audio TOYOTA AVENSIS 2005 Service Repair Manual

± INTRODUCTIONHOW 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 addition 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 operating 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

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.

L1L2L1L2L1L2
D02612
L2
L1L2
L1L2
L1
D01201
±
INTRODUCTION REPAIR INSTRUCTION
01±9
AVENSIS REPAIR MANUAL (RM1018E)
(i)TORQUE WHEN USING TORQUE WRENCH WITH EX-
TENSION TOOL
(1)When the torque wrench is combined with SST oran extension tool to extend the length, and you
tighten until the torque wrench reads the specified
torque value, the actual torque becomes excessive.
(2)In this manual, only the specified torque is de-
scribed. In case of using SST or extension tool, cal-
culate the reading of the torque wrench by the fol-
lowing formula.
(3)Formula T'=T x L2/(L1 + L2)
T'Reading of torque wrench N
m kgf
cm ft
lbf 
TTorque N
m kgf
cm ft
lbf 
L1Length of SST or extension tool (cm)
L2Length of torque wrench (cm)
2.FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONER
HINT:
The AVENSIS is equipped with an SRS (Supplemental Restraint System), which \
includes the driver airbag,
front passenger airbag and seat belt pretensioner.
Failure to carry out the service operations in the correct sequence could cause\
the supplemental restraint
system to unexpectedly deploy while servicing. This could cause a seriou\
s accident.
Furthermore, if a mistake is made when servicing the supplemental restra\
int system, it is possible that the
SRS will fail to operate when required. Before servicing (including remova\
l or installation of parts, inspection
or replacement), be sure to read the following items carefully. Then follow the correct procedures described
in this manual.
(a)GENERAL NOTICE
(1)Malfunction symptoms of the supplemental restraint system are difficult to confirm so the diag-nostic trouble codes become the most important source of information when trou\
bleshooting.
When troubleshooting the supplemental restraint system, always check the dia\
gnostic trouble
codes before disconnecting the battery (See page 05±1184).
(2) Work must be started after 90 seconds from the time that the ignition switch\
is turned to the LOCK position and the negative (±) terminal cable is disconnected from the batte\
ry.
(The supplemental restraint system is equipped with a back±up power sourc\
e. So, if work is
started within 90 seconds after disconnecting the negative (±) terminal ca\
ble from the battery,
the SRS may deploy).
When the negative (±) terminal cable is disconnected from the battery, memory of the clock and
audio systems is cancelled. So, before starting work, make a record of the contents recorded
in each memory system. Then, when work is finished, reset the clock and audio systems as be-
fore.

022KX±01
± PREPARATIONAUDIO & VISUAL SYSTEM
02±55
AVENSIS REPAIR MANUAL (RM1018E)
AUDIO & VISUAL SYSTEM
PREPARATION
Recomended Tools
09042±00010Torx Socket T30NAVIGATION ANTENNA ASSY
09042±00030Torx Socket T20CIGARETTE LIGHTER ASSY
09050±00032Air DrillFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
(09050±00210)Chuck SetFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
(09050±00220)HandleFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
09050±20010Air RiveterFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
(09050±02010)Dust CapFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
(09050±02020)Nose Piece No.1FRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
09060±60350Revet CutterFRONT NO.1 SPEAKER ASSY
REAR SPEAKER ASSY
09070±20010Moulding RemoverRADIO RECEIVER ASSY
ANTENNA CORD SUB±ASSY
POWER POINT SOCKET ASSY
NAVIGATION ANTENNA ASSY
ANTENNA CORD SUB±ASSY NO.3
AMPLIFIER ANTENNA
ASSY(LIFTBACK MODELS)
AMPLIFIER ANTENNA ASSY(SEDAN
MODELS)
AMPLIFIER ANTENNA
ASSY(WAGON MODELS)
Equipment
Torque wrench

031HB±01
± SERVICE SPECIFICATIONSAUDIO & VISUAL SYSTEM
03±67
AVENSIS REPAIR MANUAL (RM1018E)
AUDIO & VISUAL SYSTEM
TORQUE SPECIFICATION
Part TightenedN
mkgf
cmft
lbf
Amplifier antenna assy x Body7.07162 in.
lbf
Antenna cord sub±assy x Body7.07162 in.
lbf
Antenna cord sub±assy No.3 x Body7.07162 in.
lbf

05C4X±01
I35612
Sedan:
Engine Room R/B No.1
Engine Room J/B No.1
 DCC FuseSteering Pad Switch LHRadio Receiver Assy
Front No.2 Speaker Assy
Front No.1 Speaker Assy Engine Room R/B No.4 (*1)
Engine Room J/B No.4 (*1)
Engine Room R/B No.3 (*2)
 ALT Fuse
Driver Side J/B
RAD No.1 Fuse
AM1 Fuse
Fuse Block
 RAD No.2 Fuse
Rear No.2 Speaker Assy
Rear No.1 Speaker Assy
*1: Gasoline
*2: 1CD±FTV
± DIAGNOSTICSAUDIO SYSTEM
05±1407
AVENSIS REPAIR MANUAL (RM1018E)
LOCATION

I35613
Lift Back:
Engine Room R/B No.1
Engine Room J/B No.1

DCC FuseEngine Room R/B No.4 (*1)
Engine Room J/B No.4 (*1)
Engine Room R/B No.3 (*2)

ALT FuseRadio Receiver Assy
Front No.2 Speaker Assy Steering Pad Switch LH
Driver Side J/B

RAD No.1 Fuse

AM1 Fuse
Fuse Block

RAD No.2 Fuse
Front No.1 Speaker Assy
Rear No.2 Speaker Assy
Rear No.1 Speaker Assy
*1: Gasoline
*2: 1CD±FTV 05±1408
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)

I35614
Wagon:
Engine Room R/B No.1
Engine Room J/B No.1

DCC FuseEngine Room R/B No.4 (*1)
Engine Room J/B No.4 (*1)
Engine Room R/B No.3 (*2)

ALT Fuse
Steering Pad Switch LHRadio Receiver Assy
Front No.2 Speaker Assy
Driver Side J/B

RAD No.1 Fuse

AM1 Fuse
Fuse Block

RAD No.2 Fuse
Front No.1 Speaker Assy
Rear No.2 Speaker Assy
Rear No.2 Speaker Assy
*1: Gasoline
*2: 1CD±FTV
± DIAGNOSTICSAUDIO SYSTEM
05±1409
AVENSIS REPAIR MANUAL (RM1018E)

0549J±12
± DIAGNOSTICSAUDIO SYSTEM
05±1405
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
TermsMeaning
Physical addressThree±digit code (shown in hexadecimal) which is given to each component com-
prising the AVC±LAN.
Corresponding to the function, individual symbols are specified.
Logical addressTwo±digit code (shown in hexadecimal) which is given to each function comprising
the inner system of the AVC±LAN.
1. RADIO RECEIVER ASSY (Physical address: 190)
HINT:

*1: Even if no failure is detected, trouble code may be stored depending on the battery condition or
voltage for starting the engine.

*2: It is stored when 180 seconds have passed after the power supply connector is pulled out after the
engine starts.

*3: It may be stored when the engine key is turned 1 minuite after the engine starts.

*4: It may be stored when the engine key is turned again after the engine starts.

*5: When 210 seconds have passed after pulling out the power supply connector of the master compo-
nent with the ignition switch in ACC or ON, this code is stored.
(a) Logical address: 01 (Communication control)
DTCDiagnosis itemDescriptionAction to be taken
22RAM ErrorAbnormal condition of RAM is detected.Replace radio receiver assy.
D6
*1Absence of MasterComponent in which this code is recorded
was disconnected from system or master
component with ignition in ACC or ON.
Check harness for power supply system of
radio receiver assy.

Check harness for communication system
of radio receiver assy.
D7
*5Connection check ErrorComponent in which this code is recorded
was disconnected from system or master
component ignition with in ACC or ON.
Check harness for power supply of radio
receiver assy.

Check harness for communication system
of radio receiver assy.
D8
*2No Response to Connection CheckComponent shown by sub code is or was
disconnected from system after engine
start.
Check harness for power supply system of
component shown by sub code.

Check harness for communication system
of component shown by sub code.
D9
*1Last Mode ErrorAudio or visual component operated before
engine stop is or was disconnected with
ignition switch in ACC or ON.
Check harness for power supply system of
component shown by sub code.

Check harness for communication system
of component shown by sub code.
DANo Response to ON/OFF InstructionNo response is identified when changing
mode (audio and visual mode change).
Sound and picture does not change by but-
ton operation.
Check harness for power supply system of
component shown by sub code.

Check harness for communication system
of component shown by sub code.

If error occurs again, replace component
shown by sub code.
DB
*1Mode Status ErrorDual alarm is detected.
Check harness for power supply of compo-
nent shown by sub code.

Check harness for communication system
of component shown by sub code.
DC
*3Transmission ErrorTransmission to component shown by auxil-
iary code failed.
(Detecting this DTC does not necessarily
mean actual failure.)If same sub code is recorded in other com-
ponent, check harness for power supply and
communication system of all components
shown by code.
(If not, delete DTC and recheck.)

05±1406
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E) DD
*4
Master Reset (Momentary Interruption)After the engine was started, master compo-
nent was disconnected from system.
Check harness for power supply system of
multi±display.

Check harness for communication system
of radio receiver assy.

If this error occurs frequently, replace radio
receiver assy.
DE
*4Slave Reset (Momentary Interruption)After the engine was started, component
shown by sub code had been disconnected
from system.
Check harness for power supply of compo-
nent shown by sub code.

Check harness for communication system
of component shown by sub code.
E0
*1Registration Completion Instruction ErrorºRegistration Completion Instructionº com-
mand from master cannot be received.Since this DTC is provided for engineering
purpose, it may be detected when no actual
failure exists.
E2ON/OFF Instruction Parameter ErrorError occures in ON/OFF controlling com-
mand from master component.Replace radio receiver assy
E3
*1
Registration Request TransmissionRegistration Request command is output
from component shown by sub code.
Receiving Connection Check Instruction,
Registration Request command is output
from sub±master component.Since this DTC is provided for engineering
purpose, it may be detected when no actual
failure exists.
(b) Logical address: 61 (Cassette switch)
DTCDiagnosis itemDescriptionAction to be taken
40Mechanical Error of Media Malfunction due to mechanical failure is
identified.
Or cassette tape is cut or entangled.
Inspect cassette tape.

Replace radio receiver assy.
41EJECT ErrorMalfunction due to mechanical failure.Replace radio receiver assy.
42Tape caught in the radio receiver assyHub lock etc.Inspect cassette tape.
(c) Logical address: 62 (CD player)
DTCDiagnosis itemDescriptionAction to be taken
42No Disc ReadoutDisc cannot be read.
Inspect CD.

Replace radio receiver assy.
44CD player ErrorError is detected in CD player.Replace radio receiver assy.
45EJECT ErrorMagazine cannot be ejected.Replace radio receiver assy.
46Scratched/Reversed DiscScratches or dirt is found on CD surface or
CD is set upside down.Inspect CD.
47CD High Temp.High temperature is detected in CD player.Replace radio receiver assy.
48CD Excess CurrentExcess current is applied CD player.Replace radio receiver assy.