Mitsubishi Montero (2004+). Manual — part 553

RADIO WITH TAPE PLAYER AND CD PLAYER

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CHASSIS ELECTRICAL

54A-181

INSPECTION PROCEDURE 16: 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.

INSPECTION PROCEDURE 17: 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.

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 :

Repair or replace the radio and CD player.
Check that a distortion is resolved.

RADIO WITH TAPE PLAYER AND CD PLAYER

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CHASSIS ELECTRICAL

54A-182

INSPECTION PROCEDURE 18: Auto Select Function Inoperative, too Few Automatic Stations are
Selected.

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?
YES :

There is no action to be taken.

NO :

Go to Step 7.

STEP 7. 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 :

Repair or replace the radio and CD player.

The auto-select function should operate
normally.

NO :

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

RADIO WITH TAPE PLAYER AND CD PLAYER

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CHASSIS ELECTRICAL

54A-183

INSPECTION PROCEDURE 19: 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

Required Special Tool:

• MB991223: Harness set

FUSIBLE
LINK

1

RADIO AND CD PLAYER

RELAY
BOX

Memory Backup Power Supply Circuit

AC204170

CONNECTORS : D-06, D-28

DJ

D-06

D-28

RADIO WITH TAPE PLAYER AND CD PLAYER

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CHASSIS ELECTRICAL

54A-184

STEP 1. Measure at radio and CD player connector D-06 in
order to check the power supply circuit to the radio and
CD player (through the battery).

(1) Disconnect radio and CD player connector D-06, and

measure at the wiring harness side.

(2) Measure the voltage between terminal number 11 and

ground by backprobing.

• The voltage should equal approximately 12 volts (bat-

tery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Either repair or replace the radio and CD player.

Check that a memory is retained.

NO : Go to Step 2.

STEP 2. Check radio and CD player connector D-06 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.

Q: Is radio and CD player connector D-06 in good

condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Check that a memory is retained.

AC204170

CONNECTOR : D-06

CS

HARNESS SIDE

1
7

2
8

10

11

5

13

6

14

12

4

9

3

AC204738DS

HARNESS SIDE: D-06

6

14

4 5

13

11

3

9 10

2
8

1
7

12

AC204170

CONNECTOR : D-06

CS

HARNESS SIDE

1
7

2
8

10

11

5

13

6

14

12

4

9

3