air conditioning TOYOTA AVENSIS 2003 Service Repair Manual

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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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)
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022LX±01
±
PREPARATION DIAGNOSTICS
02±1
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTICS
PREPARATION
SST
09243±00020Idle Adjusting Screw WrenchSFI SYSTEM(1AZ±FE)
09843±18040Diagnosis Check Wire No.2AIR CONDITIONING SYSTEM
ELECTRONIC MOTOR POWER
STEERING SYSTEM
SUPPLEMENTAL RESTRAINT
SYSTEM
SFI SYSTEM(1AZ±FE)
ECD SYSTEM(1CD±FTV)
SFI SYSTEM(1ZZ±FE/3ZZ±FE)
09992±00242Turbocharger Pressure GaugeECD SYSTEM(1CD±FTV)
Recomended Tools
09082±00040TOYOTA Electrical TesterCOMBINATION METER
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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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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022KJ±01
±
PREPARATION HEATER & AIR CONDITIONER
02±47
AVENSIS REPAIR MANUAL (RM1018E)
HEATER & AIR CONDITIONER
PREPARATION
SST
07110±58060Air Conditioner Service Tool SetREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±58060)Refrigerant Drain Service ValveREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±58070)T±JointREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
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02±48
±
PREPARATION HEATER & AIR CONDITIONER
AVENSIS REPAIR MANUAL (RM1018E)
(07117±58080)Quick Disconnect AdapterREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±58090)Quick Disconnect AdapterREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±78050)Refrigerant Charging GaugeREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
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±
PREPARATION HEATER & AIR CONDITIONER
02±49
AVENSIS REPAIR MANUAL (RM1018E)
(07117±88060)Refrigerant Charging HoseREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±88070)Refrigerant Charging HoseREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
(07117±88080)Refrigerant Charging HoseREFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
07117±48130Vacuum Pump (220 V)W/RECEIVER CONDENSER ASSY
07117±48140Vacuum Pump (240 V)W/RECEIVER CONDENSER ASSY
09870±00015A/C Quick Joint Puller No.1AIR CONDITIONING RADIATOR
ASSY
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02±50
±
PREPARATION HEATER & AIR CONDITIONER
AVENSIS REPAIR MANUAL (RM1018E)
09870±00025A/C Quick Joint Puller No.2AIR CONDITIONING RADIATOR
ASSY
09950±50013Puller C SetAIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
(09951±05010)Hanger 150AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
(09952±05010)Slide ArmAIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
(09953±05020)Center Bolt 150AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
(09954±05021)Claw No.2AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
Recomended Tools
09040±00011Hexagon Wrench SetAIR CONDITIONING RADIATOR
ASSY
W/RECEIVER CONDENSER ASSY
(09043±20050)Socket Hexagon Wrench 5AIR CONDITIONING RADIATOR
ASSY
(09043±20100)Socket Hexagon Wrench 10W/RECEIVER CONDENSER ASSY
09041±00030Torx Driver T30AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
09042±00010Torx Socket T30AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
09070±20010Moulding RemoverAIR CONDITIONING CONTROL
ASSY
AIR CONDITIONING RADIATOR
ASSY
BLOWER ASSY
09216±00021Belt Tension GaugeV (COOLER COMPRESSOR TO
CRANKSHAFT PULLEY) BELT NO.1
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PREPARATION HEATER & AIR CONDITIONER
02±51
AVENSIS REPAIR MANUAL (RM1018E)
95416±00140Gas Leak Detector
(Halogen Leak Detector)
(DENSO Part No.)REFRIGERANT
AIR CONDITIONING RADIATOR
ASSY
W/PULLEY COMPRESSOR
ASSY(1AZ±FE)
W/PULLEY COMPRESSOR
ASSY(1AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(1CD±FTV)
W/PULLEY COMPRESSOR
ASSY(1ZZ±FE)
W/PULLEY COMPRESSOR
ASSY(2AZ±FSE)
W/PULLEY COMPRESSOR
ASSY(3ZZ±FE)
Equipment
Voltmeter
Anmeter
Ohmmeter
Vinyl tape
Hexagon wrench 4 mm (0.15 in.)
Hexagon wrench 14 mm (0.55 in.)
Gas leak detector
Dial indicator with magnetic base
Radiator cap tester
Torque wrench
Lubricant
ItemCapacityClassification
Compressor oil±ND±OIL 8 or equivalent
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