Mitsubishi Grandis. Manual — part 378

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-131

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.

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.

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-132

Inspection Procedure 17: Preset Station are Erased.

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.

RELAY
BOX

RADIO AND
CD PLAYER

NOTE

: LHD
: RHD

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

FUSIBLE
LINK

26

Memory Backup Power Circuit

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-133

DIAGNOSIS PROCEDURE

Step 1. Voltage measurement at radio and CD
player connector C-20.

(1) Disconnect radio and CD player connector C-20.

(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 C-20.

Q: Is radio and CD player connector C-20 in good

condition?

YES :

Go to Step 3.

NO :

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

AC310613

BF

Connector: C-20 <LHD>

Harness side

AC310631BB

Connector: C-20 <RHD>

Harness side

AC310507

Connector C-20
(Harness side)

DL

AC310613

BF

Connector: C-20 <LHD>

Harness side

AC310631BB

Connector: C-20 <RHD>

Harness side

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-134

Step 3. Check the wiring harness between radio
and CD player connector C-20 (terminal 11) and
fusible link 26 (battery).

NOTE: Prior to the wiring harness inspection, check
joint connector C-32 <LH drive vehicles>, C-31 <RH
drive vehicles>, and repair if necessary.

Q: Are the wiring harness between radio and CD

player connector C-20 (terminal 11) and fusible link
26 (battery) in good condition?

YES :

Repair or replace the radio and CD player.

Check that a memory is retained.

NO :

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

AC310614

BO

Connectors: C-20, C-32 <LHD>

C-32

C-32

C-20

Harness side

C-20

AC310632 BH

Connectors: C-20, C-31 <RHD>

C-31

C-20

C-31

C-20

Harness side