2003 TOYOTA AVENSIS Service Repair Manual

compression ratio wiper size refuelling driver seat adjustment spare wheel roof rack

Page 57 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual 010B7±13
01±22±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Carry out troubleshooting in accordance with the

Page 58 of 2234

$TOYOTA AVENSIS 2003 Service Repair Manual ± INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS01±23 AVENSIS REPAIR MANUAL (RM1018E) 8 Confirmation test (a) After completing repairs, confirm that the problem has been solved (If the p\$

Page 59 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual Important Points with Customer Problem Analysis
What ±±±±± Vehicle model, system name
When ±±±±± Date, time, occurrence frequency
Where ±±±±± Road conditions
Under what conditio

Page 60 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual ±
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

±
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
http://vnx.su

Page 61 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual 01±26±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
Symptoms exist
No symptoms exist
a Go to step 5
b
4 Simulation test using the symptom simulation m

Page 62 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual D25083
Vibrate Slightly
Shake Slightly
Vibrate
Slightly
D25084
Malfunction
±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±27
AVENSIS REPAIR MANUAL (RM1018E)
SYMPTOM SIMULATION
HINT:
T

D25083
Vibrate Slightly
Shake Slightly
Vibrate
Slightly
D25084
Malfunction
±
INTRODUCTION HOW 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 e\
nvironment 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 c\
onfirming 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 o\
ccurs when the engine is cold,
or for a problem which occurs due to vibration caused by the road during d\
riving, etc., the problem can never
be determined when the engine is hot or when the vehicles is at a standsti\
ll. 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 ofthe 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 60 C
(140 F) (Temperature is limited to keep the compo-
nents from being damaged).
http://vnx.su

Page 63 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual D25085
B02389
ON
01±28
±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
Do not apply heat directly to the parts in the ECU.
3. WATER SPRINKLING METHOD: Wh

Page 64 of 2234

TOYOTA AVENSIS 2003 Service Repair Manual Detection Item
Indicates the system or details of the
problem. Trouble Area
Indicates the suspect areas of
the problem.
Detection Item
DTC No.
(See page)
Trouble Area
SRS
Steering wheel pad (squib)

Detection Item
Indicates the system or details of the
problem. Trouble Area
Indicates the suspect areas of
the problem.
Detection Item
DTC No.
(See page)
Trouble Area
SRS
Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
B0103/12
(05±132) B0102/11
(05±128)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit for that code liste\
d in the table
below (Proceed to the page given for that circuit).
Short in D squib circuit
Open in D squib circuit
B0101/14
(05±124)
Short in D squib circuit (to ground)
Short in D squib circuit (to B+)
Warning Light
ON
ON
ON
ON
Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
B0105/53
(05±136) ON
Airbag sensor assembly
Wire harness
B0106/54 Open in P squib circuit
Airbag sensor assembly
Wire harness
Short in P squib circuit (to Ground) ON
ON
B0100/13
(05±119)
Short in P squib circuit Front passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
Front passenger airbag assembly (squib)
Front passenger airbag assembly (squib)
Page or Instructions
Indicates the page where the inspection proce-
dures for each circuit is to be found, or gives
instructions for checking and repairs.

DTC No.
Indicates the diagnostic trouble code.

±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±29
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
The inspection procedures are shown in the table below. This table allows efficient and accurate trouble-
shooting using the diagnostic trouble codes displayed in the diagnostic trouble code chart. Proceed with
troubleshooting in accordance with the inspection procedures listed in the diagnostic c\
hart corresponding
to the diagnostic trouble codes displayed. The diagnostic trouble code chart for the Supplemental Restraint
System is shown below as an example.
http://vnx.su

Load next 8 pages

Page: < prev 1-10 ... 25-32 33-40 41-48 49-56 57-64 65-72 73-80 81-88 89-96 ... 2240 next >

oil viscosity maintenance schedule wheel bolt torque diagram wiper size lane assist