Mitsubishi Lancer (4A9 engine). Manual - part 164

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-318

STEP 11. Check the wiring harness between the 
speaker, tweeter or subwoofer connector 
terminal and the audio amplifier connector 
terminal.
Check the communication lines for short circuit.

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

ness between E-12 front door speaker (LH) con-
nector terminal No.1, 2 and D-26 audio amplifier 
connector terminal No.28, 38.

NOTE: Prior to the wiring harness inspection, check 

intermediate connectors C-17 and C-126, and 
repair if necessary.

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

ness between E-10 front door speaker (RH) con-
nector terminal No.1, 2 and D-26 audio amplifier 
connector terminal No.27, 37.

NOTE: Prior to the wiring harness inspection, check 

intermediate connectors C-17 and C-112, and 
repair if necessary.

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

ness between E-22 rear door speaker (LH) con-
nector terminal No.1, 2 and D-27 audio amplifier 
connector terminal No.1, 7.

NOTE: Prior to the wiring harness inspection, check 

intermediate connector D-21, and repair if neces-
sary.

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

ness between E-21 rear door speaker (RH) con-
nector terminal No.1, 2 and D-27 audio amplifier 
connector terminal No.2, 8.

NOTE: Prior to the wiring harness inspection, check 

intermediate connector D-01, and repair if neces-
sary.

• <Tweeter (LH)> Check the wiring harness 

between E-02 tweeter (LH) connector terminal 
No.1, 2 and D-27 audio amplifier connector termi-
nal No.14, 6.

NOTE: Prior to the wiring harness inspection, check 

intermediate connectors C-17 and C-126, and 
repair if necessary.

• <Tweeter (RH)> Check the wiring harness 

between E-04 tweeter (RH) connector terminal 
No.1, 2 and D-27 audio amplifier connector termi-
nal No.5, 13.

NOTE: Prior to the wiring harness inspection, check 

intermediate connectors C-17 and C-112, and 
repair if necessary.

• <Sub woofer> Check the wiring harness between 

E-25 subwoofer connector terminal No.1, 2, 3, 4 
and D-26 audio amplifier connector terminal 
No.30, 22, 29, 21.

NOTE: Prior to the wiring harness inspection, check 

intermediate connector D-17, and repair if neces-
sary.

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Repair the wiring harness.

STEP 12. Check the wiring harness between C-
103 radio and CD player connector terminal 
No.26, 28, 36, 38 and D-27 audio amplifier 
connector No.10, 4, 11, 12.

• Check the communication lines for short circuit.

NOTE: Prior to the wiring harness inspection, check 
intermediate connector C-17, and repair if necessary.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the wiring harness.

STEP 13. 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 : 

Go to Step 14.

STEP 14. Replace the audio amplifier temporarily, 
and check the trouble symptom.
Replace the audio amplifier temporarily, and check 
that the sound is output from all the speakers.

Q: Is the check result normal?

YES : 

Replace the audio amplifier.

NO : 

Replace the radio and CD player.

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-319

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

<VEHICLES WITH 6 SPEAKER>

<VEHICLES WITH 6 SPEAKER>

RADIO AND CD PLAYER

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-320

COMMENTS ON TROUBLE SYMPTOM
If the sound is not output from one of the speakers, 
the speaker, radio and CD player, communication 
line from the radio and CD player to the speakers 
may have a problem.

PROBABLE CAUSES

• Malfunction of speaker

• Malfunctions of radio and CD player

• 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.

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?

AC701094

Connector: C-103 <LHD>

AJ

AC701122 DC

Connectors: C-103 <RHD>

AC612730

Connectors: E-02, E-12

AD

E-02 (B)

E-12

AC612731

Connectors: E-04, E-10

AD

E-04 (B)

E-10

AC612733

Connector: E-21

AB

AC612732

Connector: E-22

AB

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-321

YES (normal for all) : 

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 (abnormal for all) : 

Check the radio and CD 

player power supply and earth circuit, and 
repair if necessary. If the radio and CD 
player power supply and earth circuit is 
normal, replace the radio and CD player.

NO (Either a speaker is abnormal) : 

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

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

STEP 4. 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: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the speaker or tweeter.

STEP 5. Connector check: C-103 radio and CD 
player connector.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. Check the wire harness between the 
speaker or tweeter connector terminal and the 
radio and CD player connector terminal.
Check the communication lines for open circuit or 
short circuit.

• <Front door speaker (LH)> Check the wire har-

ness between E-12 front door speaker (LH) con-
nector terminal No.1, 2 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)> Check the wire har-

ness between E-10 front door speaker (RH) con-
nector terminal No.1, 2 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 wire 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 wire 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.

• <Tweeter (LH)> Check the wire harness between 

E-02 tweeter (LH) connector terminal No.1, 2 and 
C-103 radio and CD player connector terminal 
No.38, 28.

NOTE: Prior to the wiring harness inspection, check 

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

• <Tweeter (RH)> Check the wire harness between 

E-04 tweeter (RH) connector terminal No.1, 2 
and C-103 radio and CD player connector termi-
nal No.36, 26.

NOTE: Prior to the wiring harness inspection, check 

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

Q: Is the check result normal?

YES : 

Replace the radio and CD player.

NO : 

Repair the wiring harness.