Mitsubishi Outlander XL. Manual - part 1094

is highly susceptible to effects from geological
formations and buildings. These effects disrupt
the broadcast signal and obstruct reception in
several ways.

｠

Multipath noise
This  describes  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).

｠

Fading noise
This  is  a  buzzing  noise  that  occurs  when  the
broadcast signal is disrupted by obstructing objects
and the signal strength fluctuates intricately within
a narrow range.

Q:Is the problem station or location specific?

YES:

 The effect of an electrical field

condition (multipath noise, fading noise) could
be the cause. Check that there is not noise.

NO:

 Go to Step 4.

STEP 4. Check that noise appears when the radio
switch is turned on while the vehicle is stopped.

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. There is no measures 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 5.

NO:

 It may be static electricity noise.

STEP 5. 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 6.

NO:

 Tighten the screw securely. Check that

there is no noise.

STEP 6. Check by replacing radio and CD player
or CD changer.

Q:Do the other radio and CD player or CD changer

work normally?

YES:

 Either repair or replace the original

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

NO:

 Either repair or replace the antenna

assembly. Check that there is no noise.

Inspection Procedure 12: Constant noise.

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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  4  to  11,  obtain
information on the factors listed above. (Refer to P.
54B-18.) Determine whether the problem occurs on
AM or FM, the station names, frequencies, etc. and
contact the radio manufacturer's service center.

AUDIO AND NAVIGATION SYSTEM

54B-57

DIAGNOSIS

Inspection Procedure 13: No reception (AM).

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DIAGNOSIS

STEP 1. Check the state of the antenna.

Q:Is the mast antenna assembled?

YES:

 Go to Step 2.

NO:

 Assemble the mast antenna. The radio should

sound normally.

STEP 2. 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 3.

NO:

 Go to Step 4.

STEP 3. 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 4.

STEP 4. 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 5.

STEP 5. Check the connection of the antenna plug
and radio and CD player or CD changer.

Q:Is the antenna plug thoroughly connected to the

radio and CD player or CD changer?

YES:

 Go to Step 6.

NO:

 Thoroughly connect the antenna plug and the

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

STEP 6. Check by replacing radio and CD player
or CD changer.

Q:Do the other radio and CD player or CD changer

work normally?

YES:

 Either repair or replace the original

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

NO:

 Either repair or replace the antenna

assembly. The radio should sound normally.

Inspection Procedure 14: Poor reception.

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DIAGNOSIS

STEP 1. Check the state of the antenna.

Q:Is the mast antenna assembled?

YES:

 Go to Step 2.

NO:

 Assemble the mast antenna. Check that a

poor reception is resolved.

STEP 2. 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 3.

NO:

 Go to Step 4.

STEP 3. 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 4.

STEP 4. 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 5.

54B-58

AUDIO AND NAVIGATION SYSTEM

DIAGNOSIS

STEP 5. 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 6.

STEP 6. Check the connection of the antenna plug
and radio and CD player or CD changer.

Q:Is the antenna plug thoroughly connected to the

radio and CD player or CD changer?

YES:

 Go to Step 7.

NO:

 Thoroughly connect the antenna plug and the

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

STEP 7. Check by replacing radio and CD player
or CD changer.

Q:Do the other radio and CD player or CD changer

work normally?

YES:

 Either repair or replace the original

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

NO:

 Either repair or replace the antenna

assembly. Check that a poor reception is
resolved.

Inspection Procedure 15: Distortion on AM and/or FM.

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DIAGNOSIS

STEP 1. Check the level of distortion.
Check how often sound is distorted.

Q:Is the sound distortion steady?

YES(Constant distortion):

 Go to Step 3.

NO(Occasional distortion):

 Go to Step 2.

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

AUDIO AND NAVIGATION SYSTEM

54B-59

DIAGNOSIS

INSPECTION PROCEDURE 16: Distortion on FM only.

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DIAGNOSIS

STEP 1. Check that the distortion is present when
the radio is tuned to another station.

Q:Does  the  distortion  persist  when  the  radio  is

tuned to another station?

YES:

 Go to Step 2.

NO:

 The signal from that station is too weak.

STEP 2. Relocate the reception area and check the
radio.

Q:When  relocating  the  reception  area  does  the

distortion increase or decrease?

YES:

 The cause may be multipath or fading

noise. 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.

NO:

 Replace the radio and CD player. Check that

a distortion is resolved.

Inspection Procedure 17: Auto select function inoperative, too few automatic stations
are selected.

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DIAGNOSIS

STEP 1. Check the state of the antenna.

Q:Is the mast antenna assembled?

YES:

 Go to Step 2.

NO:

 Assemble the mast antenna. The auto-select

function should operate normally.

STEP 2. Check the number of radio stations.

Q:Are there sufficient numbers of radio stations

within the area?

YES:

 Go to Step 3.

NO:

 Go to Step 4.

STEP 3. Check the distance from the transmission
antenna.

Q:Is there a transmission antenna within a range

of 2 miles?

YES:

 Go to Step 5.

NO:

 Go to Step 4.

STEP 4. The check if there are not that many radio
stations and when there is no transmission
antenna in the vicinity.
Execute automatic selection and check to see that the
strongest  radio  frequency  is  receivable  within  the
area.

Q:Is  reception  of  the  strongest  radio  frequency

possible within the area?

YES:

 There is no action to be taken.

NO:

 Go to Step 5.

STEP 5. 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 6.

NO:

 Go to Step 7.

STEP 6. Relocate and check.
Automatically receive in a good reception area that is
not exposed to special electric fields.

Q:Is  reception  of  the  strongest  radio  frequency

possible within the area?

54B-60

AUDIO AND NAVIGATION SYSTEM

DIAGNOSIS