Mitsubishi Outlander XL. Manual - part 1092

STEP 27. Check tweeter (LH) connector E-14 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is tweeter (LH) connector E-14 in good condition?

YES:

 Go to Step 28.

NO:

 Repair or replace the damaged component(s). Refer to

GROUP 00E, Harness Connector Inspection P.00E-2.

STEP 28. Check the tweeter (LH).

(1)

Remove the tweeter (LH). Refer to P.54B-170.

ZC3064660000

5 volts

(2)

Check that the tweeter (LH) outputs the noise when five volts
are applied to the tweeter (LH) connector terminal.

Q:Does the tweeter (LH) output the noise?

YES:

 Go to Step 29.

NO:

 Replace the tweeter (LH).

STEP 29. Check audio amplifier connector D-127 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is audio amplifier connector D-127 in good condition?

YES:

 Go to Step 30.

NO:

 Repair or replace the damaged component(s). Refer to

GROUP 00E, Harness Connector Inspection P.00E-2.

STEP 30. Check the wiring harness between audio amplifier
connector D-127 (terminal 6, 14) and tweeter (LH) connector
E-14 (terminal 2, 1).

NOTE: 

Also check intermediate connectors C-22 and C-113 for

loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-22 or
C-113 is damaged, repair or replace the connector as
described in GROUP 00E, Harness Connector Inspection P.
00E-2.

｠

Check the communication lines for open circuit.

Q:Is the wiring harness between audio amplifier connector

D-127  (terminal  6,  14)  and  tweeter  (LH)  connector  E-14

(terminal 2, 1) in good condition?

YES:

 Check the trouble symptom, and go to Step 35.

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 31. Check subwoofer connector D-15 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is subwoofer connector D-15 in good condition?

AUDIO AND NAVIGATION SYSTEM

54B-49

DIAGNOSIS

YES:

 Go to Step 32.

NO:

 Repair or replace the damaged component(s). Refer to

GROUP 00E, Harness Connector Inspection P.00E-2.

STEP 32. Check the Subwoofer.

(1)

Remove the subwoofer. Refer to P.54B-170.

ZC3061380000

5 volts

(2)

Check that the subwoofer outputs the noise when five volts
are applied to the subwoofer connector terminal.

Q:Does the subwoofer output the noise?

YES:

 Go to Step 33.

NO:

 Replace the subwoofer.

STEP 33. Check audio amplifier connector D-126 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.

Q:Is audio amplifier connector D-126 in good condition?

YES:

 Go to Step 34.

NO:

 Repair or replace the damaged component(s). Refer to

GROUP 00E, Harness Connector Inspection P.00E-2.

STEP 34. Check the wiring harness between audio amplifier
connector D-126 (terminal 21, 22, 29, 30) and subwoofer
connector D-15 (terminal 4, 2, 3, 1).

｠

Check the communication lines for open circuit.

Q:Is the wiring harness between audio amplifier connector

D-126 (terminal 21, 22, 29, 30) and subwoofer connector

D-15 (terminal 4, 2, 3, 1) in good condition?

YES:

 Check the trouble symptom, and go to Step 35.

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 35. Replace the audio amplifier temporarily, and
check the trouble symptom.
Replace  the  audio  amplifier  temporarily,  and  check  that  the
sound is output from the speaker.

Q:Is the check result normal?

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AUDIO AND NAVIGATION SYSTEM

DIAGNOSIS

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 or CD changer.

Inspection Procedure 4: Noise is present while moving (AM).

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DIAGNOSIS

STEP 1. Ask the driver about the noise.

(1)

Find out the following information from the owner.

(2)

Place where the noise occurs.

(3)

Locality conditions (valley, mountain, etc.)

(4)

Name and frequency of stations affected by noise

Q:Is the detected noise a vehicle noise?

YES(Vehicle noise is detected.):

 It may not be

possible to prevent noise if the signal is weak.
Go to step 2.

NO(Eexternal noiseis detected.):

 In almost all

cases, prevention on the receiver side is next
to impossible when the signal is weak. Go to
Step 4.

STEP 2. Ask the driver about the location where
the noise occurs

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 4.

STEP 3. Check if the noise can be eliminated by
adjusting the radio.

(1)

Adjust the radio as follows.

(2)

Change to a different station with a stronger signal.
This will boost the systems resistance to outside
interference.

(3)

Suppress high tones to reduce noise.

Q:Has the noise been eliminated?

YES:

 The noise has now been eliminated. Inform

the customer that it is normal to hear noise
while receiving a weak station.

NO:

 Go to Step 4.

STEP 4. Check for the noise.

Q:Does noise still exist?

YES:

 If there is still more noise than on other

similar radio’s find out the type of noise. Ask
the owner for the name and frequency of the
affected stations, and consult with the radio
manufacturer service center.

NO:

 System is operating normally.

Inspection Procedure 5: Noise is present while moving (FM).

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ZC602313

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 inter

ference

First fading

interference

0000

DIAGNOSIS

NOTE: 

FM waves have the same properties as light,

and can be deflected and blocked. FM signal

reception is severely degraded in the shadow of
obstructions such as buildings or mountains. An FM

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54B-51

DIAGNOSIS

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 (12 - 16 miles) for stereo
reception,  and  30  -  40  km  (19  -  25  miles)  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.

5.

Change to a different station with a stronger wave
to boost resistance to interference.

6.

Suppress high tones to reduce noise.

7.

Does vehicle have an antenna which extend? If not
eliminate this step.

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

8.

If  due  to  vehicle  noise:  It  may  not  be  possible  to
prevent noise if the signal is weak.

9.

If  due  to  external  noise:  In  almost  all  cases,
prevention  on  the  receiver  side  is  not  possible.
Weak  signals  especially  are  susceptible  to
interference.

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.

Inspection Procedure 6: Sound mixed with noise, only at night (AM).

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The following can be considered as possible causes
of noise appearing only at night.

1.

It  is  significantly  easier  to  receive  long-distance
signals at night. This means that even stations that
are received without a problem during the day may
experience problems at night. Remember that the
weaker station is more susceptible to interference.
The appearance of a beat sound may occur in the
evening. A beat sound is created when two signals
close  in  frequency  interfere  with  each  other.  A
common  sign  of  this  type  of  interference  is  a
repetitious high-pitched sound that may over power
the desired radio station. This sound is generated
not only by sound signals but electrical waves as
well.

2.

The  changing  system  may  also  be  a  source  of
noise.  When  diagnosing  radio  noise,  do  not  over
look the possibility of a problem with the vehicles
generator.

DIAGNOSIS

STEP 1. Check the vehicles lighting system.

Q:Does  the  noise  disappear  when  the  vehicles

headlights are turned "OFF"?

YES:

 Go to Step 2.

NO:

 Go to Step 3.

STEP 2. Check that the following actions
disappear the noise.
Tune to a station with a stronger signal.

Q:Is  there  more  noise  than  on  radio  in  other

vehicles?

YES:

 Consult the radio manufacturer's service

center.

NO:

 Check that there is no noise.

54B-52

AUDIO AND NAVIGATION SYSTEM

DIAGNOSIS