Audio System€¦ · 20.06.2008 · Fade Out Because FM radio waves are of higher frequencies than AM radio waves, they bounce off of buildings, mountains, and other obstructions

AUDIO SYSTEMParts Location

−BODY ELECTRICAL SYSTEM Audio SystemBE−132

Wiring and Connector Diagrams




SERVICE AREAThere is great difference in the size of the service area forAM, FM monaural, and FM stereo broadcasting. Thus it mayhappen that FM broadcast cannot be received even thoughAM comes in very clearly.Not only does FM stereo have the smallest service area, butit also picks up static and other types of interference(”noise”) the most easily.

RECEPTION PROBLEMSBesides the problem of static, there are also the problemscalled ”fading”, ”multipath”, and ”fade out”. These problemscare caused not by electrical noise but by the nature of theradio waves themselves.FadingBesides electrical interference, AM broadcasts are also sus-ceptible to other types of interference, especially at night.This is because AM radio waves bounce off the ionosphereat night. These radio waves then interfere with the signalsfrom the same transmitter that reach the vehicle’s antenna di-rectly. This type of interference is called ”fading”.MultipathOne type of interference caused by the bouncing of radiowaves off of obstructions is called ”multipath”. Multipath oc-curs when a signal from the broadcast transmitter antennabounces off of buildings and mountains and interferes withthe signal that is received directly.Fade OutBecause FM radio waves are of higher frequencies thanAM radio waves, they bounce off of buildings, mountains,and other obstructions. For this reason, FM signals oftenseem to gradually disappear or fade away as the vehiclegoes behind a building or other obstruction. This is called”fade out”.

System DescriptionRADIO WAVE BAND

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

LF: Low Frequency M F: Medium Frequency H F: High Frequency VHF: Very High Frequency


COMPACT DISC PLAYERCompact Disc (hereafter called ”CD”) 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. There are 4.7 in. (12 cm) and 3.2.in. (8 cm) CD available.HINT: Never attempt to disassemble or oil any part of the player unit. Do not insert any object otherthan a disc into the slot.NOTICE. CD players use invisible laser beam which could cause hazardous radiation explo-sure if directed. Be sure to operate the player correctly as instructed.

MAINTENANCE(Tape Player)

Head CIeaning(a) Raise the cassette. door with your finger.

Next using a pencil or like object, push in theguide.

(b) Using a cleaning pen or cotton applicator soakedin cleaner, clean the head surface, pinch rollersand capstans.

(CD Player)Disc CleaningIf the Disc gets dirty, clean the Disc by wiping the sur-faces from the center to outside in the radial directionswith a soft cloth.NOTICE: Do not use a conventional record cleaner oranti−static record preservative.

AUDIO TYPESExample:


Audio system type and symbol used.

HINT: Confirm the applicable type of audio system. (See page BE−137).

Symbol for type of audio system the question applies to.

HINT: 1f the audio system type is not applicable, proceed to next question below.

Junction without black circle.

HINT: Proceed to next question below.

Junction with black circle.

HINT: Proceed to question for applicable audio system type.

HINT: Select question for applicable audio system type.

HOW TO USE DIAGNOSTIC CHART


1. SETTING SYSTEMThe system is in operation once the customer has pushed the required buttons and entered the custom-er−selected 3−digit I D number.(Refer to the Owner’s Manual ”SETTING THE ANTI−THEFT SYSTEM”)HINT:

• When the audio system is shipped the I D number has not been input, so the anti−theft systemis not in operation.

• If the ID number has not been input, the audio system remains the same as a normal audio system.2. ANTI−THEFT SYSTEM OPERATION

If the normal electrical power source (connector or battery terminal) is cut off, the audio system be-comes inoperable, even if the power supply resumes.

3. CANCELLING SYSTEMThe ID number chosen by the customer is input to cancel the anti−theft system.(Refer to the Owner’s Manual ”IF THE SYSTEM IS ACTIVATED”)HINT: To change or cancel the ID number, please refer to the owner’s Manual ”CANCELLING THESYSTEM”.

Anti−Theft SystemThe anti−theft system is only provided for audio systemsequipped with an Acoustic Flavor function. _HINT: The words ”ANTI−THEFT SYSTEM” are displayedon the cassette tape slot cover.For operation instructions for the anti−theft system,please consult the audio system section in the Owner’sManual.


TroubleshootingNOTICE: When replacing the internal mechanism (computer party of the audio system, be careful that nopart of your body or clothing comes in contact with the terminals of the leads from the IC, etc.¿of the replacment part (spare part).HINT: This inspection procedure is a simple troubleshooting which should be carried out on the vehicleduring system operation and was prepared on the assumption of system component troubles (except forthe wires and connectors, etc.).Always inspect the trouble taking the following items into consideration.

• Open or short circuit of the wire harness

• Connector or terminal connection fault

• For audio systems with anti−theft system, troubleshooting items marked (*) indicate that”Troubleshooting for ANTI−THEFT SYSTEM” should be carried out first.

Tape jammed, malfunction with tape speed or auto−reverse.

Noise produced by vibration or shock while driving.

Power coming in, but tape player not operating.

Power coming in, but CD player not operating.

Noise present, but AM − FM not operating.

Power coming in, but radio not operating.

APS, SKIP, RPT buttons not operating.

Noise produced when engine starts.

Sound quality poor (Volume faint).

Cassette tape inserts, but no power.

Sound quality poor (Volume faint).

Cassette tape cannot be inserted.

Reception poor (Volume faint).

Either AM or FM does not work.

Cannot set station select button.

Either speaker does not work.



Cassette tape will not eject.

Preset memory disappears.

Few preset tuning bands.

C D inserts, but no power.

CD cannot be inserted.

No power coming in.

Sound quality poor.

CD will not eject.

Antenna − related.

Sound jumps.

Tape Player

CD Player

Problem

Antenna

Radio

Noise

No.

*15


HINT:• Refer to Owner’s Manual for operation details of ANTI−THEFT SYSTEM. ,• When the ID number has been cancelled, reset the same number after completing the operation, or in-

form the customer that it has been cancelled.

ANTI−THEFT SYSTEM operatingcondition.(ID number input error 5 times)Take to designated radio service station.

TROUBLESHOOTING FOR ANTI−THEFT SYSTEM

While holding the 1, 4 and 6buttons in. Push and hold the”PWR VOL” knob.Check display.

ANTI−THEFT SYSTEM operatingcondition.(ID number input error 4 times or less)

ANTI−THEFT SYSTEM not cancelled. ID number input 5 times or more?

(Liquid Crystal Display (LCD) for Audio System)

Turn ignition key from LOCK position to ACC position.

ANTI−THEFT SYSTEM cancelled.Check audio system again.

Cancel ID number, refer to each malfunction item.

Cancel ID number, refer to each malfunction item.

Normal operation when radioswitch turned ON.

Take to designated radio service station.

”SEC” display disappearsafter 1 second.

After 2 secondsDisplay ”C” →”A”

ID number not input. (Display ”D”)

ID number not input, orelse input error.

Input ID number, check display.

Refer to each malfunction item.Radio switch turned 4N.

Display ”B” showing?

Forgot to press switch.

Display ”A” showing?

Display ”A” or B

ID number is set.

Display ”B”

Display ”D”

Display ”E”

Go to No.1.

Yes

Yes

Yes

Yes

Yes


Radio Radio −Tape Player Unit (Built−in Power Amplifier)Radio −Tape Player Unit (Separate Power Amplifier)

Check if GND (wire harness side) to radio isOK?

Is ACC for the radio assemblybeing output from the poweramplifier?

Check if GND (wire harness side) to power amplifier is OK?

Check if GND (wire harness side) to radio is OK?

1 RADIO NO POWER COMING IN

Is there continuity in GNDwire harness?

Is ACC applied to power amplifier?

Is tape player operating normally?

Is ACC applied to radio assembly?

Check if CIG & RAD fuse is OK?

Power amplifier faulty.

ACC wire harness faulty.


Is ACC applied to radio?

Radio assembly faulty.



Replace fuse.

GND faulty.

Radio faulty.

Yes

Yes

Yes

Yes

Yes

Yes


: Radio : Radio −Tape Player Unit (Built−in Power Amplifier): Radio −Tape Player Unit (Separate Power Amplifier): Antena w/o Motor : Motor Antenna Motor Antenna and Glass Printed Antenna

2 RADIO POWER COMING IN, BUT RADIO NOT OPERATING

Do speakers pops when the volume switch isturned to maximum and then the power isswitched ON?

Is power for the antenna being output from the poweramplifier?

Is power for the antennabeing out put from the radioor radio assembly?

Temporarily install another speaker.Function OK?

!s there continuity in speaker wireharness?

Power amplifier faulty. Recheck system after repair.

Is power for the antenna beingoutput from the radio?

Radio assembly faulty. Recheck system after repair.


Hissing sound from speaker?

Speaker wire harness faulty.

Power amplifierfaulty.

Radio assemblyfaulty.



If radio sidefaulty

If radio side faulty


Go to No. 23.

Speaker faulty.

G o to No. 23.

G o to No. 23. Radio faulty.

Radio faulty.

Yes

Yes

Yes

Yes

Yes

Yes



Radio Radio −Tape Player Unit (Built−in Power Amplifier)Radio − Tape Player Unit (Separate Power Amplifier)

3 RADIO NOISE PRESENT, BUT AM−FM NOT OPERATING

4 Radio EITHER SPEAKER DOES NOT WORK

Is power for the antenna being output from the radio or radio assembly?

Is power for the antenna being output fromthe power amplifier?

Temporarily install another speaker.Functions OK?





Is hiss produced by non−functioning speaker?

Is there continuity in speaker wire harness?



Radio or radio assembly faulty.










Speaker faulty.

Radio faulty.

Radio faulty.

Go to No. 23.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No


Radio Radio −Tape Player Unit (Built−in Power Amplifier)Radio −Tape Player Unit (Separate Power Amplifier)Yes

EITHER AM OR FM DOES NOT WORK, RECEPTIONPOOR (VOLUME FAINT), FEW PRESET TUNING BANDS

Is power for the antenna being output from the radio or radio assembly?

Is power for the antenna being output fromthe power amplifier?

Problem with radio wave signals orlocation? (See page BE−123)





Are both AM and FM defective?


Poor signals, poor location.






Speaker faulty.

Go to No. 23.

Radio faulty.

Radio faulty.

Radio

Yes

Yes

Yes

Yes

Yes

Yes

5


U Radio − Tape Player Unit (Built−in Power Amplifier)Player Unit (Separate Power Amplifier)

Radio assembly or power amplifier faulty. Recheck system after repair.

Is power for the antenna beingoutput from the radio or radioassembly?

Is power for the antennabeing output from the poweramplifier?

Temporarily install another speaker.Function OK?

SOUND QUALITY POOR

No



Is sound quality bad incertain areas only?

Poor signals, poorlocation.

Is sound quality always bad?

Is speaker properly installed?

RadioRadio − Tape

Power amplifierfaulty.

Radio or radioassembly faulty.




If radio sidefau Ity

NoYes Install properly.

Speaker faulty.

Go the No. 23.

Go to No. 23.

Radio faulty.

Radio faulty

Radio

Yes

Yes

Yes

Yes

Yes

0)



CANNOT SET STATION SELECT BUTTON,PRESET MEMORY DISAPPEARS

Check if G N D (wire harness side) to radio or radioassembly?

Check if GND (wire harness side) to power amplifier?

Can cassette tape be inserted i n tape player?

is + B applied to radio or radio assembly?

Is + B applied to power amplifier?


Check if DOME fuse is OK?

+ B wire harness faulty.





Replace fuse.

G N D faulty.

G N D faulty.

Radio

Yes

Yes

Yes

7


Radio − Tape Player Unit (Built−in Power Amplifier)Radio −Tape Player Unit (Separate Power Amplifier)

CASSETTE TAPE CANNOT BE INSERTED

1 s auto search button of radio operatingnormally?

Check if GND (wire harness side) to power amplifier is OK?

Check if GND (mire harness side) toradio assembly is OK?

Is there a foreign object inside tapeplayer?


Is +B applied to radio assembly?

Check if DOME fuse. is OK?

Remove foreign object.


+B wire harness faulty.




Tape Player


Replace fuse.

G N D faulty.

GND faulty.

Yes

Yes

Yes

Yes

8


Radio −Tape Player Unit (Built−in Power Amplifier)Radio −Tape Player Unit (Separate Power Amplifier)

Yes

CASSETTE TAPE INSERTS, BUT NO POWER

Is power for the radio assemblybeing output from the poweramplifier?


Is ACC applied radio assembly?

Check if CI G & RAD fuse is OK?

Is radio operating normally?






Tape Player

Replace fuse.

Yes

Yes

Yes

9



Yes

Radio −Tape Player Unit (Built−in Power Amplifier)Radio − Tape Player− Unit (Separate Power Amplifier) Yes

POWER COMING IN, BUT TAPE PLAYER NOTOPERATING

EITHER SPEAKER DOES NOT WORK

Functions OK if different cassette tapeinserted?

Is hiss produced by non−functioningspeaker?



Is there continuity in speaker wireharness?











Tape Player






Tape Player

Cassette tape faulty.

Speaker faulty.

Speaker faulty.

Yes

Yes

Yes

YesYes

Yes

Yes

10

11


Radio −Tape Player Unit (Built−in Power Amplifier)Radio −Tape Player Unit (Separate Power Amplifier)Yes

TAPE JAMMED, MALFUNCTION WITH TAPESPEED OR AUTO−REVERSE

Cassette tape faulty. (Less than 3 secs. of silence between songs (APS, RPT). Less than 15 secs. of silence (SKIP).)

SOUND QUALITY POOR (VOLUME PAINT)

APS, SKIP, RPT BUTTONS NOT OPERATING

Operates normally after cleaning theheads? (See page BE−137)

Functions OK if different tape (lessthan 120 mins.) is inserted?

Is there a foreign object inside tapeplayer?

Functions OK if different cassettetape inserted?


Function OK if different cassettetape inserted?

Operates normally after cleaning theheads? (See page BE−137)

Radio assembly or power amplifier faulty.


1s radio operating normally?

Remove foreign object.





Tape Player

Tape Player

14 Tape Player



Install properly.

Speaker faulty.

Head dirty.

Head dirty.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

13



No

CASSETTE TAPE WILL NOT EJECT

Is auto search button of radiooperating normally?

Is +B applied to power amplifier?


Is + B applied to radio assembly?




Tape Player


Cassette tape jammed.



Replace fuse.

Yes

Yes

Yes

Yes

15


Is there continuity in ACC wire harnessbetween the radio assembly and thepower amplifier?

Check if G N D (wire harness side) to poweramplifier is OK?

Check if GND (wire harness side) to radioassembly is OK?

Is auto search button of radio operatingnormally?

CD INSERTS, BUT NO POWER

CD CANNOT BE INSERTED

Check if G N D (wire harnessside) to CD player is OK?


Is ACC applied to radio assembly?


Is +B applied to radio assembly?

Check if ClG & RAD fuse is OK?

Is ACC applied to CD player?

Is + B applied to C D player?

Is radio operating normally? Radio assemblyfaulty.

Radio assemblyfaulty.



+ 8 wire harness faulty.

Is CD already inserted?

Power amplifier faulty.Radio assembly faulty.



16 CD Player

17 CD Player

CD player faulty.

CD player faulty.

Replace fuse.

Replace fuse.

G N D faulty.

Eject CD.Yes −

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes


18 CD Player POWER COMING IN, BUT CD PLAYER NOT OPERATING





Has sudden temperature changeoccurred inside cabin?

Has sudden temperature changeoccurred inside cabin?

Does sound jump only during strongvibration?

Formation of condensation due to temp. change.

Functions OK if different CDi nserted?

Formation of condensationdue to temp. change.

Functions OK if different CD inserted?

Protective circuit inoperation.

!s CD player properly installed?

!s temperature inside cabin hot?

Is CD inserted correct side up?

Jumping caused by vibration.




SOUND JUMPS19 CD Player

Insert correctly.

CD player faulty.

CD player faulty.

Install properly.

Speaker faulty.

CD faulty.

C D faulty.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes


SOUND QUALITY POOR (VOLUME FAINT)

EITHER SPEAKER DOES NOT WORK

Is hiss produced by non−functioningspeaker?

Temporarily install another speaker.Functions OK.


Radio assembly, CD player or power amplifier faulty.




Functions OK if different CDi nserted?





20 CD Player

21 CD Player

CD player faulty.

CD player faulty.

Install properly.

Speaker faulty.

Speaker faulty.

CD faulty.

Yes

YesYes

Yes

Yes

Yes

Yes

Yes


Is there continuity in + Bwire harness between theradio assembly and thepower amplifier?

Is auto search button of radiooperating normally?

CD WILL NOT EJECT

Is + B applied to CD player?


Is + B applied to radio assembly?

Radio assembly fauIty.






22 CD Player

CID player faulty.

Replace fuse.

Yes

Yes

Yes

Yes

Yes


Motor Antenna and Glass Printed Antenna

Check continuity between antenna motorcontrol relay and radio.

Is power related to the antenna being input to the antenna motor control relay?

Inspect antenna motor control relay.(Relay circuit) (See page BE−159 )

Temporarily install another antenna.Functions OK?

Temporarily install another antenna.Functions OK?

Does antenna extend when radioswitch ON?

Inspect glass printed antenna(See page BE−159)

Inspect antenna motor. (See page BE−159)

ANTENNA−RELATED

Glass printedantenna faulty.

Motor antennafaulty.

Antenna w/o Motor

Wire harness faulty.

Antenna motor faulty.

Motor Antenna

!s antenna extended?

Relay circuit faulty.

Radio side faulty.

Radio side faulty.

Radio side faulty.

Antenna faulty.

23 Antenna

Relay faulty.

Extend fully.

Yes

Yes

Yes

Yes

Yes


NOISE PRODUCED BY VIBRATION OR SHOCKWHILE DRIVING

Clicking sound heard when horn button is pressed,then released. Whirring/grating sound whenpushed continuously.

Whistling noise which becomes high−pitched whenaccelerator strongly depressed, disappears shortlyafter engine stops.

Scratching noise occurs during sudden acceleration,driving on rough roads or when ignition switch isturned on.

Scratching noise occurs while engine is running, continues a while even after engine stops.

NOISE PRODUCED WHEN ENGINE STARTS

With vehicle stopped, lightly tap each system.Is noise produced?

Tick−tock noise, occurs in co−ordination with blinking of flasher.

Noise produced by static electricity accumulating in the vehicle body.

Noise occurs during window washer operation.

Whining noise occurs when A/C is operating.

Murmuring sound, stops when engine stops.

Scraping noise in time with wiper beat.

Is each system correctly installed?


Water temp. gauge noise.

Other type of noise.

Each system faulty.

Fuel gauge noise.

Turn signal noise.

Install properly.

Alternator noise.

Ignition noise.

Washer noise.

Wiper noise.

Horn noise.

A/C noise.

24 Noise

25 Noise

No−

Yes

Yes

Yes

Yes

Yes

Yes

Yes

YesYes

Yes

Yes

Yes


Parts Inspection1. INSPECT ANTENNA MOTOR

(a) Connect the positive (+) lead from the battery tb ter-minal 1 and the negative (−) lead to terminal 4.

(b) Check that the motor turns (moves upward).NOTICE: These tests must be performed quickly(within 3−5 seconds) to prevent the coil from burning out.

If circuit is as specified, replace the relay.3. INSPECT GLASS PRINTED ANTENNA

(Use same procedure as for ”INSPECT DEFOGGERWIRES” on page BE−65.)

4. REPAIR GLASS PRINTED ANTENNA(Use same procedure as for ”REPAIR DEFOGGERWIRES” on page BE−66.)

(c) Then, reverse the polarity, check that the motor turnsthe opposite way (moves downward) .

NOTICE: These tests must be performed quickly(within 3−5 seconds) to prevent the coil from burningout.If operation is not as specified, replace the motor.

2. INSPECT ANTENNA MOTOR CONTROL RELAY(Relay Circuit)Disconnect the connector from the relay and inspect theconnector on wire harness side as shown in the chart.

Ignition switchposition

Radio switch OFFor cassette ON

Radio switch andcassette OFF

Radio switch ONand cassette OFF

Radio switch orcassette ON




Tester connection Specified value

Battery voltage

Battery voltage

Battery voltage

Battery voltage

Battery voltage

LOCK or ACC

No voaltage

No voltage

No voltage

No voltage

No voltage

No voltage

Continuity

8 − Ground

Continuity

6 − Ground

9 − Ground

3 − Ground

ACC or ON

2−Ground

5 − Ground

Continuity

ACC or 0 N

Condition

ACC or ON

Check for

ConstantConstant

ConstantVoltage

LOCK

LOCK

LOCK

1−4


Documents

Audio System€¦ · 20.06.2008 · Fade Out Because FM radio waves are of higher frequencies than AM radio waves, they bounce off of buildings, mountains, and other obstructions