Mitsubishi Outlander GS45X. Manual — part 104

RADIO AND CD PLAYER

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CHASSIS ELECTRICAL

54A-413

STEP 3. Check that the noise fades away by the
following actions.
(1) Tune to a station with a stronger wave.
(2) Adjust the sound quality to suppress high tones.

Q: Is the noise eliminated?

YES :

This diagnosis is complete.

NO :

Go to Step 4.

STEP 4. Check that the radio and CD player is
correctly grounded
The radio is connected to the ground with an assem-
bling screw.

Q: Is the radio correctly grounded?

YES :

Go to Step 5.

NO :

Assemble the radio and CD player into the
vehicle.

STEP 5. Check the antenna plug is connected to
the radio and CD player.

Q: Is the antenna plug thoroughly connected to the

radio and CD player?
YES :

Go to Step 7.

NO :

Go to Step 6.

STEP 6. Check that the noise is eliminated when
the antenna plug is properly attached.

Q: Is the noise eliminated?

YES :

This diagnosis is complete.

NO :

Go to Step 7.

STEP 7. Check that the antenna is in good
condition and is it properly mounted.

Q: Is the antenna in good condition and is it properly

mounted?
YES :

Consult the radio manufacturer's service

center.

NO :

Repair or replace the roof antenna.

INSPECTION PROCEDURE 11: There is more noise on either AM or FM.

DIAGNOSIS

• More noise comes out from AM only.

• AM is easily interfered by the engine, power

line, and thunder.

• More noise comes out from FM only.

• Due to the property of FM waves, reflection

and interference occur. Thus, noise are easily
caused by interference of buildings and
mountains.

STEP 1. Check which comes out more noise, AM
or FM.

Q: Which comes out more noise, AM or FM?

AM :

Go to Step 2.

FM :

Refer to (Refer to Inspection Procedure 12

P.54A-414

)

STEP 2. Check that there is noise under the
following state(s).

• A motorcycle was passing.

• The levin was flashing.

• A vehicle passed close by, but it appeared to be a

vehicle generating a particularly large amount of
noise radiation.

• Passed beneath a power line.

• Passed beneath a telephone line.

• Passed close by a signal generator.

• Passed close by some other sources of electrical

noise.

• Passed under a bridge.

Q: Is there noise in the above states?

YES :

Go to Step 4.

NO :

Go to Step 3.

STEP 3. Continue to check for static; when static
is detected, check for the conditions listed
above.

Q: Is there noise in the state described in Step 2?

YES :

Noise prevention on the radio side is

difficult. If the problem is particularly worse
than other radios, consult a service center.

NO :

Go to Step 4.

RADIO AND CD PLAYER

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CHASSIS ELECTRICAL

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STEP 4. Compare it with the other radios.

Q: Is the noise level worse than other radios?

YES :

Consult a service center.

NO :

If the noise level is roughly the same as
other radios, there is no action to be taken.

INSPECTION PROCEDURE 12: Noise sometimes appears on FM during traveling.

DIAGNOSIS

STEP 1. Check the state of the antenna.
Check that there is no damage or crack in the roof
antenna.

Q: Is the mast antenna assembled?

YES :

Go to Step 2.

NO :

Repair or replace the roof antenna.

STEP 2. The check after adjusting the radio.

Q: Readjust the radio. Is the noise eliminated?

YES :

The procedure is complete.

NO :

Go to Step 3.

STEP 3. Check with several broadcasting
stations.
NOTE: Multipath noise and fading noise: Because of
the frequency of FM waves in extremely high, it is
highly susceptible to effects from geological forma-
tions and buildings. These effects disrupt the broad-
cast signal and obstruct reception in several ways.

.

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).

.

Fading noise

•

This is a buzzing noise that occurs when the
broadcast beam is disrupted by obstructing
objects and the signal strength fluctuates intri-
cately within a narrow range.

Q: Is the abnormality in reception generated only

within a certain range?
YES :

The effect of an electrical field condition

(multipath noise, fading noise) could be the
cause. The procedure is complete.

NO :

Go to Step 4.

STEP 4. Check that noise appears when the radio
switch is turned on while the vehicle is stopped.
NOTE: Static electricity noise: Body static electric
from the shock absorber rubber bushings used to
prevent vibration, tires, etc. occurs because of sepa-
ration from the ground, causing a buzzing noise.
There is no measures to discharge the static electric-
ity of the vehicle body. Check that there is no noise.

Q: Does noise appear when the radio switch is turned

on while the vehicle is stopped and the radio is
tapped while tuned away from a station?
YES :

Go to Step 5.

NO :

It may be static electricity noise. The
procedure is complete.

STEP 5. Check that the radio is correctly
grounded.
The radio is connected to the ground with an assem-
bling screw.

Q: Is the radio correctly grounded?

YES :

Go to Step 6.

NO :

Tighten the screw securely.

STEP 6. Check by replacing the radio and CD
player.

Q: Are operations normal when using another radio

and CD player?
YES :

Either repair or replace the radio and CD

player.

NO :

Repair or replace the roof antenna.

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Inspection Procedure 13: Noise is detected with engine running.

DIAGNOSIS

.

CAUTION

Never connect a noise filter to the high tension
cable (spark plug wire). Spark plug wires incor-
porate resistors which have the effect of sup-
pressing noise. If a spark plug wire is found to be
causing noise, it must be replaced.

CAUTION

Confirm that the noise is not from an external
source.

CAUTION

Noise prevention should be performed by sup-
pressing strong sources of noise first.

Description of noise

Condition

Cause

Solution

AM, FM: ignition noise
(popping, snapping,
cracking, buzzing)

• Increasing the engine

speed causes the
generator whine to
speed up and the
volume to decrease.

• Disappears when the

ignition switch turned
to "ACC", and engine
is off.

• Electrical interference

from the spark plugs.

• Engine noise.

• Check or replace the

ground cable.

• Check or replace

spark plug wires.

Other electrical
components

-

Noise may intensify due
to aging electrical
components.

Repair or replace the
electrical components.

Static electricity (cracking,
crinkling)

Noise disappears when
the vehicle is completely
stopped.

Noise occurs when parts
or wiring move and
contact vehicle body.

Return parts or wiring to
their proper position.

Static electricity (cracking,
crinkling)

Various noises are
produced depending on
the body part of the
vehicle.

This may be due to the
recent removal of the
front hood, bumpers,
exhaust pipe and muffler,
suspension, etc.

• Properly ground parts.

• Properly ground all

body parts.

AC709398

Generator

AC

Ground cable

<3.0L Engine>

AC709974

Power steering
oil pump

Ground cable

<2.4L Engine>

AB

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INSPECTION PROCEDURE 14: Noise appears during vibration or shocks.

DIAGNOSIS

STEP 1. Check the fit of the antenna.
Q: Is the antenna base fitted securely?

YES : Go to Step 2.
NO : Install the antenna, and tighten the mounting nut

(Refer to

P.54A-696

). Check that there is no noise.

STEP 2. Check the fit of antenna feeder cable.
Q: Is the antenna feeder cable fitted securely?

YES : Go to Step 3.
NO : Ensure that the antenna base and the radio and CD

player are fitted securely. Check that there is no
noise.

STEP 3. Check that noise appears when the radio switch is
turned on while the vehicle is stopped and the radio is
tapped while tuned away from a station.
NOTE: Body static electricity from the shock absorber rubber
bushings used to prevent vibration, tires, etc. occurs because
of separation from the ground, causing a buzzing noise. Since
no measures can be taken to discharge the static electricity of
the vehicle body. Check that there is no noise.
Q: Does noise appear when the radio switch is turned on

while the vehicle is stopped and the radio is tapped
while tuned away from a station?
YES : Go to Step 4.
NO : It may be static electricity noise.

STEP 4. Verify that the radio is correctly grounded.
The radio is connected to the ground with an assembling
screw.
Q: Is the radio correctly grounded?

YES : Go to Step 5.
NO : Tighten the screw securely. Check that there is no

noise.

STEP 5. Check by replacing radio and CD player.
Q: Do the other radio and CD player work normally?

YES : Either repair or replace the original radio and CD

player. Check that there is no noise.

NO : Either repair or replace the antenna assembly. Check

that there is no noise.