2000 Toyota Celica Diversity Radio Fades

Press the lock and unlock switches on the transmitter switch simultaneously for more than between 1 sec. or more and 1.5 sec. below.

Press either one of 2 switches on the transmitter.

Door control relay automatically performs LOCK-UNLOCK operation once or twice at a 1 sec. interval to inform the operator that the receiver has received the signal from the transmitter.

LOCK-UNLOCK occurs once

Registration of recognition code is completed

LOCK-UNLOCK occurs twice

Registration of recognition code has not been completed.

• Recognition code received first time and second time did not match.

• When selecting add mode, a registered recognition code was received. If LOCK-UNLOCK operation can not be performed at all, the mode returns to the normal mode, then start with "Start registration of recognition code".

Proceed to finish registration

Proceed to continue registration

Within 40 sees.

If even one of the following conditions is satisfied, registration of recognition codes is completed.

• 40 sees, elapses since the door control relay response.

• The key plate is inserted in the ignition key cylinder,

• 4 type recognition codes are registration at one time.

Registration of recognition codes {add mode or rewrite mode) is completed

SLIDING ROOF SYSTEM TROUBLESHOOTING

LOCATION

Sliding Roof Assembly

153593

INSPECTION

1. INSPECT SLIDING ROOF SWITCH CONTINUITY

Switch position

Testor connection

Specified condition

OPEN

3-8

Continuity

OFF

-

No continuity

CLOSE

4-8

Continuity

If continuity is not as specified, replace the switch.

Wire Harness Side

2. INSPECT SLIDING ROOF CONTROL ASSEMBLY CIRCUIT

Disconnect the connector from the ECU and inspect the connector on the wire harness side, as shown in the chart.

Tester connection

Condition

Specified condition

1 - Ground

Constant

Continuity

2 - Ground

Ignition switch LOCK or ACC

No voltage*

2 - Ground

Ignition switch ON

Battery positive vollage

5 - Ground

Constant

Battery positive vottage

7 ~ Ground

Constant

Continuity

6 - Ground

Constant

No continuity

8 - Ground

Ignition switch LOCK or ACC

No voltage

8 - Ground

Ignition switch ON

fi artery positive voltage

9 - Ground

Sliding roof control switch CLOSE/DOWN

No continuity

9 - Ground

Sliding roof control switch OPEN/UP

Continuity

10-Ground

Sliding roof control switch OPEN/UP

No continuity

10-Ground

Sliding roof control switch CLOSE/DOWN

Continuity

*: Exceptions: During 43 second period after ignition switch ON OFF (ACC) or until driver of passenger door in opened after ignition switch ON ~> OFF (ACC). II circuil is as specified, replace the assembly.

POWER MIRROR CONTROL SYSTEM LOCATION

Mirror Assembly • Mirror Motor

p nassa

Wiring Mirror Switch Toyota Celica

INSPECTION

1. INSPECT LEFT SIDE MIRROR SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

OFF

-

No continuity

4-8

UP

6-7

Continuity

4-7

DOWN

6-8

Continuity

5-8

LEFT

6-7

Continuity

RIGHT

5-7

e-8

Continuity

2. INSPECT RIGHT SIDE MIRROR SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

OFF

-

No continuity

UP

3-8 6-7

Continuity

DOWN

3-7 6-8

Continuity

LEFT

2-8 6-7

Continuity

RIGHT

2-7 6-8

Continuity

If continuity is not as specified, replace the switch. If continuity is as specified, inspect the switch circuit.

If continuity is not as specified, replace the switch. If continuity is as specified, inspect the switch circuit.

3. INSPECT MIRROR MOTOR OPERATION

(a) Connect the positive {+} lead from the battery to terminal 3 and the negative {-) lead to terminal 1, and check that the mirror turns right side.

(b) Reverse the polarity, and check that the mirror turns left side.

(c) Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 5, and check that the mirror turns to the downward.

(d) Reverse the polarity, and check that the mirror turns to the upward.

If operation is not as specified, replace the mirror assembly.

AUDIO SYSTEM DESCRIPTION

1. RADIO WAVE BAND

The radio wave bands used in radio broadcasting are as follows:

Frequency

30 kHz

Designation

Radio wave

300 kHz 3 MHz

30 MHz

300 MHz

Modulation method

Amplitude modulation

Frequency modulation

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 monaural. Sometimes FM stereo broadcasts cannot be received even through AM comes in very clearly.

Not only does FM stereo have the smallest service area, but it also picks up static and other types of interference {"noise")

easily.

3. RECEPTION PROBLEMS

Besides the problem of static, there are also the problems called "fading", "multipath" and "fade out". These problems are caused not by electrical noise but by the nature of the radio waves themselves.

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 ionosphere at night. These radio waves then interfere with the signals from the same transmitter that reach the vehicle's antenna directly. This type of interference is called "fading".

Multipath

One type of interference caused by bouncing of radio waves off obstructions is called "multipath". Multipath occurs when a signal from the broadcast transmitter antenna bounces off buildings and mountains and interferes with the signal that is received directly.

Fade Out

Because FM radio waves are of higher frequencies than AM radio waves, they bounce off buildings, mountains, and other obstructions. For this reason, FM signals often seem to gradually disappear or fade away as the vehicle goes behind a building or other obstructions. This is called "fade out".

4. NOISE PROBLEMS

(a) Questionnaire for noise:

It is very important for noise troubleshooting to have good understanding of the claims from the customers, so that make the best use of following quenstionnaire and diagnose the problem accurately.

Noise occurs at a specific place.

Strong possibility of foreign noise.

AM

Noise occurs when listening to faint broadcasting.

There is a case that the same program is broadcasted from each local station and that may be the case you are listening to different station if the program is the same.

Noise occurs only at night.

Strong possibility o( the beat from a distant broadcasting.

FM

Noise occurs while driving and at a specific place.

Strong possibility of multipath noise and fading noise caused by the changes of FM waves.

HINT:

In the case that the noise occurrence condition does not meet any of the above quenstionnaire, check based on the "Trouble Phenomenon".

Refer to previous page for multipath and fading.

(b) Matlers that require attention when checking:

• Noise coming into the radio usually has no harm for practical use as the noise protection is taken and it is hardly thinkable for an extremely loud noise to come in. When extremely loud noise comes into the radio, check if the grounding is normal where the antenna is installed.

Check if all the regular noise prevention parts are properly installed and if there is any installation of non-authorized parts and non-authorized wiring. If you leave the radio out of tune (not tuning), it is easy to diagnose the phenomenon as noise occurs frequently.

Noise i Glass Printed Antenna Noise j

Noise

Noise

(c) Antenna and noise:

Electronic signal received by the antenna will reach to the radio transmitting through the core wire of the coaxial cable. Any noise wave other than radio wave is mixed into this core wire, that naturally causes noise in the radio and poor sound quality. In order to prevent these noises from mixing into the radio, the core wire inside the coaxial cable is covered with a mesh wire called shield wire. This shield wire shelters the noise and transmits it to the ground, thus preventing noise from mixing in. If this shield wire has grounding failure, that causes noise. 5. COMPACT DISC PLAYER

Compact Disc Players use a laser beam pick-up to read the digital signals recorded on the CD and reproduce analog signals of the music, etc. HINT:

Never attempt to disassemble or oil any part of the player unit. Do not insert any object other than a disc into the magazine. NOTICE:

CD players use an invisible faser beam which could cause hazardous radiation exposure. Be sure to operate the player correctly as instructed.

Example :

Head

Capstan i /

Head

Capstan

Pinch Roller

Tape Player/Head Cleaning: MAINTENANCE

Raise the cassette door with your finger. Next, using a pencil or similar object, push in the guide. Using a cleaning pen or cotton applicator soaked in cleaner, clean the head surface, pinch rollers and capstans.

Pinch Roller

7. CD Piayer/Disc Cleaning: MAINTENANCE

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 preservative.

AVC-LAN is the abbreviation, which stands for Audio Visual Communication-Local Area Network. This is a unified standard co-developed by 6 audio manufactures associated with Toyota Motor Corporation.

The Unified standard covers signals, such as audio signal, visual signal, signal for switch indication and communication signal.

(b) Objectives

Recently the car audio system has been rapidly developed and functions have been changed drastically. The conventional system has been switched to the multi-media type such as a navigation system. At the same time the level of customers needs to audio system has been upgraded. This lies behind this standardization. The concrete objectives are explained below.

(1 ) When products by different manufactures were combined together, there used to be a case that malfunction occurred such as sound did not come out. This problem has been resolved by standardization of signals.

(2) Various types of after market products have been able to add or replace freely.

(3) Because of the above (2), each manufacture has become able to concentrate on developing products in their strongest field. This has enabled many types of products provided inexpensively.

(4) Conventionally, a new product developed by a manufacture could not be used due to a lack of compatibility with other manufactures products. Because of this new standard, users can enjoy compatible products provided for them timely.

(c) The above descriptions are the objectives to introduce AVC-LAN. By this standardization, development of new products will no longer cause systematic errors. Thus, this is very effective standard for a product in the future.

HINT:

When +B short or GND short is detected in AVC-LAN circuit, communication stops. Accordingly the audio system does not function normally.

When audio system is not equipped with a navigation system, audio head unit is the master unit. (When audio system is equipped with a navigation system, navigation ECU is the master unit.) The car audio system using AVC-LAN circuit has a diagnosis function.

Each product has its own specified numbers called physical address. Numbers are also allotted to each function in one product, which are called logical address.

9. DIAGNOSIS FUNCTION

Error codes over tuner and connected equipment are displayed on the screen of tuner.

(a) Diagnosis start-up

For shifting to diagnosis mode, push "CD" switch 3 times with pressing "1" and "6" of PRESET switch at the same time while the audio power is OFF and ACC is ON.

To exit from diagnosis mode, press "CD" switch for 2 seconds or turn the ignition key OFF. (When "1-190" is displayed, the mode is transferred to LAN check mode.)

When starting up the diagnosis mode, the mode turns to LAN check mode, the screen displays the code numbers (physical address) of tuner and connected equipment. Smaller codes are displayed in order, displayed code numbers are switched by operating TUNE "UP" or "DOWN" switch, in LAN check mode, by pressing "5" of PRESET switch for more than 2 sees., diagnosis memory of each equipment can be deleted, when deletion is completed, the mode returns to LAN check mode.

Preset "T switch

Preset "6" switch

Preset "T switch

Preset "6" switch

"CD" switch

TUNE "UP" and "DOWN" switch

"CD" switch

TUNE "UP" and "DOWN" switch

Code No. (physical address) List

Code No. (physical address)

Equipment name

i90

nadio receiver assembly (Audio head unit)

(c) System check

(c) System check

When pressing "1" of PRESET switch in LAN check mode, the mode turns to the system check mode, the system performs self diagnosis of connected equipment and displays the results.("SYS" (showing the system is under detection) is displayed.)

Perform the operation shown in the following illustration, then read the result of the inspection.

HINT:

It sometimes takes approx. 40 sees. ti!l the system inspection is completed.

The chart below is an example of when diagnosis code "21" appears on the physical address (190) equipment. (ROM error occurs on the radio receiver.)

The smaller code numbers (physical address) are displayed in order (code No., diagnosis code, support code of diagnosis code (object equipment)). When no error is detected in the system, "00" is displayed.

When an error code is detected, up to 6 codes per one system are displayed. Pressing TUNE "UP" or "DOWN" switches the display. • In the system check mode, when pressing "6" of PRESET switch the mode returns to LAN check mode.

Pressing TURN DOWN'

Pressing TURN "UP'

H: This shows the equipment has a diagnosis code. 190: Physical address

1: This is the number allotted to the diagnosis code that occurred. 21: DTC No.

/ - S 1

♦ 4

1: This is the number allotted to the diagnosis code that occurred.

/----

t 4

- : NO DTC No.

Last Code No.

--------------------J

(1) In LAN check mode, when pressing "2" of PRESET switch the mode turns to the diagnosis memory mode. ("CODE" is displayed.)

The results of seif diagnosis performed over tuner and connected equipment are memorized and displayed.

(2) Perform the operation shown in the following illustration, then read the result of the inspection.

HINT:

The smaller code numbers (physical address) are displayed in order (code No., periodic communication number when error occurs, diagnosis code, and support code of diagnosis code (object equipment)).

• When no error is detected in the system, "00" is displayed. When an error code is detected, up to 6 codes per one system are displayed. Pressing TUNE "UP" or "DOWN" switches the display. Each diagnosis code is same as code in the system check mode.

When pressing "6" of PRESET switch, the mode returns to LAN check mode.

• The following illustration below is an example of when diagnosis code "D1" appears on the code (190) and (240 or 360) equipment. (Communication error occurs between the radio receiver and CD chang-er.)

8E-95

Pressing TURN UP '

Pressing TURN "DOWN *

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