Mitsubishi Galant 9G. Manual — part 1580

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STEP 5. Check by replacing radio and CD player or radio,
CD player and CD changer.
Q: Do the other radio and CD player or radio, CD player

and CD changer work normally?
YES : Either repair or replace the original radio and CD

player or radio, CD player and CD changer. Check
that there is no noise.

NO : Either repair or replace the antenna assembly. Check

that there is no noise.

INSPECTIONPROCEDURE 16: Constant Noise.

DIAGNOSIS

.

Use the Symptom Chart to diagnose the possible cause(s) of
the noise. Noise is often created by the following factors:

• Traveling conditions of the vehicle

• Terrain of area traveled through

• Surrounding buildings

• Signal conditions

• Time period

If there are still problems with noise, even after performing
inspection procedures 8 to 15, obtain information on the factors
listed above. Determine whether the problem occurs on AM or
FM, the station names, frequencies, etc. and contact the radio
manufacturer's service center.

INSPECTION PROCEDURE 17: No reception (AM).

DIAGNOSIS

.

STEP 1. Check to see if inspections are taking place is an
area exposed to special electric fields.
Q: Are inspections taking place under special electric field

conditions? (underground garage, inside a building,
etc.)?
YES : Go to Step 2.
NO : Go to Step 3.

STEP 2. Move the vehicle and check the radio.
Move the vehicle to a good reception area that is not exposed
to special electric fields.
Q: Is reception of the strongest radio frequency possible

within the area?
YES : There is no action to be taken.
NO : Go to Step 3.

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STEP 3. Tune the radio, and then check it.
Q: Did the sensitivity improve after tuning?

YES : There is no action to be taken.
NO : Go to Step 4.

STEP 4. Check the connection of the antenna plug and
radio and CD player or radio, CD player and CD changer.
Q: Is the antenna plug thoroughly connected to the radio

and CD player or radio, CD player and CD changer?
YES : Go to Step 5.
NO : Thoroughly connect the antenna plug and the radio

and CD player or radio, CD player and CD changer.
The radio should sound normally.

STEP 5. Check by replacing radio and CD player or radio,
CD player and CD changer.
Q: Do the other radio and CD player or radio, CD player

and CD changer work normally?
YES : Either repair or replace the original radio and CD

player or radio, CD player and CD changer. The radio
should sound normally.

NO : Either repair or replace the antenna assembly. The

radio should sound normally.

INSPECTION PROCEDURE 18: Poor Reception.

DIAGNOSIS

.

STEP 1. Check to see if inspections are taking place is an
area exposed to special electric fields.
Q: Are inspections taking place under special electric field

conditions? (underground garage, inside a building,
etc.)?
YES : Go to Step 2.
NO : Go to Step 3.

STEP 2. Move the vehicle and check the radio.
Move the vehicle to a good reception area that is not exposed
to special electric fields.
Q: Is reception of the strongest radio frequency possible

within the area?
YES : Check that a poor reception is resolved.
NO : Go to Step 3.

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STEP 3. Tune the radio, and then check it.
Q: Did the sensitivity improve after tuning?

YES : Check that a poor reception is resolved.
NO : Go to Step 4.

STEP 4. Check with several broadcasting stations.
NOTE: Two types of noise are addressed in this procedure,
multipath and fading noise. The frequency of FM waves is
extremely high. This makes them susceptible to effects from
geological formations and buildings. These effects disrupt the
broadcast signal and obstruct reception in many ways.

.

•

Multipath noise is the echo that occurs when the broadcast
signal is reflected by a large obstruction and enters the
receiver with a slight time delay relative to the direct signal
(repetitious buzzing).

•

A fading or buzzing noise may occur when the broadcast
beam is disrupted by obstructing objects and the signal
strength fluctuates within a narrow range.

Q: Is the abnormality in reception generated only within a

certain range?
YES : Check that a poor reception is resolved.
NO : Go to Step 5.

STEP 5. Check the connection of the antenna plug and
radio and CD player or radio, CD player and CD changer.
Q: Is the antenna plug thoroughly connected to the radio

and CD player or radio, CD player and CD changer?
YES : Go to Step 6.
NO : Thoroughly connect the antenna plug and the radio

and CD player or radio, CD player and CD changer.
Check that a poor reception is resolved.

STEP 6. Check by replacing radio and CD player or radio,
CD player and CD changer.
Q: Do the other radio and CD player or radio, CD player

and CD changer work normally?
YES : Either repair or replace the original radio and CD

player or radio, CD player and CD changer. Check
that a poor reception is resolved.

NO : Either repair or replace the antenna assembly. Check

that a poor reception is resolved.

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INSPECTION PROCEDURE 19: Distortion on AM and/or FM.

DIAGNOSIS

.

STEP 1. Check the level of distortion.
Q: How much distortion is there?

Occasional distortion : Go to Step 2.
Constant distortion : Go to Step 3.

STEP 2. Check the location of the distortion.
Q: Is there distortion when the vehicle is near the radio

station?
YES : The antenna is receiving too strong a signal.
NO : Go to Step 3.

STEP 3. Check the wires at each speaker.
Q: Are the speaker wires contacting the paper speaker

cone?
YES : Move the speaker wires away from the paper speaker

cone. The speaker should now be free of distortion.

NO : Go to Step 4.

STEP 4. Remove the speakers, and check the paper cone
for foreign material or damage.
Q: Is there foreign material or damage on the paper cone of

the speaker?
YES : Repair or replace the speakers. The speaker should

now be free of distortion.

NO : Go to Step 5.

STEP 5. Check for distortion with the speaker installed.
Q: Does a distortion occur?

YES : Install the speaker securely. The speaker should now

be free of distortion.

NO : Repair or replace the radio and CD player or radio,

CD player and CD changer. The speaker should now
be free of distortion.