Mitsubishi Outlander GS45X. Manual - part 103

RADIO AND CD PLAYER

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CHASSIS ELECTRICAL

54A-409

COMMENTS ON TROUBLE SYMPTOM

If the external input sound is not output, the radio and 
CD player, audio communication line of radio and CD 
player, or audio adapter may have a problem.

.

PROBABLE CAUSES

• The audio adapter may be defective.

• The radio and CD player may be defective.

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Operation check of the radio and CD player
Check if the radio and CD player operates normally and out-
puts sound.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Troubleshoot the radio and CD player (Refer to 

P.54A-363

).

STEP 2. Check the external sound input mode.
Check if the external sound input mode of the radio and CD 
player is set.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Set the external sound input mode.

STEP 3. Check the audio adapter.
Check if the audio adapter is normal.(Refer to 

P.54A-425

)

Q: Is the check result normal?

YES : Go to step 4.
NO :  Replace the Audio adapter.

STEP 4. Check audio adapter connector C-117 and radio 
and CD player connector C-14 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are audio adapter connector C-117 and radio and CD 

player connector C-14 in good condition?
YES : Go to step 5.
NO :  Repair or replace the damaged component(s) (Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

).

RADIO AND CD PLAYER

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STEP 5. Check the wiring harness between audio adapter 
connector C-117 (terminal 4, 6) and radio and CD player 
connector C-14 (terminal 13, 4).

• Check the communication lines for open circuit and short 

circuit.

NOTE: Also check intermediate connectors D-123 for loose, 
corroded, or damaged terminals, or terminals pushed back in 
the connector. If intermediate connector D-123 is damaged, 
repair or replace the connector as described in GROUP 00E, 
Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between audio adapter connector 

C-117 (terminal 4, 6) and radio and CD player connector 
C-14 (terminal 13, 4) in good condition?
YES : Replace the audio adapter, and go to Step 6.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 6. Retest the system.
Check that the external input is normal.
Q: Is the check result normal?

YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00 

− How to use 

Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the radio and CD player.

INSPECTION PROCEDURE 7: Noise appears at certain places when traveling (AM).

DIAGNOSIS

STEP 1. Check the noise occur when entering or 
near a particular structure (building, tunnel, 
mountain, etc.)

Q: Does the noise occur when entering or near a 

particular structure (building, tunnel, mountain, 
etc.)?
YES : 

Go to Step 3.

NO : 

Go to Step 2.

STEP 2. After taking the following measures to 
prevent the noise, check that no noise appears.
(1) Change to a different station with a stronger wave 

to boost resistance to interference.

(2) Suppress high tones to reduce noise.

Q: Do the following measures eliminate the noise?

YES : 

The procedure is complete.

NO : 

Go to Step 4.

STEP 3. Ask the owner about the state of the 
noise.
Find out the following information from the owner.

• Place where the noise occurs.

• Locality conditions (valley, mountain, etc.)

• Name and frequency of stations affected by noise

Q: Which is the noise, vehicle noise or external 

noise?
Vehicle noise : 

It may not be possible to prevent 

noise if the signal is weak. The procedure is 
complete.

External noise : 

In almost all cases, prevention on 

the receiver side is impossible. Weak 
signals especially are susceptible to 
interference. Go to Step 4.

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STEP 4. Check that there is no noise.

Q: Does noise still exist? 

YES : 

If there is more noise than on radios in other 

vehicles, find out the noise condition and 
the name and frequency of the receiving 
stations from the owner, and consult with 
the radio manufacturer's service center.

NO : 

Normal.

INSPECTION PROCEDURE 8: Noise is present while moving (FM).

DIAGNOSIS

.

NOTE: FM waves have the same properties as light, 
and can be deflected and blocked. FM signal recep-
tion is severely degraded in the shadow of obstruc-
tions such as buildings or mountains. An FM receiver 
will then only receive a reflected signal.
1. The signal becomes weak as the distance from 

the station's transmission antenna increases. The 
signal strength received depends on the signal 
strength of the transmitting station and intervening 
obstructions such as buildings and hills. Generally 
speaking, the area of good reception is 
approximately 20 

− 25 km for stereo reception, 

and 30 

− 40 km for monaural reception.

2. The signal will becomes weak when an area of 

shadow from the transmitting antenna (places 
where there are obstructions such as mountains 
or buildings between the station transmitter and 
the vehicle), and noise will appear. <This is called 
first fading, and gives a steady buzzing noise.>

3. If a direct signal hits the antenna at the same time 

as a signal reflected by obstructions such as 
mountains or buildings, interference of the two 
signals will generate noise. When moving, noise 
will appear each time the vehicle's antenna 
passes through this kind of obstructed area. The 
strength and interval of the noise varies according 
to the signal strength and the conditions of 
deflection. <This is called multipath noise, and is a 
repetitive buzzing.>

4. Since FM stereo transmission and reception has a 

weaker field than monaural, it is often 
accompanied by a hissing noise.

.

After taking measures to prevent the noise, 
check that no noise occurs.

• Change to a different station with a stronger wave 

to boost resistance to interference.

• Suppress high tones to reduce noise.

.

If there is noise, the following causes can be 
considered.

• If due to vehicle noise: It may not be possible to 

prevent noise if the signal is weak.

• If due to external noise: In almost all cases, pre-

vention on the receiver side is not possible. Weak 
signals especially are susceptible to interference.

ACX01869

10kW
OUTPUT FM
BROAD CAST

FOR STEREO:
20 - 25 km
(12 - 16 miles)

FOR  MONAURAL:
30 - 40 km (19 - 25 miles)

FOR  HOME STEREO:
80 - 90 km (50 - 56 miles)

MALTIPATH INTERFERENCE

FIRST FADING
INTERFERENCE

AC

RADIO AND CD PLAYER

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If there is more noise than on radios in other vehi-
cles, find out the noise condition and the name and 
frequency of the receiving stations from the owner, 
and consult with the radio manufacturer's service 
center.

INSPECTION PROCEDURE 9: Sound mixed with noise, only at night (AM).

The following factors can be considered as possible 
causes of noise appearing at night.
1. Factors due to signal conditions: Due to the fact 

that long-distance signals are more easily 
received at night, even stations that are received 
without problem during the day may experience 
interference in a general worsening of reception 
conditions. The weaker a station is the more 
susceptible it is to interference, and a change to 
different station or the appearance of a beating 
sound* may occur.

NOTE: Beat sound*: Two signals close in fre-
quency interfere with each other, creating a repeti-
tious high-pitched sound. This sound is generated 
not only by sound signals but electrical waves as 
well.

2. Factors due to vehicles noise: Generator noise 

may be a cause.

DIAGNOSIS

STEP 1. Check that the noise still obvious even 
when the lights are off.

Q: Is the noise still obvious even when the lights are 

off?
YES : 

Go to Step 2.

NO : 

Go to Step 3.

STEP 2. Check that the noise fades away by the 
following action.
Tune to a station with a stronger wave.

Q: Does noise still exist? 

YES : 

Consult the radio manufacturer's service 

center.

NO : 

The procedure is complete.

STEP 3. Check that the noise fades away when 
the vehicle harness is moved away from the 
radio (if the harness is not in the proper 
position).

Q: Does the noise fade away when the vehicle 

harness is moved any from the radio (If the 
harness is not in the proper position)?
YES : 

Repair the wiring harness.

NO : 

If there is more noise than other radios, 
consult the radio manufacturer's service 
center.

INSPECTION PROCEDURE 10: Broadcasts can be heard, but both AM and FM have a lot of noise.

DIAGNOSIS

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

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair or replace the roof antenna.

STEP 2. Check that the noise occur when the 
engine is stopped or the engine is running.

Q: Does noise occur when the engine is stopped or 

the engine is running?
When the engine is stopped : 

Go to Step 3.

When the engine is running : 

Check the vehicle's 

noise suppressor (Refer to Inspection 
Procedure 12 

P.54A-415

).