Mitsubishi L200. Manual — part 746
MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
CHASSIS ELECTRICAL
54A-351
Inspection Procedure 3: No sound is heard from one of the speakers. <Vehicles with audio amplifier>
CAUTION
Before replacing the multivision display or audio
amplifier, ensure that the power supply circuit,
the earth circuit, and the communication circuit
are normal. (Check that the voltage is 10 V or
more.)
TWEETER (LH)
TWEETER (RH)
FRONT DOOR
SPEAKER (LH)
FRONT DOOR
SPEAKER (RH)
Speaker System Circuit
AUDIO AMPLIFIER
REAR DOOR
SPEAKER (RH)
REAR DOOR
SPEAKER (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
NOTE
:LHD
:RHD
MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
CHASSIS ELECTRICAL
54A-352
COMMENTS ON TROUBLE SYMPTOM
If the sound is not heard from one of the speakers,
the speaker, multivision display, audio amplifier, com-
munication line from the multivision display to the
audio amplifier, or communication line from the audio
amplifier to the speaker may have a problem.
PROBABLE CAUSES
• Malfunction of speaker
• Malfunctions of multivision display
• Malfunction of audio amplifier
• Damaged wiring harness and connectors
DIAGNOSIS PROCEDURE
STEP 1. Checking with speaker test
Perform the speaker test, 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 (normal for all) :
The trouble can be an
intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
Malfunction ).
NO (Either a speaker, a tweeter is abnormal) :
Go
to Step 2.
AUDIO AMPLIFIER
MULTIVISION DISPLAY
Audio Amplifier 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
MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
CHASSIS ELECTRICAL
54A-353
STEP 2. Connector check: E-19 <LH>, E-11 <RH>
front door speaker connector, E-22 <LH> or E-09
<RH> rear door speaker connector, E-24 <LH>, E-
25 <RH> tweeter connector
Q: Is the check result normal?
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. <speaker
or tweeter>
Q: Do the speaker or tweeter output the noise?
YES :
Go to Step 4.
NO :
Replace the speaker or tweeter.
STEP 4. Connector check: D-30 <tweeter> or D-
31 <front door speaker or rear door speaker>
audio amplifier connector .
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair the defective connector.
AC502334AB
Harness side
Connector: E-09
AC509954AR
Harness side
Connectors: E-11, E-25
E-11
E-11
Harness side
E-25
E-25
AC509952
Connectors: E-19, E-24
AS
Harness side
Harness side
E-19
E-24
E-24
E-19
AC502333AB
Connector: E-22
Harness side
AC903885AB
Connectors: D-30, D-31 <LHD>
D-30
Harness side
D-31
Harness side
D-30
D-31
AC903886 AB
Connectors: D-30, D-31 <RHD>
D-30
Harness side
D-31
Harness side
D-30
D-31
MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)
CHASSIS ELECTRICAL
54A-354
STEP 5. Check the wiring harness between the
speaker or tweeter connector terminal and the
audio amplifier connector terminal.
Check the communication lines for open circuit and
short circuit.
•
<Front door speaker (LH)> Check the wire harness
between E-19 front door speaker (LH) connector
terminal No.1, 2 and D-31 audio amplifier con-
nector terminal No.8, 18.
NOTE:
Prior to the wiring harness inspection, check interme-
diate connectors C-134 and C-58, and repair if
necessary.
AC903885AC
Connector: D-31 <LHD>
Harness side
AC903886 AC
Connector: D-31 <RHD>
Harness side
AC509952
Connector: E-19
AB
Harness side
AC903853
Connector: C-58 <LHD>
AO
AC903868
Connector: C-58 <RHD>
AT
AC903856AG
Connector: C-134 <LHD>
Harness side
AC903865
Connector: C-134 <RHD>
AF
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