Mitsubishi Lancer (4A9 engine). Manual — part 160

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-302

TROUBLE SYMPTOM CHART

M1544004902684

NOTE:

.

•

If the radio and CD player is reset or sound jump
occurs at the auto restart by Auto Stop & Go
(AS&G) System, carry out the DC/DC converter
troubleshooting of "Audio equipment reset or
sound jump occurs at auto start".(Refer to
.)<Vehicles with Auto Stop & Go (AS&G) Sys-
tem>

•

For the troubleshooting of the USB box, refer to
.<Vehicles with USB box>

•

For the troubleshooting of the hands free ECU,
refer to .<Vehicles with hands free ECU>

•

For the troubleshooting of the steering wheel
audio remote control switch, refer to .<Vehicles
with steering wheel audio remote control switch>

Trouble symptom

Inspection
Procedure No.

Reference
page

Power of the radio and CD player does
not turn ON when the ignition switch is
in the "ACC" position or "ON" position.

<Vehicles without Auto Stop & Go
(AS&G) System>

1

<Vehicles with Auto Stop & Go
(AS&G) System>

No sound is heard.

<Vehicles without audio amplifier>

2

<Vehicles with audio amplifier>

No sound is heard from one of the
speakers.

<Vehicles without audio amplifier>

3

<Vehicles with audio amplifier>

The radio and CD player does not
operate normally by operating the
audio control unit of the centre panel
unit.

<Vehicles without Auto Stop & Go
(AS&G) System>

4

<Vehicles with Auto Stop & Go
(AS&G) System>

Audio illumination does not work normally.

5

The sound of audio adapter’s input are not played.

6

Troubleshooting for Noise.

7

The sound volume decreases temporarily. The sound disappears at auto start
by Auto Stop & Go (AS&G) System. <Vehicles with audio amplifier>

8

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-303

SYMPTOM PROCEDURES

Inspection Procedure 1: Power of the radio and CD player does not turn ON when the ignition switch
is in the "ACC" position or "ON" position. <Vehicles without Auto Stop & Go (AS&G) System>

CAUTION

Before replacing the radio and CD player, ensure that the power supply circuit, the earth circuit and
the communication circuit are normal.

Radio and CD Player Power Source Circuit

ETACS-
ECU

CAN
COMMUNICATION LINE

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 PU : Purple SI : Silver

FUSIBLE
LINK

38

FUSIBLE
LINK

36

ENGINE
COMPARTMENT

RELAY BOX

NOTE

:
:

PETROL
DIESEL

ETACS-ECU

INPUT SIGNAL

IGNITION
SWITCH (ACC)

RADIO AND CD PLAYER

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-304

OPERATION
When the ignition switch is in the ON or ACC posi-
tion, the radio and CD player power can be turned
ON. With the radio and CD player power ON, when
the ignition switch is turned to the OFF position, the
power for radio and CD player is also turned OFF.

COMMENTS ON TROUBLE SYMPTOM
Provided that the audio diagnosis code is not set, if
the power for radio and CD player cannot be turned
ON, the radio and CD player, or power supply circuit
for radio and CD player may have a problem, or the
option coding information may be inconsistent.

PROBABLE CAUSES

• Malfunctions of radio and CD player

• Malfunction of the ETACS-ECU

• Option coding information inconsistency

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. ETACS-ECU coding data check
(1) Operate the M.U.T.-III to read the ETACS-ECU

option coding information (Refer to GROUP 00

−

Coding Table ).

(2) Check that the "AUDIO" is set to "Present."

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Operate the M.U.T.-III to set the option
coding "AUDIO" to "Present," and check the
trouble symptom.

STEP 2. M.U.T.-III other system diagnosis code
Check if the diagnosis code is set to the ETACS-
ECU.

Q: Is the check result normal?

YES :

Troubleshoot the ETACS-ECU. Refer to

ETACS-ECU

− Troubleshooting .

NO :

Go to Step 3.

STEP 3. M.U.T.-III other system data list
Check the input signal of ACC relay.

• Turn the ignition switch to the ACC position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Refer to ETACS

− Input Signal Procedure 1

"The ignition switch (ACC) signal is not sent
to the ETACS-ECU" .

STEP 4. Connector check: C-103 radio and CD
player connector

Q: Is the check result normal?

AC701094

Connector: C-103 <LHD>

AJ

AC701122 DC

Connectors: C-103 <RHD>

ACA00886

AS

Connectors: C-307, C-311 <LHD>
ETACS-ECU

C-307

C-311

ACA00887

AS

Connectors: C-307, C-311 <RHD>
ETACS-ECU

C-311

C-307

Item No.

Item name

Normal
condition

Item 288

ACC switch

ON

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-305

YES :

Go to Step 5.

NO :

Repair the defective connector.

STEP 5. Voltage measurement at C-103 radio and
CD player connector.
(1) Disconnect the connector, and measure at the

wiring harness-side connector.

(2) Voltage between C-103 radio and CD player

connector terminal No.30 and the body earth

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Go to Step 6.

STEP 6. Check the wiring harness between C-103
radio and CD player connector terminal No.30
and fusible link (36) <Petrol> or (38) <Diesel>

• Check the power supply line (battery power sup-

ply) for open circuit.

NOTE: Prior to the wiring harness inspection, check
intermediate connector C-31, C-128, ETACS-ECU
connector C-307 and C-311, and repair if necessary.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair the wiring harness.

STEP 7. Check that the radio and CD player is
correctly earthed the radio and CD player should
be connected to the earth with an assembly
screw.

Q: Is the radio and CD player correctly grounded?

YES :

Go to Step 8.

NO :

Securely install and earth the radio and CD
player.

STEP 8. Retest the system
Check if the radio and CD player power is turned ON.

Q: Is the check result normal?

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 ).

NO :

Replace the radio and CD player.