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.
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