Mitsubishi Colt Ralliart. Manual — part 491

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-109

INSPECTION PROCEDURE 14: Distortion on AM or on Both AM and FM.

DIAGNOSIS PROCEDURE

Step 1. Check the degree in which distortion is
generated.

Q: How much distortion is generated?

Occasional distortion :

Go to Step 2.

Constant distortion :

Go to Step 3.

Step 2. Check by the transmission antenna.

Q: Is there distortion by the transmission antenna?

YES :

The input from the antenna is too big.

NO :

Go to Step 3.

Step 3. Check how the speakers are setup.

Q: Are any cords coming in contact with the paper

cones of the speakers?
YES :

Move the cords so that they do not come in

contact with the paper cones of the speaker.
Check that a distortion is resolved.

NO :

Go to Step 4.

Step 4. Check the speakers.

1. Remove the speakers.
2. Check to see if there is any ripping of the paper

cones or any foreign obstacles in the paper cone.

Q: Are the speakers normal?

YES :

Go to Step 5.

NO :

Repair or replace the speakers. Check that
a distortion is resolved.

Step 5. Check how the speakers are setup.

Q: Check to see if the speakers are setup in a

deformed manner.
YES :

Correct the way the speakers are setup so

they are securely setup. Check that a
distortion is resolved.

NO :

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

INSPECTION PROCEDURE 15: Distortion on FM Only.

DIAGNOSIS PROCEDURE

Step 1. Check with another broadcasting station.

Q: Is there distortion when turning to another

broadcasting 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 noise.

NO :

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

Main

Index

Group

TOC

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-110

INSPECTION PROCEDURE 16: Using the Auto Select Function, Too Few Automatic Stations are
Selected.

DIAGNOSIS PROCEDURE

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 (underneath 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 the 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.

Main

Index

Group

TOC

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-111

Inspection Procedure 17: Preset Station are Erased.

Memory Backup Power Circuit

1

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

FUSIBLE
LINK

RADIO AND CD PLAYER

COMMENTS ON TROUBLE SYMPTOM

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

POSSIBLE CAUSES

• Damaged wiring harness or connector.

• Malfunction of the radio and CD player.

Main

Index

Group

TOC

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-112

DIAGNOSIS PROCEDURE

Step 1. Voltage measurement at radio and CD
player connector B-11.

AC401055

AN

Connector: B-11

Harness side

(1) Disconnect radio and CD player connector B-11.

AC400965

Connector B-11
(Harness side)

AM

(2) Measure the voltage between terminal number 11

and earth.

OK: Battery positive voltage

Q: Does the measured voltage correspond with this

range?
When YES <radio and CD player does not execute
memory save then.> : .

Either repair or replace the

radio and CD player. Check that a memory
is retained.

NO : .

Go to Step 2.

Step 2. Connector check: Radio and CD player
connector B-11.

AC401055

AN

Connector: B-11

Harness side

Q: Is radio and CD player connector B-11 in good

condition?
YES :

Go to Step 3.

NO :

Repair or replace the damage
component(s). Check that a memory is
retained.

Main

Index

Group

TOC