TOYOTA AVENSIS 2005 Service Repair Manual

05±1400
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(d) Service Check Mode Result Display (for checking the cur-
rent and the past system conditions).
(1) Press the ºSEEK TRACKº switch to see the check
result of each device.
(2) Check Result Display.
DisplayOriginal LanguageMeaningAction to be taken
goodGood (normal)No DTCs are detected in both ºSystem Check Modeº and
ºDiagnosis Memory Modeº.±
NCONNo connection
The system recognized the component when it was regis-
tered, but the component gives no response to the ºDiagno-
sis Mode ON Requestº.
Check the power source cir-
cuit and the communication
circuit of the device indi-
cated by the device code
(physical address).
ECHNExchangeOne or more DTC for ºExchangeº is detected in either ºSys-
tem Check Modeº or ºDiagnosis Memory Modeº.
Go to the detail information
mode to check the trouble
area referring to the DTC
list.
CHECCheck
When no DTCs are detected for ºExchangeº, one or more
DTC for ºCheck is detected in either ºSystem Check Modeº
or ºDiagnosis Memory Modeº.Go to the detail information
mode to check the trouble
area referring to the DTC
list.
I34696
The illustration shows the case that the system has 2 devices with codes 190 and 360, and the device (code
360) requires a check.
The check result is displayed in ascending order of device code. The device code is displayed first, and then
the check result.P±±±indicates physical address
190±±±physical address
good±±±ºThe component is normalº.
P±±±indicates physical address
360±±±physical address
CHEC±±±ºCheck neededº.
: SEEK TRACK UP
: SEEK TRACK DOWN

± DIAGNOSTICSAUDIO SYSTEM
05±1401
AVENSIS REPAIR MANUAL (RM1018E) DisplayAction to be taken Meaning Original Language
OLDOld versionOld DTC application is identified and DTC is detected in ei-
ther ºSystem Check Modeº or ºDiagnosis Memory Modeº.±
NRESNo response
The device gives no response to any one of ºSystem Check
Mode ON Requestº, ºSystem Check Result Requestº and
ºDiagnosis Memory Requestº.
Check the power source cir-
cuit and the communication
circuit of the device indi-
cated by the device code
(physical code).
(3) To perform the Service Check again, press the pre-
set switch º1º.
(e) Detailed information Mode (when displaying the troubled
device's DTC)
(1) With ºCHECº or ºECHNº being displayed, press the
preset switch º2º to go to the detailed information
mode.
(2) Press the ºSEEK TRACKº switch to display ºSystem
Check Result (SYS)º and ºDiagnosis Memory Re-
sponse (CODE)º.

I34695
Service Check Mode
Detail Information ModePRESET SWITCH º3º
PRESET SWITCH º2º
Detail information
of the first code
is displayed
Detail information
of the second code
is displayed
Continue to display detailed information
when more than one DTC is detected.
The illustration shows the case that the component with code 190 has DTC º47º and ºdCº as a result of the
system check and the diagnosis memory response.
The detailed information mode shows the system check result first, then the diagnosis memory response result.
(*2): As for the DTCs that do not have any sub code, sub code is not displayed.P±±±indicates physical address
190±±±physical address
SYS±±±system check result
P±±±indicates physical address
360±±±sub code
6F±±±connection
check number 1±±±the first code
62±±±logical address
DC±±±DTC CODE±±±diagnosis memory
response result
2±±±the second code
01±±±logical address
05±±±the number of times of
occurrence
(in decimal) 47±±±DTC
Continue to display detailed information
when more than one DTC is detected.*1
From *1
To * 1(*2)
: SEEK TRACK UP
: SEEK TRACK DOWN
05±1402
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)

± DIAGNOSTICSAUDIO SYSTEM
05±1403
AVENSIS REPAIR MANUAL (RM1018E)
(3) Displayed Items in Detailed Information Mode
Division Code for
DTC displayMeaning
The order of detailed information displayed when the ºSEEK
TRACK UPº switch is pressed. (The order is reversed when
the ºSEEK TRACK DOWNº switch is pressed.)
SYSSystem check result is displayed.Logical address

DTC
CODEDiagnosis memory check result is displayed.
Logical address

DTC

Sub code

Connection confirmation number

The number of times of occurrence
(4) Check the trouble area referring to the DTC list.
(5) To return to the service check mode, press the pre-
set switch º3º.
(f) Clearing Individual DTC Memory (when clearing the
memory of the DTC detected in the past individually)
(1) Press the preset switch º5º for 2 seconds or more
while the ºECHNº is displayed in the service check
mode or during the detail information mode.
HINT:

Beep sound is emitted once when the DTC memory is
completely cleared.

When the DTC memory is cleared, only the component
code (physical address) is displayed for the target compo-
nent.

To check the DTC, press the preset switch º1º and perform
the service check again.
(g) Clearance of all the DTC memory (when clearing all the
memory of the DTC detected in the past)
(1) Start the diagnosis mode after repairing the trouble
area.
(2) Press the preset switch º5º for 2 seconds or more.
(ºCLRº is displayed at this time.)
HINT:

Beep sound is given once when the DTC memory is com-
pletely cleared.

When the DTCs memory for all the device is cleared, only
the component codes (physical address) are displayed.
(3) Press the preset switch º1º to perform the service
check again, and check that no DTCs are displayed
for all the component codes (physical address).

05±1404
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2. IDENTIFICATION OF NOISE SOURCE
(a) Identify the condition under which the noise occurs, and
check the noise filter on the related part.
Condition in which noise occursNoise Source
Depressing the acceleration pedal increases noise, and stopping the engine
erases the noise immediately.Generator
Noise occurs during the A/C or the heater operation.Blower motor
Rapid acceleration while driving on the unpaved road or after the IG switch is
turned ON makes noise.Fuel pump
Pressing and then releasing the horn switch, and keeping pressing the horn
switch makes unusual noise.Horn
Stopping the engine erases small noise that has been heard.Ignition
Noise occurs synchronously with the turn signal flash.Flasher
Noise occurs during the window washer operation.Washer
Noise occurs during the engine running, and it continues after the engine
stops.Engine coolant temperature sensor
Noise occurs during the wiper operation.Wiper
Noise occurs when the brake pedal is depressed.Stop light switch
Others.Static electricity stored on the vehicle
(b) Reference:

Make sure first that there is no noise from outside.
Failing to do so makes the noise source detection
difficult and leads to misunderstanding.

The noise should be removed in descending order
of loudness.

Setting the radio untuned makes noise noticeable,
making the recognition of the phenomenon easier.

05C4W±01
I30195
AUDIO SYSTEM Check Sheet
Inspector 's name:
Customer 's NameVIN
Production Date
Licence No.
Odometer Reading / /km
Mile
Frequency of Problem Occurrence / /

Constant
Intermittent ( Times a day) Brought±in Date
Date of First Occurrence
Problem
Symptom

Radio
Radio receiver assy
DTC
Check
Parts name
DTC (1st time).DTC (2nd time).
Switch

Noise
CD 05±1398
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK

0549G±09
05±1396
±
DIAGNOSTIC SAUDIO SYSTEM
A VENSIS RE PAIR MANUAL (RM1018E)
HOW T O PROCEED WITH TROUBLESHOOTING
1 VEHICL E BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANA LYSIS ( SEE P AGE 05±1398 )
3 CHECK AND CLEAR THE DTCS ( SEE PAGE 05±1399 )
4 PROBLEM SYMPTOM CONFIRMATION
SYMPTOM OCCURS (GO TO STEP 6)
SYMPTOM DOES NOT OCCUR (GO TO
STEP 5)
5 SYMP TOM SIMUL ATION ( SEE PAGE 05±1398 )
6 DTC CHECK ( SEE PAGE 05±1399 )
MALFUNCTION CODE (GO TO STEP 7)
NORMAL CODE (GO TO STEP 8)
7DTC CHART ( SEE PAGE 05±1405 )
GO TO STEP 9
8PROBLEM SYMP TOMS T ABLE ( SEE PAGE 05±1412 )
9 CIRCUIT INSPECTION ( SEE PAGE 05±1413 ± 05±1432 )
10 CONFIRMATION TEST

± DIAGNOSTICSAUDIO SYSTEM
05±1397
AVENSIS REPAIR MANUAL (RM1018E)
END

0549F±10
30 kHz 300 kHz 3 MHz 30 MHz 300 MHz
LF MF HF VHF
AM FM
Frequency modulation Frequency
Designation
Radio wave
Modulation Amplitude modulation
BE2818
FM (Stereo)
FM (Monaural)
AM
BE2819
FadingIonosphere
± DIAGNOSTICSAUDIO SYSTEM
05±1393
AVENSIS REPAIR MANUAL (RM1018E)
AUDIO SYSTEM
DESCRIPTION
1. RADIO WAVE BAND
The radio wave bands used in radio broadcasting are as follows:
LF: Low Frequency
MF: Medium Frequency
HF: High Frequency
VHF: Very High Frequency
2. SERVICE AREA
There are great differences in the size of the service area for AM
and FM broadcasting. Sometimes FM stereo broadcast cannot
be received even through AM can be received very clearly.
FM stereo has the smaller service area, but it also picks up stat-
ic and other types of interference (ºnoiseº) easily.
3. RECEPTION PROBLEMS
HINT:
Besides the problem of static, there are some move problems called ºfadingº, ºmultipathº and ºfade outº.
These problems are caused not by electrical noise but by the nature of the radio waves themselves.
(a) Fading
Besides electrical interference, AM broadcasts are also
susceptible to other types of interference, especially at
night. This is because AM radio waves bounce off the ion-
osphere at night. These radio waves then interfere with
the signals that reach the vehicle's antenna directly from
the same transmitter. This type of interference is called
ºfadingº.

BE2820
Multipath
BE2821
Fade Out 05±1394
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(b) Multipath
Interference caused by reflection of radio waves against
obstructions is called ºMultipathº. Multipath occurs when
radio signals emitted from the broadcast transmitter an-
tenna are reflected against tall buildings or mountains
and interferes with other signals which are to be received
directly.
(c) Fade Out
Because FM frequency is higher than that of AM, FM ra-
dio wave tends to be reflected against obstructions such
as tall buildings or mountains. For this reason, FM signals
often seems to gradually disappear or fade away as the
vehicle goes behind those obstructions. This phenome-
non is called ºfade outº.
4. NOISE PROBLEMS
(a) It is very important for noise troubleshooting to understand a customer's claim clearly. Use the following
table to diagnose the phenomenon.
Radio waveCondition in which noise occursProbable cause
Noise occurs at a specific place.Strong possibility of foreign noise.
AM
Noise occurs when listening to faint broadcasting.The same program may be broadcasted from some local sta-
tions. If the program is the same, one of those may be tuned
in.
Noise occurs only at night.Strong possibility of beat from a distant broadcasting.
FMNoise occurs at a specific place while driving.Strong possibility of multipath noise and fading noise caused
by changes of FM frequency.
HINT:
If the condition where the noise occurs does not meet any of the above, find out the cause based on ºRecep-
tion Problemsº. Refer to the description about Multipath and Fading mentioned previously.
5. COMPACT DISC PLAYER
(a) Compact Disc (hereafter called ºCDº) Players use a laser beam pick±up to read the digital signals re-
corded on the CD and reproduce analog signals of the music, etc. 4.7 in. (12 cm) and 3.2 in. (8 cm)
discs are available for the CD player.
HINT:
Never attempt to disassemble or apply oil to any part of the player unit. Do not insert any object into the maga-
zine except for a disc.
NOTICE:
CD players use an invisible laser beam which could cause hazardous radiation exposure. Be sure
to operate the player correctly as instructed.