Mitsubishi Evolution X. Manual — part 999

RADIO AND CD PLAYER

TSB Revision

CHASSIS ELECTRICAL

54A-357

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.

Q: Is the antenna plug thoroughly connected to the

radio and CD player?
YES :

Go to Step 6.

NO :

Thoroughly connect the antenna plug and
the radio and CD player. The radio should
sound normally.

STEP 6. 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. The radio should sound
normally.

NO :

Either repair or replace the antenna
assembly. The radio should sound normally.

Inspection Procedure 17: Poor reception.

DIAGNOSIS

STEP 1. Check the state of the antenna.

Q: Is the antenna assembled?

YES :

Go to Step 2.

NO :

Assemble the 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.

STEP 5. Check with several broadcasting
stations.
NOTE: Two types of noise are addressed in this pro-
cedure, multipath and fading noise. The frequency of
FM waves is extremely high. This makes them sus-
ceptible 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 obstruc-
tion 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.

Q: Is the antenna plug thoroughly connected to the

radio and CD player?
YES :

Go to Step 7.

NO :

Thoroughly connect the antenna plug and
the radio and CD player. Check that a poor
reception is resolved.

RADIO AND CD PLAYER

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CHASSIS ELECTRICAL

54A-358

STEP 7. 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 a poor reception
is resolved.

NO :

Either repair or replace the antenna
assembly. Check that a poor reception is
resolved.

Inspection Procedure 18: 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.
The speaker should now be free of
distortion.

RADIO AND CD PLAYER

TSB Revision

CHASSIS ELECTRICAL

54A-359

Inspection Procedure 19: Distortion on FM Only.

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 20: Auto select function inoperative, too few automatic stations are selected.

DIAGNOSIS

STEP 1. Check the state of the antenna.

Q: Is the antenna assembled?

YES :

Go to Step 2.

NO :

Assemble the 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?
YES :

There is no action to be taken.

NO :

Go to Step 7.

RADIO AND CD PLAYER

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CHASSIS ELECTRICAL

54A-360

STEP 7. Check the connection of the antenna
feeder cable and radio and CD player.

Q: Is the antenna feeder cable thoroughly connected

to the radio and CD player?
YES :

Repair or replace the radio and CD player.

The auto-select function should operate
normally.

NO :

Thoroughly connect the antenna feeder
cable and the radio and CD player. The
auto-select function should operate
normally.

Inspection Procedure 21: Preset stations are erased.

.

CIRCUIT OPERATION

Power is continuously supplied to the radio and CD
player.

.

TECHNICAL DESCRIPTION (COMMENT)

The cause is probably a faulty radio and CD player
memory backup power supply system circuit.

.

TROUBLESHOOTING HINTS

• Damaged wiring harness or connector

• Malfunction of the radio and CD player

DIAGNOSIS

Refer to Inspection Procedure 1

P.54A-318

.

Inspection Procedure 22: CD can not be inserted.

DIAGNOSIS

STEP 1. Check that a CD has been already
loaded.

Q: Has a CD been already loaded?

YES :

Take out the CD (If the CD can not be

ejected, refer to inspection Procedure 26

P.54A-362

). Check that a CD can be

inserted.

NO :

Go to Step 2.

STEP 2. Check how a CD is inserted.
Ensure that the ignition switch is at 'ACC' or 'ON'.
NOTE: If you try to load a CD when the ignition
switch is at the positions other than 'ACC' or 'ON,' the
CD will not be inserted completely and then rejected.

Q: If you try to load the CD, does the CD stops halfway

and then rejected?
YES :

Refer to inspection Procedure 26

P.54A-362

.

NO :

Go to Step 3.

STEP 3. Check after the CD is loaded.
NOTE: Even though the CD is loaded, 'E01' (vehi-
cles with center display low type) or 'ERROR 01'
(vehicles with center display middle type) sometimes
displayed with the CD rejected because of vibra-
tion/shock or dew on the CD face or optical lens.

Q: Though the CD is inserted completely, is ''ERROR "

displayed and the CD ejected?
YES :

Go to Step 4.

NO :

There is no action to be taken.

STEP 4. Check the CD.
Check the CD for the conditions below:

• Is the CD loaded with its label facing down?

• Is the recorded face dirty or scratched?

• Is there dew on the recorded face?

Q: Is the CD in good condition?

YES :

Go to Step 5.

NO :

The original CD is defective. Check that a
CD can be inserted.