Mitsubishi Lancer (4A9 engine). Manual - part 162

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-310

Inspection Procedure 2: No sound is heard. <Vehicles without audio amplifier>

CAUTION

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

Speaker System Circuit

TWEETER (RH)

REAR DOOR
SPEAKER (LH)

REAR DOOR
SPEAKER (RH)

FRONT DOOR
SPEAKER (RH)

FRONT DOOR
SPEAKER (LH)

TWEETER (LH)

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

RADIO AND CD PLAYER

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-311

COMMENTS ON TROUBLE SYMPTOM
If the audio sound is not output, the radio and CD
player may have a problem. In addition, if any of the
speakers is short-circuited, the protection circuit
inside the radio and CD player disables all the
speakers to sound. Therefore, if all the speakers do
not output sound, the speaker circuit may be shorted
or the speaker may be defective. Also, the option
coding information may be inconsistent.

PROBABLE CAUSES

• Malfunctions of radio and CD player

• Malfunction of speaker or tweeter

• 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 List ).

(2) Check that the result matches with the number of

speakers ("6 speakers" or "4 speakers") specified
by "Number of speaker."

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Operate the M.U.T.-III to set the option
coding "Number of speaker" to "6 speakers"
or "4 speakers", and check the trouble
symptom.

AC701094

Connector: C-103 <LHD>

AC701122 DC

Connectors: C-103 <RHD>

AC612730

Connectors: E-02, E-12

E-02 (B)

E-12

AC612731

Connectors: E-04, E-10

E-04 (B)

E-10

AC612733

Connector: E-21

AC612732

Connector: E-22

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-312

STEP 2. Check the following connectors.
Check the following connectors:

• E-12 front door speaker (LH) connector

• E-10 front door speaker (RH) connector

• E-22 rear door speaker (LH) connector

• E-21 rear door speaker (RH) connector

• E-02 tweeter (LH) connector <vehicles with 6-

speaker>

• E-04 tweeter (RH) connector <vehicles with 6-

speaker>

Q: Are all the connectors in good condition?

YES :

Go to Step 3.

NO :

Repair the defective connector.

STEP 3. Check the speaker or tweeter.
(1) Remove the speaker or tweeter. Refer to .
(2) Check that the speaker or tweeter outputs the

noise when the voltage of 5 V is applied to the
speaker or tweeter connector terminal.

Q: Do the speaker or tweeter output the noise?

YES :

Go to Step 4.

NO :

Replace the speaker or tweeter.

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

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the defective connector.

STEP 5. Check the wiring harness between the
speaker or tweeter connector terminal and the
radio and CD player connector terminal.
Check the communication lines for short circuit.

• <Front door speaker (LH), tweeter (LH)> Check

the wiring harness between E-12 front door
speaker (LH) connector terminal No.1, 2 or E-02
tweeter (LH) connector terminal No.2, 1 and C-
103 radio and CD player connector terminal
No.28, 38.

NOTE: Prior to the wiring harness inspection, check

intermediate connector C-126, and repair if nec-
essary.

• <Front door speaker (RH), tweeter (RH)> Check

the wiring harness between E-10 front door
speaker (RH) connector terminal No.1, 2 or E-04
tweeter (RH) connector terminal No.2, 1 and C-
103 radio and CD player connector terminal
No.26, 36.

NOTE: Prior to the wiring harness inspection, check

intermediate connector C-112, and repair if nec-
essary.

• <Rear door speaker (LH)> Check the wiring har-

ness between E-22 rear door speaker (LH) con-
nector terminal No.1, 2 and C-103 radio and CD
player connector terminal No.27, 37.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-28 and D-21, and
repair if necessary.

• <Rear door speaker (RH)> Check the wiring har-

ness between E-21 rear door speaker (RH) con-
nector terminal No.1, 2 and C-103 radio and CD
player connector terminal No.25, 35.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-16 and D-01, and
repair if necessary.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the wiring harness.

STEP 6. Retest the system
Check if the sound is output from all the speakers.

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.

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-313

Inspection Procedure 2: No sound is heard. <Vehicles with audio amplifier>

CAUTION

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

Audio System Circuit

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

AUDIO AMPLIFIER

RADIO AND CD PLAYER

ENGINE
COMPARTMENT

RELAY BOX

NOTE

:
:

PETROL
DIESEL

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