2003 TOYOTA AVENSIS door

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.
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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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D25096
Example:CORRECTWRONG
Z13950
Example:
D27522
Example: CORRECT WRONG
±
INTRODUCTIONREPAIR INSTRUCTION
01±11
AVENSIS REPAIR MANUAL (RM1018E)
(6)When disposing the vehicle or the horn button assembly alone, the airbag\
should be inflated us-
ing an SST before disposal (See page 60±19).
Perform the operation in a safe place away from electrical noise.
(d)INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (1)Always place a removed or new instrument panel passenger airbag assembly\
with the airbaginflation direction facing upward. Placing the airbag assembly with the airbag inflation direction
facing downward could cause a serious accident if the airbag deploys.
(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 instrument panel passenger airbag assembly\
and the airbag door 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, disconnect the airbag connector (4 yellow pins\
) installed on the as- sembly before starting work.
(6)When disposing of a vehicle or the airbag assembly unit, the airbag should be deployed using\
SST before disposal (See page 60±30).
Activate in a safe place away from electrical noise.
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D30399
Example:CORRECT WRONG
D30398
Example:
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INTRODUCTIONREPAIR INSTRUCTION
01±13
AVENSIS REPAIR MANUAL (RM1018E)
(f)INSTRUMENT PANEL LOWER AIRBAG ASSEMBLY
(1)Always store a removed or new instrument panel lower airbag assembly with the \
airbag inflatingdirection facing 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 instrument panel lower airbag assembly and\
the airbag door should not be cleaned with detergents of any kind.
(4)Store the instrument panel lower airbag assembly where the ambient temperature remains be- low 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
instrument panel lower airbag assembly before starting work.
(6)When disposing of a vehicle or the instrument panel lower airbag assembly alone, the airbag should be inflated using an SST before disposal (See page 60±55).
Perform the operation in a safe place away from electrical noise.
(g) CURTAIN SHIELD AIRBAG ASSEMBLY (1) Always place the removed or new curtain shield airbag assembly in a clear plastic bag, and keepit in a safe place.
NOTICE:
Protection bag is not re±useable.
CAUTION:
Never disassemble the curtain shield airbag assembly. (2) Never measure the resistance of the airbag squib (This may cause the airbag to inflate, whichis very dangerous).
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02±2
±
PREPARATION DIAGNOSTICS
AVENSIS REPAIR MANUAL (RM1018E)
(09083±00150)Test Lead SetAIR CONDITIONING SYSTEM
ABS WITH EBD SYSTEM
ELECTRONIC MOTOR POWER
STEERING SYSTEM
MULTIPLEX COMMUNICATION
SYSTEM
ENGINE IMMOBILISER SYSTEM
ABS WITH EBD & BA & TRC & VSC
SYSTEM
WIRELESS DOOR LOCK CONTROL
SYSTEM
COMBINATION METER
KEY REMINDER WARNING SYSTEM
POWER DOOR LOCK CONTROL
SYSTEM
SFI SYSTEM(1AZ±FE)
SFI SYSTEM(1AZ±FSE)
ECD SYSTEM(1CD±FTV)
SFI SYSTEM(1ZZ±FE/3ZZ±FE)
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U241E(1AZ±FE))
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U241E(1AZ±FSE))
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U341E)
09082±00050TOYOTA Electrical Tester SetPOWER DOOR LOCK CONTROL
SYSTEM
(09083±00150)Test Lead SetAIR CONDITIONING SYSTEM
ABS WITH EBD SYSTEM
ELECTRONIC MOTOR POWER
STEERING SYSTEM
MULTIPLEX COMMUNICATION
SYSTEM
ENGINE IMMOBILISER SYSTEM
ABS WITH EBD & BA & TRC & VSC
SYSTEM
WIRELESS DOOR LOCK CONTROL
SYSTEM
COMBINATION METER
KEY REMINDER WARNING SYSTEM
POWER DOOR LOCK CONTROL
SYSTEM
SFI SYSTEM(1AZ±FE)
SFI SYSTEM(1AZ±FSE)
ECD SYSTEM(1CD±FTV)
SFI SYSTEM(1ZZ±FE/3ZZ±FE)
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U241E(1AZ±FE))
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U241E(1AZ±FSE))
ELECTRONIC CONTROLLED
AUTOMATIC TRANSAXLE
[ECT](U341E)
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022K8±01
±
PREPARATION ENGINE HOOD/DOOR
02±61
AVENSIS REPAIR MANUAL (RM1018E)
ENGINE HOOD/DOOR
PREPARATION
SST
09812±00010Door Hinge Set Bolt WrenchFRONT DOOR
09812±00020Door Hinge Set Bolt WrenchFRONT DOOR
Recomended Tools
09042±00010Torx Socket T30FRONT DOOR
REAR DOOR
09042±00020Torx Socket T40FRONT DOOR
REAR DOOR
LUGGAGE COMPARTMENT DOOR
BACK DOOR(LIFTBACK MODELS)
BACK DOOR(WAGON MODELS)
09050±00032Air DrillFRONT DOOR
09050±20010Air RiveterFRONT DOOR
SSM
08833±00070ºAdhesive 1324,º
THREE BOND 1324 or equivalentFRONT DOOR
REAR DOOR
Equipment
Brass bar
Clip remover
Hand riveter
Hammer
Plastic±faced hammer
TapeTo avoid surface damage
Torque wrench
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022KP±01
02±62
±
PREPARATION EXTERIOR/INTERIOR TRIM
AVENSIS REPAIR MANUAL (RM1018E)
EXTERIOR/INTERIOR TRIM
PREPARATION
Recomended Tools
09070±20010Moulding RemoverFRONT DOOR BELT MOULDING
ASSY LH
REAR DOOR BELT MOULDING
ASSY LH
ROOF HEADLINING
ASSY(LIFTBACK MODELS)
ROOF HEADLINING ASSY(SEDAN
MODELS)
ROOF HEADLINING ASSY(WAGON
MODELS)
Equipment
Adhesive tapeTo avoid surface damage.
Clip remover
Piano wire
Protective tapeTo avoid surface damage.
Torque wrench
Wooden blockFor tying both piano wire ends
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022L7±01
±
PREPARATION WINDSHIELD/WINDOWGLASS/MIRROR
02±57
AVENSIS REPAIR MANUAL (RM1018E)
WINDSHIELD/WINDOWGLASS/MIRROR
PREPARATION
Recomended Tools
09070±20010Moulding RemoverWINDSHIELD GLASS
09082±00040TOYOTA Electrical TesterPOWER WINDOW CONTROL
SYSTEM
WINDOW DEFOGGER SYSTEM
POWER MIRROR CONTROL
SYSTEM
(09083±00150)Test Lead SetPOWER WINDOW CONTROL
SYSTEM
(09083±00350)AC/DC 400 A ProbePOWER WINDOW CONTROL
SYSTEM
Equipment
Knife
Piano wireWindshield
Plastic sheetTo avoid surface damage.
Sealer gun
TapeTo avoid surface damage.
Torque wrench
Wooden block or similar objectFor tying both piano wire ends
SSM
08850±00065Butyl Tape SetINNER REAR VIEW MIRROR ASSY
08850±00801Windshield Glass Adhesive Set
or equivalentWINDSHIELD GLASS
BACK DOOR GLASS(LIFTBACK
MODELS)
BACK WINDOW GLASS(SEDAN
MODELS)
QUARTER WINDOW ASSY
LH(WAGON MODELS)
BACK DOOR GLASS(WAGON
MODELS)
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