Mitsubishi L200. Manual - part 758

 

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Mitsubishi L200. Manual - part 758

 

 

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-399

CONSTRUCTION DIAGRAM

ACB01730

ACB01729

Hands free ECU

Heater blower
assembly 

Glove box

Microphone assembly

Microphone assembly

<Vehicles with sunroof>

<Vehicles without sunroof>

Steering wheel 
voice control switch

USB connector

“Speech”
switch

“Pick-up”
switch

“Hang-up” switch

AC

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-400

SYSTEM BLOCK DIAGRAM

ACB00791

Speaker

Steering wheel voice
control switch

 

Bluetooth

R

Phone voice 
         or
      music

Voice

Microphone power

Microphone assembly

Hands free ECU

Radio and CD player
or 
Multivision display

Communication

USB 
connector

 

Music

Audio control

USB device

 

Bluetooth  device

R

AC

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-401

SPECIAL TOOLS

M1544403500210

TROUBLESHOOTING

INTRODUCTION TO DIAGNOSIS

M1544404500291

Prior to the troubleshooting, check if the causes below can be the case. If any, take actions according to the 
solution method.

Tool

Number

Name

Use

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check harness
b. LED harness
c. LED harness 

adapter

d. Probe

Continuity check and voltage 
measurement at harness wire or 
connector

a. For checking connector pin 

contact pressure

b. For checking power supply 

circuit

c. For checking power supply 

circuit

d. For connecting a locally 

sourced tester

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

MB991223

a

d

c

b

DO NOT USE

BA

MB992006

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-402

Pairing of the bluetooth

®device (mobile phone or music player) and hands free ECU cannot be made. 

The hands free ECU does not recognize the bluetooth

®device (mobile phone or music player).

Calling cannot be made using the hands free cellular phone function.

 

Bluetooth

®The music player cannot be replayed.  

The music data received from the USB adapter cannot be replayed.

Cause

SOLUTION

The power of the 
bluetooth

®device is off.

With the power of the bluetooth

®device turned on, check the trouble 

symptom again.

In addition to the 
bluetooth

®device to be 

recognized, two or more 
bluetooth

®device exist in the 

vehicle.

• With the voice operation, select the device to be connected.

• Select the device to be connected on the multivision display.

Power supply abnormality in 
the hands free ECU, or 
communication error 
between the the radio and 
CD player or multivition 
display, and hands free 
ECU.

Turn the electric motor switch to the "ON" position and check if iPod 
connected to the USB adapter or USB device can be played. If the music 
cannot be played, the power supply of hands free ECU or the communication 
between the the radio and CD player or multivition display, and hands free 
ECU may have a problem. Perform the Inspection procedure 2: The USB 
memory device data cannot be replayed (Refer to 

P.54A-414

 <vehicles with 

radio and CD player> or 

P.54A-415

 <vehicles with MMCS>). If the diagnosis 

mode of hands free ECU can be made an entry, the module status can be 
checked by the hands free ECU self-check, however, if the power supply of 
hands free ECU, or the communication with the the radio and CD player or 
multivition display may have a problem, the module status can not be 
checked (Refer to 

P.54A-403

 <vehicles with radio and CD player> or 

P.54A-

406

 <vehicles with MMCS>).

Cause

SOLUTION

The Bluetooth

® connection 

is not made between the 
hands free ECU and 
bluetooth

®device.

Connect the bluetooth

®device to the hands free ECU via Bluetooth®.

The vehicle is not located in 
the communication area of 
the cellular phone.

Check the radio wave condition of the cellular phone shown on the display, or 
check the radio wave condition shown on the cellular phone itself.

AUDIO communication error 
between the hands free ECU 
and the the radio and CD 
player or multivition display.

Check if the data of music file sent to the hands free ECU can be replayed. If 
there are no problems, the communication between the hands free ECU and 
the the radio and CD player or multivition display may have a problem.

 

 

 

 

 

 

 

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