Mitsubishi Lancer (4A9 engine). Manual - part 165

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-322

Inspection Procedure 3: No sound is heard from one of the speakers. <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.

Speaker System Circuit

AUDIO AMPLIFIER

TWEETER 
(LH)

TWEETER 
(RH)

FRONT DOOR 
SPEAKER (LH)

FRONT DOOR 
SPEAKER (RH)

REAR DOOR 
SPEAKER 
(LH)

REAR DOOR 
SPEAKER 
(RH)

SUB WOOFER

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

CHASSIS ELECTRICAL

54A-323

AUDIO AMPLIFIER

RADIO AND CD PLAYER

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

AC701094

Connector: C-103 <LHD>

AJ

AC701122 DC

Connectors: C-103 <RHD>

AC612722

AH

Connectors: D-26, D-27

D-26

D-27

AC612730

Connectors: E-02, E-12

AD

E-02 (B)

E-12

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-324

COMMENTS ON TROUBLE SYMPTOM
If the sound is not heard from one of the speakers, 
the speaker, radio and CD player, audio amplifier, 
communication line from the radio and CD player to 
the audio amplifier, or communication line from the 
audio amplifier to the speaker may have a problem. 
Also, the option coding information may be inconsist-
ent.

PROBABLE CAUSES

• Malfunction of speaker

• Malfunctions of radio and CD player

• Malfunction of audio amplifier

• 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 "Number of speaker" is set to 

"Premium."

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 "Number of 
speaker," and check the trouble symptom.

STEP 2. Checking with audio speaker check
Perform the audio speaker check, and check which 
speaker does not output the sound. Refer to .
NOTE: In the following procedure, check the speaker 
or tweeter that is abnormal.

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 : 

Go to Step 3.

STEP 3. Connector check: E-12 <front-LH>, E-10 
<front-RH>, E-22 <rear-LH> or E-21 <rear-RH> 
door speaker connector, E-02 <LH>, E-04 <RH> 
tweeter connector, F-25 subwoofer connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

AC612731

Connectors: E-04, E-10

AD

E-04 (B)

E-10

AC612733

Connector: E-21

AB

AC612732

Connector: E-22

AB

AC801775 BJ

F-25 (B)

Connector: F-25 <LANCER SPORTBACK>

AC701264 AR

Connector: F-25 <LANCER>

F-25 (B)

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-325

STEP 4. Check the speaker, tweeter or 
subwoofer.
(1) Remove the speaker, tweeter or subwoofer. 

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. <speaker 
or tweeter>

(3) Check that the subwoofer outputs the noise when 

the voltage of 5 V is applied to the subwoofer 
connector terminal. <subwoofer>

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the speaker, tweeter or subwoofer.

STEP 5. Connector check: D-26 <front door 
speaker or sub woofer>, D-27 <tweeter or rear 
door speaker> audio amplifier connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.