1995 MITSUBISHI 3000GT switch

Downloaded from www.Manualslib.com manuals search engine 54-164CHASSIS ELECTRICAL - Radio and Tape Player
A-6There is noise when starting the engine.
Noise type
Sounds are in pa-
rentheses ( ).
AM, FM:
Ignition noise
(Popping, Snap-
ping,Cracking,
Buzzing)
Otherelectrical
components
Static electricity
(Cracking, Crin-
kling)
Conditions
0Increasing the engine speedcausing the popping sound tospeed up, and volume de-creases.0Disappears when the ignitionswitch is turned to ACC.
-
lDisappears when the vehicle is
completely stopped.Occurs when parts or wir-
Severe when the clutch is en-ing move for some reasonlgaged.and contact metal parts of
the body.
lVarious noises are produced de-pending on the body part of thevehicle.
Due to detachment from
the body of the front hood,
bumpers, exhaust pipe
and muffler, suspension,
etc.
Causel
Mainly due to the
spark plugs.l Due to the enginenoise.
Noise may appear as
electrical components be-
come older.
Parts to be Location of
inspectedparts
or remedy(next page)
Noise con- 1
denser
Ground
cable2, 3
Repair or replace electricalcomponents.
Return parts or wiring to
their proper position.
Caution
1.Connecting a high tension cable to the noise
filter may destroy the noise filter and shouldnever be done.
2.Check that there is no external noise. Since
failure to do this may result in misdiagnosis
due to inability to identify the noise source,
this operation must be performed.3. Noise prevention should be performed by
suppressing strong sources of noise step
by step.
NOTE
1. Condenser
The condenser does not pass D.C. current, butas the number of waves increases when it
passes A.C. current, impedance (resistanceagainst A.C.) decreases, and current flow is
facilitated. A noise suppressing condenser
which takes advantage of this property is in-
serted between the power line for the noise
source and the ground. This suppresses noiseby grounding the noise component (A.C. or
pulse signal) to the body of the vehicle.
2. Coil
The coil passes D.C. current, but impedance
rises as the number of waves increases relativeto the A.C. current. A noise suppressing coil
which takes advantage of this property is in-
serted into the power line for the noise source,
and works by preventing the noise componentfrom flowing or radiating out of the line.
1 TSB Revision
Ground parts by bonding.
Cases where the problem
is not eliminated by a single
response to one area are
common, due to several
bodypartsbeing
imperfectly grounded.

Downloaded from www.Manualslib.com manuals search engine 54-166CHASSlS ELECTRICAL - Radio and Tape Player
IA-7Some noise appears when there is vibration or shocks during traveling.
‘d ~
Are connectors properly connected?
YesNo
---+ Ensure proper connection
t
Does noise appear when the radio switch is turned on while theNovehicle is stopped and the radio is struck while tuned away fromLa station?
YesStatic electricity noise:
Body static electric from the shock absorber rubber bushings used
to prevent vibration, tires, etc. occurs because of separation fromthe ground, causing a buzzing noise.
Since no measures can be taken on the radio side, steps shouldbe taken to discharge the static electricitv of the vehicle bodv.
tIs the radio correctly grounded?
(Is the mounting screw tightened securely?)
1 Yes
tIs the antenna correctly grounded? (If noise appears when the Nocantenna is moved, this means the ground is not securely con-
nected.)
If rust is present on the antenna ground screw, clean and tightenthe ground securely.
Yes
1 Reoair or reolace radio.1
TSB Revision

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-167
A-8Noise sometimes appears on FM during traveling.
NoIs the antenna completely extended?
Yes
t Check the antenna itself.
(Refer to E-l, 2.)
+Does the problem clear up whenre
1 No
Yes
iDoes the problem appear only in certain locations and only with yes
certain stations?
No
~ Due to electrical field conditions. (Multipath
noise*, fading noise*).
Are connectors property connected?
Yes
Check connector connections.1
tDoes noise appear when the radio switch is turned on while the
vehicle is stopped
and the radio is struck while tuned away froma station?
Yes
No*Static electricity noise:Sody static electric from the shock absorberrubber bushings used to prevent vibration, tires,etc. occurs because of separation from the
ground, causing a buzzing noise.
Since no measures can be taken on the radioside, steps should be taken to discharge the
static
electricitv of the vehicle bodv.
Is the radio body correctly grounded?
No(Is the mounting screw tightened securely?
)
Yes
-) Tighten the screw securely.I
Is the antenna correctly grounded? (If noise appears when the antennais moved, this means the ground is not securely connected.)
Yes
If rust is present on the antenna ground screw,clean and tighten the ground securely.
*
1 Repair or replace radio.1
About multipath noise and fading noise
Because the frequency of FM waves is extreme-
ly high, it is highly susceptible to effects from
geological formations and buildings. These ef-
fects disrupt the broadcast signal and obstruct
‘reception in several ways.l Multipath noise
This describes the echo that occurs when the
broadcast signal is reflected by a large obstruc-
tion and enters the receiver with a slight time
delay relative to the direct signal (repetitious
buzzing).l Fading noise
This is a buzzing noise that occurs when the
broadcast beam is disrupted by obstructing ob-
jects and the signal strength fluctuates intricately
within a narrow range.
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-168CHASSIS ELECTRICAL - Radio and Tape Player
IA-9Ever-present noise.I
Noise is often created by the following factors, and
often the radio is OK when it is checked individually.l Traveling conditions of the vehicle
l Terrain of area traveled through
l Surrounding buildings
l Signal conditions
l Time periodFor this reason, if there are still problems with noiseeven after the measures described in steps A-l
to A-8 have been taken, get information on the fac-
tors listed above as well as determining whetherthe problem occurs with AM or FM, the station
names, frequencies, etc., and contact a service cen-
ter.B. RADIO
IB-lNo power is supplied when the switch is set to ON.IIIIs multi-purpose fuse No. 4 blown or is the circuit open?Replace fuse or repair harness.
NoIs the connector at the back of the radio connected properly?
Yes
Connect connector securely.1t
NoDisconnect and check the connector at the rear of the radio. Is the ACC / Repair harness.
power (12 V) being supplied to the radio?J
I
Yes
1 Reoair or reolace radio.
1 B-2No sound from one speaker.ICheck to see if there is any sound when attached
to another radio.
I-=----[Repair or replace radio unit.
No
checkthespeakerharnessfor conductance.
out.*Speakarj
NoRepair speaker harness and ensure
proper connection of relay connectors.
tRepair or replace speaker.
1 TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-178CHASSIS ELECTRICAL - Radio and TaDe Plaver
D. CD PLAYER
D-lCD will not be accepted.
Does the shutter open when a CD is inserted? l l
YesTake out the CD.
1 Yes
tThough CD is completely inserted once, “e
CD is rejected? l 3No-l
Yes
tCheck CD.l Is the labeled side faced downward?
l Is the recorded face of the CD dirty?
l Does dew exit on the recorded face of the CD?- Yes- Insert the CD correctly or check to see if the
CD is defective.
No
l 1‘2
‘3
tReplace CD.If the CD is already loaded, doesn’t the shutter open to allow
insertion when another CD is inserted?
If the key switch is not at ACC or ON, the CD stops at depth
of 15 mm below the panel surface even when it is inserted, andit will be rejected when pushed farther?
Even though the CD is loaded, E (error) is sometimes displayedwith the CD rejected because of vibration/ shock or dew on the
CD face or optical lens.
TSB Revision

Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Taste Plaver
D-4Sound quality is poor.1Does it play properly if another proper CD is loaded?
No
Replace CD.Repair or replace CD player.
1 D-5CD will not be ejected.Is the key switch (ignition key) at ACC or ON?
YesTurn the key to ON.
tIs the combined amplifier or radio set connected securely?
YesSecurely connect the subjected one.
If CD is not ejected, don’t reject it.
The player may be damaged. Therefore, contact a service
shop for reoairs.
D-6No sound from one speaker.Is CD player securely connected to the combined radio set?
YesSecurely connect them.
Does it play properly if another CD player is combined?
NoRepair or replace CD player.
IRepair or replace the combined radio set.
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Radio and Tape Player54-181
E. MOTOR ANTENNA
LE-lMotor antenna won’t extend or retract.
Clean and polish the surface of the antenna rod.Is the radio power switch ON?
Yes
Switch it ON.Is voltage (approx. 12 V) emitted to the radio’s motor antenna terminal’?
YesRepair or replace the radio.i
tIs the antenna bent?
No
tIs the antenna relay OK?
Yes
Replace the antenna relay.
iIs the motor OK?
YesNo
c
Repair the harness.I-
TSB Revision. Replace the motor.

Downloaded from www.Manualslib.com manuals search engine 54-186
CHASSIS ELECTRICAL - Radio and Tape Player
RADIO REMOTE-CONTROL
REMOVAL AND INSTALLATION
CAUTION: SRSBefore removal of air bag module, refer to GROUP 52B -Service Precautions and Air Bag Module and Clock Spring.
When removing and installing the remote control switch,
don’t allow any impact or shock to the air bag module.cup to 1993 models>

2.5 Nm1.8 ft.lbs.
Removai steps
1. Air bag module (Refer to GROUP
528 -Air Bag Module and Clock Spring.)
2. Radio remote control switchRADIO AND TAPE PLAYER
REMOVAL AND INSTALLATION2 4
Vehicle without

Z16FO49100002403
Removal steps
1. Radio panel2. Radio and tape player
3. CD player4. Radio bracket5. Front console assembly (Refer to GRbUP
52A - Console Box.)
1 TSB Revision