radio MITSUBISHI MONTERO 2000 Service User Guide

CHASSIS ELECTRICAL -Radio/Tape Player54A-74
B. RADIO
B-1 No power is supplied when the switch is set to ON.
Is dedicated fuse No. 6 blown or is the circuitopen?YESReplace fuse or repair harness.
NO
Is the connector at the back of the radio connected properly?NOConnect connector securely.
YES
Disconnect and check the connector at the rear of the radio.
Is the ACC power (12 V)being supplied to the radio?NORepair harness.
YES
Repair or replace radio.
B-2 No sound from one speaker.
Check to see if there is any sound
when attached to another radio.YESRepair or replace radio.
NO
Remove the connector on the back
of the radio and check the speaker
harness for conductance.YESIt conducts electricity but is shorted
out.Repair speaker harness.
NO
Check the speaker for conductance.YESRepair speaker harness and ensure
proper connection of relay connec-
tors.
NO
Repair or replace speaker.


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CHASSIS ELECTRICAL -Radio/Tape Player54A-75
B-3 There is noise but no reception for UKW/MW/LW or no sound from UKW/MW/LW.
OK
Is the checkbeing conducted under
special electrical field conditions?YES
Example: In an under-
ground garage or inside a
building.
NO
Does tuning solve the problem?
Is proper performance obtained when
the vehicle is moved?YES
OKYES
NO
NO
ReconnectNOAre the antenna plug and radio unit properlycon-
nected?
YES
Repair or replace radio.YESDoes the problem disappear if connected to another
radio?
NO
Replace the antenna.
B-4 Insufficient sensitivity.
NO
Replace the antenna.
YES
Repair or replace radio.YESDoes the problem disappear when a different radio is
connected?
OK
Is the checkbeing conducted under
special electrical field conditions?YES
Example: In an under-
ground garage or inside a
building.
NO
Does tuning solve the problem?
Is proper performance obtained when
the vehicle is moved?YES
OKYES
NO
NO
Electrical field condition relatedYESIs the problem limited to the reception of a specific
radio station from a specific position?
NO
Ensure proper connection.NOIs the antenna plug properly connected to the unit?


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CHASSIS ELECTRICAL -Radio/Tape Player54A-76
B-5 Distortion on UKW/MW/LW.
How much distortion is there?OccasionalDistortion in the vicinity of the radio
stationYESExcessiveantenna input
Constant
NO
Are the speaker cords in contact with the cone paper?YESRemove cords away from cone paper.
NO
Remove the speakers and check for torn cone paper or for-
eignobjects.YESRepair or replace speakers.
NO
Check for deformation with speaker installed.YESInstall speaker securely.
NO
Repair or replace radio.
B-6 Too few automatic select stations.
OK
Is the checkbeing conducted under
special electrical field conditions?YES
Example: In an under-
ground garage or inside a
building
NO
Is the antenna plug properly connected to the equip-
ment?
Is proper performance obtained when
the vehicle is moved?
Ensure proper connection.NO
NO
YES
Repair or replace radio.YESDoes the equipment work properly if the radio is
changed?
NO
Replace the antenna.YES


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CHASSIS ELECTRICAL -Radio/Tape Player54A-77
B-7 Insufficient memory (preset stations are erased).
Is dedicated fuse No. 5 blown or is the circuitopen?YESReplace fuse or repair harness.
NO
Disconnect and check the connector at the rear of the radio.
Is the memory backup (battery) powerbeing supplied?NORepair harness.
YES
Repair or replace radio.
C. TAPE PLAYER
C-1 Cassette tape will not be inserted.
Are there any foreign objects in the tape player?YESRemove the object(s)*1.
NO*1
Attempting to force a foreign object (e.g., a coin or clip, etc.)
out of the tape player maydamage the mechanism. The
player should be taken to a service dealer for repair.
Does the tape player work if another tape is inserted?YESReplace tape*2.
NO
Repair or replace tape player.
*2
Ensure that the tape label is not loose, that the tape itself is
not deformed and that the tape is tightly wound. Also, tape of
C-120 or greater length often get caught in the mechanism
and should not be used.
C-2 No sound (even after a tape has been inserted).
Is dedicated fuse No. 6 blown or is the circuitopen?YESReplace fuse or repair harness.
NO
Is connector at rear of radio connected tightly?NOConnect connector firmly.
YES
Disconnect connector at rear of radio. Is ACC powerbeing
supplied to the radio?YESRepair or replace tape player.
NO
Repair harness.


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CHASSIS ELECTRICAL -Radio/Tape Player54A-78
C-3 No sound from one speaker.
Clean the tape playerhead andcheck again.YESOK
NO
Replace the tape player and check again.YESRepair or replace tape player.
NO
Remove the connector on the back of the radio and
check the speaker harness for conductance.YESIt conducts electricity but is
shorted out.Repair harness.
NO
Check the speaker for conductance.YESRepair harness.
NO
Repair or replace speaker.
C-4 Sound quality is poor, or sound is weak.
Does the player play properly when another tape* is inserted?YESOK
NO
*:
DEnsure that the tape label is not loose, that the
tape itself is not deformed and that the tape is
tightly wound.
DTapes of C-120 or greater length often get caught
in the mechanism and should not be used.
Does the player play properly when the tape playerhead is cleaned?YESOK
NO
Is proper operation obtained when the tape player is replaced?YESRepair or replace tape player.
NO
Repair or replace speaker.
C-5 Cassette tape will not be ejected.
The problems covered here are all the result of
the use of a bad tape (deformed or not properly
tightened) or of a malfunction of the tape player
itself. Malfunctions involving the tape becoming
caught in the mechanism and ruining the case arealso possible, and attempting to force the tape out
of the player can cause damage to the mechanism.
The player should be taken to a service dealer
for repair.


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CHASSIS ELECTRICAL -Radio/Tape Player54A-80
C-8 Tape gets caught in mechanism*1.
*1
When the tape is caught in the mechanism, the case
may not eject. When this occurs, do not try to force
the tape out as this maydamage the tapeplayer
mechanism. Take the cassette to a service dealer for
repair.
Does the player play OK if the tape*2is changed?YESTape used is bad.
NO
*2
Ensure that the tape label is not loose, that the tape
itself is not deformed and that the tape is tightly
wound. Also, tapes of C-120 or greater length often
get caught in the mechanism and should not be used.
Repair or replace tape player.


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CHASSIS ELECTRICAL -RV Meter54A-22
Inspection procedure 7
Audio information does not display normally.
Replace the RV meter.
NG
Replace the radio and tape, CD
player
(1)
Check the trouble symptoms.
Carry out a service function
communication and wiring check. One
of the following M-BUS outputs will
appear.
(1) E1 (Communication error)
(2) E2 (Open circuit or short-circuit)
(3) OKMeasure the wave pattern at RV meter
connector D-40.
DConnector disconnected
DVoltage between terminal (7) and
body earth
DVoltage between terminal (8) and
body earth
DVoltage between terminal (17) and
body earth
OK:Hi: 4 - 5 V
Lo: 0 - 1 V
Malfunction of radio and tape, CD
player OK
(2)
Check the harness between the RV
meter and the radio and tape, CD player,
and repair if necessary. (3)
YESOK
NG
Is error message “004” shown?NOReplace the RV meter.
NOTE:
The contents of error messages shown in the audio display screen are as follows:
Error messageLocation and cause of malfunction
EJECTA magazine for CD changeris not inserted.
NO DISCCD is not inserted.
ERROR 001Program error in audio
ERROR 002Error in CD disk
ERROR 003Mechanical error in audio system
ERROR 004Communication error in audio systemand RV meter,power supply error in audio
system, and other errors
ERROR HOTHeat protection for audio system


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