Mitsubishi Galant (2004+). Manual - part 1480

RADIO WITH CD PLAYER

TSB Revision

CHASSIS ELECTRICAL

54A-163

INSPECTION PROCEDURE 6: No Sound from One Speaker. <Vehicles with six speakers>

TWEETER
(RH)

RADIO AND CD PLAYER

REAR
SPEAKER (LH)

REAR 
SPEAKER (RH)

FRONT DOOR 
SPEAKER (RH)

FRONT DOOR 
SPEAKER (LH)

TWEETER
(LH)

Speaker System Circuit <Vehicles without Audio Amplifier>

RADIO WITH CD PLAYER

TSB Revision

CHASSIS ELECTRICAL

54A-164

.

CIRCUIT OPERATION
The speakers sound according to audio signal output 
from the radio and CD player.

.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty speaker circuit sys-
tem.

.

TROUBLESHOOTING HINTS

• Malfunction of the speaker.

• Damaged wiring harness or connector.

• Malfunction of the radio and CD player.

AC305233 CF

CONNECTORS: C-12, C-13, C-108, C-111 

C-12

C-13

C-108 (B)

C-111

AC305231CY

CONNECTORS: C-26, C-28, C-129

C-26

C-28

C-129 (B)

AC305268

D-09

D-12

AT

CONNECTORS: D-09, D-12

AC305333

AM

CONNECTOR: E-02

AC305262

CONNECTOR: E-10

AP

RADIO WITH CD PLAYER

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CHASSIS ELECTRICAL

54A-165

DIAGNOSIS

STEP 1. Check which speaker has no sound on the 
vehicles with audio amplifier.
Determine which speaker does not sound.
Q:  Which speaker does not sound?

Tweeter (LH) : Go to Step 2.
Tweeter (RH) : Go to Step 5.
Front door speaker (LH) : Go to Step 8.
Front door speaker (RH) : Go to Step 11.
Rear speaker (LH) : Go to Step 14.
Rear speaker (RH) : Go to Step 17.

STEP 2. Check the tweeter (LH).
(1) Remove the tweeter (LH). Refer to 

P.54A-220

.

(2) Check that the tweeter (LH) generates noise when a 

five-volt voltage is applied on the tweeter (LH) terminal.

Q: Is the tweeter (LH) generating noise?

YES : Go to Step 3.
NO :  Replace the tweeter (LH). The tweeter (LH) should 

sound.

STEP 3. Check tweeter (LH) connector C-129 and radio and 
CD player connector C-111 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are harness connectors C-129 and C-111 in good 

condition?
YES : Go to Step 4.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

tweeter (LH) should sound.

ACX01868AB

5V

AC305233

HARNESS SIDE

3
9

4

12

14

6

13

5

1110

8

2

7

1

BY

CONNECTOR: C-111

AC305231CX

CONNECTOR: C-129

C-129 (B)

HARNESS SIDE

RADIO WITH CD PLAYER

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CHASSIS ELECTRICAL

54A-166

STEP 4. Check the wiring harness between tweeter (LH) 
connector C-129 (terminals 1 and 2) and radio and CD 
player connector C-111 (terminals 5 and 13).
Q: Is the wiring harness between tweeter (LH) connector 

C-129 (terminals 1 and 2) and radio and CD player 
connector C-111 (terminals 5 and 13) in good condition?
YES : The procedure is complete.
NO :  Repair the wiring harness. The tweeter (LH) should 

sound.

STEP 5. Check the tweeter (RH).
(1) Remove the tweeter (RH). Refer to 

P.54A-220

.

(2) Check that the tweeter (RH) generates noise when a 

five-volt voltage is applied on the tweeter (RH) terminal.

Q: Is the tweeter (RH) generating noise?

YES : Go to Step 6.
NO :  Replace the tweeter (RH). The tweeter (RH) should 

sound.

AC305233

HARNESS SIDE

3
9

4

12

14

6

13

5

1110

8

2

7

1

BY

CONNECTOR: C-111

AC305231CX

CONNECTOR: C-129

C-129 (B)

HARNESS SIDE

ACX01868AB

5V