2005 TOYOTA AVENSIS radio

0549I±12
I35610
1
6
DISC
SEEK UPSEEK DOWN
± DIAGNOSTICSAUDIO SYSTEM
05±1399
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1. DIAGNOSIS CHECK
(a) Starting Diagnosis Mode (All elements are lighting in the
SW check mode).
(1) Turn off the audio system and turn the IG switch to
ACC. While pressing the preset switches º1º and º6º
at the same time, press ºDISCº 3 times.
(2) Reference:

When the system enters the Diagnosis Mode,
a ºbeepº tone is emitted 3 times and all the
elements are lighting in the SW check mode.

It takes about 40 seconds to complete the
check.

Turn all the elements in the LCD on.

When pressing the switch, comfirm a beep
tone is emitted.

Press ºSEEK TRACK UPº button switches to
enter the ºService Check Screenº.
(b) Service Check Screen.
(1) Reference

In the service check mode, the system check
and the diagnosis memory check are per-
formed, and the check results are displayed
in ascending order of the device codes
(physical address.)
TermsMeaning
Component code
(Physical address)Three±digit code (In hexadecimal) given to each device
comprising AVC±LAN. Corresponding to its function, individ-
ual symbol is provided.
Logical addressTwo±digit code (In hexadecimal) given to each function and
device unit in each device comprising AVC±LAN.
Code No. (physical address) List
Code No.
(physical address)Equipment name
190Radio receiver assy (Audio head unit)
(c) Finishing Diagnosis Mode.
(1) Press ºDISCº for 2 seconds or more, or turn the IG
switch OFF.

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

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.

N17398
Example :
HeadCapstan
Pinch Roller
BE4331
± DIAGNOSTICSAUDIO SYSTEM
05±1395
AVENSIS REPAIR MANUAL (RM1018E)
6. MAINTENANCE
Tape Player / Head Cleaning:
(a) Raise the slot cover with your finger.
Using a pencil or similar object, push in the guide.
(b) Using a cleaning pen or cotton applicator soaked in clean-
er, clean the head surface, pinch rollers and capstans.
7. MAINTENANCE
CD Player / Disc Cleaning:
If the disc gets dirty, clean the disc by wiping the surface from
the center to outside in the radial directions with a soft cloth.
NOTICE:
Do not use a conventional record cleaner or anti±static pre-
servative.
8. COMMUNICATION SYSTEM
(a) Components in the audio system communicate each other though AVC±LAN. (Radio receiver func-
tion)
(b) The master component of AVC±LAN is the radio receiver assy with a resistance (60 ± 80
), which
is necessary for communication.
(c) When short circuit or open circuit occurs in the AVC±LAN circuit, the audio system does not operate
normally due to the communication cutoff.
9. DIAGNOSIS FUNCTION
(a) The audio system has diagnosis function (The diagnosis result is displayed on the LCD of the radio
receiver assy). (Radio receiver function)
(b) The component code (physical address), or three±digit number (in hexadecimal) is set for each com-
ponent comprising AVC±LAN.
(c) The logical address, or two±digit number (in hexadecimal) is set for each function and component unit
in each component.

05C3C±01
NAVIGATION SYSTEM Check SheetInspector 's name:
Customer 's Name
Date of VehicleVIN
Production Date
Licence No.
Odometer Reading / /km
Mile
Frequency Problem Occurs
/ /

Always
Intermittent ( Times a day) Brought in

Cursor movement is defective.
Date Problem First Occurred
Problem Symptom

Cursor does not move.

GPS mark does not appear.

Map is not displayed.

Screen is dark.

Screen is white.

Color is not uniform.

Screen is out of order.

Cannot operate with navigation controller assy
Others ( )

Others ( )

Others ( ) Navigation
malfunction
Display
malfunction
Control
Switch
malfunction
Navigation ECU
Radio Receiver Assy
DTC Check
Parts name 1st time malfunction code. 2nd time malfunction code.
Multi±display (CRT display) Display
Body ECU
± DIAGNOSTICSNAVIGATION SYSTEM
05±1437
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK

I35619
Steering Pad SW LH
AU1
AU2
EAU12
11
10LG
P
W±RR117
8
6SW1
SW2
GND Radio Receiver Assy
R11
R11 S15
S15
S15 05±1432
± DIAGNOSTICSAUDIO SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
A AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD
SWITCH
WIRING DIAGRAM
05C55±01