Mitsubishi L200. Manual — part 742

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-335

STEP 10. Check the wiring harness between C-
1684 multivision display connector terminal
No.72 and D-30 audio amplifier connector
terminal No.35

• Check the communication lines for open circuit

and short circuit.

NOTE: Prior to the wiring harness inspection, check
intermediate connector C-59, and repair if necessary.

Q: Is the check result normal?

YES :

Go to Step 11.

NO :

Repair the wiring harness.

STEP 11. Check the following connectors
Check the following connectors:

• E-19 front door speaker (LH) connector

• E-11 front door speaker (RH) connector

• E-22 rear door speaker (LH) connector

• E-09 rear door speaker (RH) connector

• E-24 tweeter (LH) connector

• E-25 tweeter (RH) connector

Q: Are all the connectors in good condition?

YES :

Go to Step 12.

NO :

Repair the defective connector.

STEP 12. Check the speaker or tweeter.
(1) Remove the speaker or tweeter. Refer to

P.54A-

445

.

(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: Do the speaker or tweeter output the noise?

YES :

Go to Step 13.

NO :

Replace the speaker or tweeter.

STEP 13. Check the wiring harness between the
speaker or tweeter 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-19 front door speaker (LH) con-
nector terminal No.1, 2 and D-31 audio amplifier
connector terminal No.8, 18.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-58 and C-134, and
repair if necessary.

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

ness between E-11 front door speaker (RH) con-
nector terminal No.1, 2 and D-31 audio amplifier
connector terminal No.7, 17.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-58 and C-122, 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-31 audio amplifier
connector terminal No.1, 9.

NOTE: Prior to the wiring harness inspection, check

intermediate connector D-14, and repair if neces-
sary.

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

ness between E-09 rear door speaker (RH) con-
nector terminal No.1, 2 and D-31 audio amplifier
connector terminal No.2, 10.

NOTE: Prior to the wiring harness inspection, check

intermediate connector D-24, and repair if neces-
sary.

• <Tweeter (LH)> Check the wiring harness

between E-24 tweeter (LH) connector terminal
No.1, 2 and D-30 audio amplifier connector termi-
nal No.26, 27.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-16 and C-133, and
repair if necessary.

• <Tweeter (RH)> Check the wiring harness

between E-25 tweeter (RH) connector terminal
No.1, 2 and D-30 audio amplifier connector termi-
nal No.23, 24.

NOTE: Prior to the wiring harness inspection, check

intermediate connectors C-16 and C-121, and
repair if necessary.

Q: Is the check result normal?

YES :

Go to Step 14.

NO :

Repair the wiring harness.

AC707572 AB

5 V

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-336

STEP 14. Check the wiring harness between C-
170 multivision display connector terminal No.2,
3, 7, 8, 11, 12 15, 16 and D-30 audio amplifier
connector No.30, 38, 37, 31, 21, 29, 28, 22.

• Check the communication lines for short circuit.

NOTE: Prior to the wiring harness inspection, check
intermediate connectors C-15 and C-59, and repair if
necessary.

Q: Is the check result normal?

YES :

Go to Step 15.

NO :

Repair the wiring harness.

STEP 15. 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 16.

STEP 16. 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 multivision display.

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-337

Inspection Procedure 3: No sound is heard from one of the speakers. <Vehicles without audio
amplifier>

CAUTION

Whenever the multivision display is replaced,
ensure that the power supply circuit and the
earthing circuit are normal. (Check that the volt-
age is 10 V or more.)

MITSUBISHI MULTI COMMUNICATION SYSTEM (MMCS)

CHASSIS ELECTRICAL

54A-338

COMMENTS ON TROUBLE SYMPTOM
If the sound is not heard from one of the speakers,
the speaker, multivision display or communication
line from the multivision display to the speaker may
have a problem.

PROBABLE CAUSES

• Malfunction of speaker

• Malfunction of multivision display

• Damaged harness wires and connectors

NOTE

:LHD
:RHD

<DOUBLE CAB>

TWEETER (RH)

MULTIVISION DISPLAY

REAR DOOR
SPEAKER (LH)

REAR DOOR
SPEAKER (RH)

FRONT DOOR
SPEAKER (RH)

FRONT DOOR
SPEAKER (LH)

TWEETER (LH)

<VEHICLES WITH TWEETER>

<VEHICLES WITH TWEETER>

Speaker 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