applying strong vibration to relays may result in open relays.
(b) CONNECTORS
(1) Slightly shake the connector vertically and horizon-
tally.
(c) WIRE HARNESS
(1) Slightly shake the wire harness vertically and hori-
zontally.
The connector joint and fulcrum of the vibration are
the major areas that should be checked thoroughly.
2. HEAT METHOD: If the problem seems to occur when
the area in question is heated.
(a) Heat the component that is the possible cause of the mal-
function with a hair dryer or similar object. Check if the
malfunction occurs.
NOTICE:

Do not heat the components to more than 60C
(140F) (Temperature is limited to keep the compo-
nents from being damaged).

01±30±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
The suspected circuits or parts for each problem symptom are shown in the t\
able below. Use this table to
troubleshoot the problem when a Normal code is displayed in the diagnostic trouble c\
ode chart but the prob-
lem is still occurring. Numbers in the table indicate the order in which\
the circuits or parts should be checked.
HINT:
When the problem is not detected by the diagnostic system even though the pr\
oblem symptom is present,
it may be that the problem is occurring outside the detection range of t\
he diagnostic system.
Symptom Suspected AreaSee page
1. With the ignition switch in ACC or ON position, the SRS warning
light sometimes lights up after approx. 6 seconds have elapsed.
2. SRS warning light is always lit up even when ignition switch is
in the LOCK position
1. With the ignition switch in the ACC or ON position, the SRS
warning light does not light up.
PROBLEM SYMPTOMS TABLE
1. DTC is not displayed. 05±187 05±183
Problem SymptomPage
Indicates the page where the flow chart for each circuit
is located.
Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for each problem
symptom. Check in the order indicated by the numbers.
Circuit or Part Name
Indicates the circuit or part which needs to be checked.
Proceed with troubleshooting of each circuit in the table below.
1. SRS warning light circuit
(Always lights up when ignition switch is in
LOCK position.)
1. SRS warning light circuit
(Does not light up when ignition switch is turned
to ACC or ON.)
1. Tc terminal circuit
05±180





3. DTC is displayed without Tc and CG terminal connection. 2. SRS warning light is always lit up at the time of DTC check
procedure.

010B6±13
±
INTRODUCTION HOW 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.

010B5±11
D25082
Rubber Attachment
D27697
: SUPPORT POSITION, PAN
TOGRAPH JACK POSITION
: CENTER OF VEHICLE GRAVITY
(unload condition)
: JACK POSITION
± INTRODUCTIONREPAIR 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 or 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 shown
in 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 the parking brake and place
wheel stoppers only in front of the rear wheels. When jacking down the vehicle with its rear wheels
jacked up, place wheel stoppers only behind the front wheels.

D30401
Mark
01±10
±
INTRODUCTION REPAIR INSTRUCTION
AVENSIS REPAIR MANUAL (RM1018E)
(3)Even in the case of a minor collision where the SRS does not deploy, the horn button assembly, instrument panel passenger airbag assembly and seat belt pretensioner should be in\
spected
(See pages 60±19, 60±19 and 61±9).
(4)Never use the SRS related parts from another vehicle. When replacing the part\
s, replace them with new parts.
(5)Before repairs, remove the airbag sensor if there is a possibility of sh\
ock during repairs.
(6)Never disassemble and repair the center airbag sensor assembly, side airbag sensor assembly, horn button assembly, instrument panel passenger airbag assembly, front seat airbag assembly,
curtain shield airbag assembly or seat belt pretensioner.
(7)If the center airbag sensor assembly, the side airbag sensor assembly, the horn button assembly, the instrument panel passenger airbag assembly have been dropped, or if the\
re are cracks,
dents or other defects in the case, bracket or connector, replace them with new ones.
(8)Do not directly expose the airbag sensor assembly, the side airbag sensor assembly, the horn button assembly, the instrument panel passenger airbag assembly or the seat belt pretensioner
to hot air or flames.
(9)Use a volt/ohmmeter with high impedance (10 k
/V minimum) for troubleshooting electrical cir-
cuits.
(10)Information labels are attached to the SRS components. Follow the instru\
ctions on the notices.
(11)After work on the supplemental restraint system is completed, check the SRS w\
arning light (See page 05±1184)
(b)SPIRAL CABLE (in Combination Switch)(1)The steering wheel must be fitted correctly to thesteering column with the spiral cable at the neutral
position, otherwise cable disconnection and other
troubles may occur. Refer to page 60±26 of this
manual concerning the correct installation of the
steering wheel.
(c) HORN BUTTON ASSEMBLY (with Airbag) (1) When removing the horn button assembly or handling a new horn button, it sho\
uld be placed withthe top of the pad surface facing upward. Placing it with the pad surface facing downward may
lead to a serious accident if the airbag deploys for some reasons. Also, do \
not place anything
on top of the horn button.
(2) Never measure the resistance of the airbag squib (This may cause the airbag to inflate, which is very dangerous).
(3) Grease should not be applied to the horn button assembly, and the pad should not be cleaned with any type of detergent.
(4) Store the horn button assembly where the ambient temperature remains below 93
C (200
F),
without high humidity and away from electrical noise.
(5) When using electric welding, disconnect the airbag connector (4 yellow pins\
) under the steering column near the combination switch connector before starting work.

Z13951
Example:
D26612
Example:CORRECT WRONG
B01546
Example:
01±12
±
INTRODUCTION REPAIR INSTRUCTION
AVENSIS REPAIR MANUAL (RM1018E)
(e)FRONT SEAT AIRBAG ASSEMBLY (1)Always store a removed or new front seat airbag assembly with the airbag infla\
ting direction fac-
ing upward.
Placing the airbag assembly with the airbag inflation direction facing d\
ownward could cause a
serious accident if the airbag inflates.
(2)Never measure the resistance of the airbag squib (This may cause the ai\
rbag to inflate, which
is very dangerous.).
(3)Grease should not be applied to the front seat airbag assembly and the airbag d\
oor should not be cleaned with detergents of any kind.
(4)Store the airbag assembly where the ambient temperature remains below 93
C (200
F), without
high humidity and away from electrical noise.
(5)When using electric welding, first disconnect the airbag connector (2 yello\
w pins) installed on the assembly before starting work.
(6)When disposing of a vehicle or the side airbag assembly alone, the airbag sh\
ould be inflated us- ing an SST before disposal (See page 60±47).
Perform the operation in a safe place away from electrical noise.