Mitsubishi L200. Manual - part 760

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-407

SPECIFICATION OF DISPLAY ITEM

DISPLAY BUTTON AND FUNCTION

SOFTWARE UPDATE (S/W Update)
The software of the hands free ECU can be updated.

Displayed name

Detail

VOL

The volume of the sound input to the microphone unit and output 
through the speaker while the hands free ECU is in diagnosis 
mode. (The sound volume can be changed by operating the 
multivision display.)

Parts No

The part number of the hands free ECU is displayed in 8 digits.

H/W version

The hardware version information of the hands free ECU is 
displayed in 2 digits.

S/W version

The software version information of the hands free ECU is 
displayed in 7 digits.

HFM Self Check

The hands free ECU state is displayed.

• "OK": Normal (There is no abnormality in the hands free ECU.)

• "NG": Abnormal (The hands free ECU may have a problem.)

NOTE: If "NG" is displayed, turn the electric motor switch to the 
"OFF" position once. Then, turn the electric motor switch to the 
"ON" position, and enter into the diagnosis mode. When the 
HFM Self Check display is NG again, the hands free ECU is 
determined to be defective.

HFM MIC Check

Displays the communication condition of the hands free ECU and 
the microphone unit.

• "OK": Normal (There is no short circuit or open circuit in the line 

between the microphone unit and the hands free ECU.)

• "NG (Short)": This message is displayed when the line between 

the microphone unit and the hands free ECU is shorted.

• "NG (Open)": (This message is displayed when there is an open 

circuit in the line between the microphone unit and the hands 
free ECU.)

Display button

Detail

S/W Update

Execution button for software update of the hands free ECU 
(Displayed only when the update is possible.)

Error Code

Error Code screen is displayed. (This button is displayed in gray 
when "HFM Self Check" is "OK.")

Unlock

Forcibly unlocks the 4-digit passcode that was set by the security 
function. (When the module is not locked by passcode, the "Unlock" 
button is displayed in gray.)

Back

Returns to "Service" screen.

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-408

NOTE: 

.

•

"S/W Update" is displayed when an USB that 
contains files to update the hands free ECU is 
connected.

•

When the software update cannot continue 
because of improper removal of the USB during 
the update or of an incorrect update code, the 
display returns to the "Hands Free Module" 
screen. At this time, warning is not displayed.

1. Press "S/W Update."

2. Select "Yes." (When "No" is selected, the display 

returns to the "Hands Free Module" screen.)

3. Input the 4-digit code for update. ("Enter" is 

displayed in gray until the 4-digit code is input.)

4. Update starts if the 4-digit code is normal.

NOTE: 

.

•

When the input code is normal, the speaker 
will not output the sound input to the micro-
phone unit until the display returns to the 
"Hands Free Module" screen.

•

When the data rewriting operation is failed, the 

error screen is displayed.

5. The "Reboot" screen is displayed when the 

update is completed successfully.

Hands Free Module

VOL  25

S/W Update

Unlock

Back

Error Code

Parts No.

H/W version

S/W version

HFM Self Check

HFM MIC Check

NG

OK

XX

XX. YY.  ZZZ

XXXXXXXX

AC903643

AB

Hands Free Module

VOL 25

.

Update HFM S/W to version XX.YY.ZZZ?

Yes

No

AC903646

AB

Hands Free Module

Enter the security code (1-6 / 4 Digits).

Clear

Back

1  

3

2

1

6

5

4

9

8

7

0

AC903980

Enter

AB

Hands Free Module

0%

HFM Reflash in Progress.

Please don’t remove Power or USB Device.

AC903648

AB

Hands Free Module

OK

Reflash Failed. Please check to make sure the USB 

device contains the software update and is connected 

then cycle power. If you continue to see this message 

please replace the Hands Free Module. 

AC903650

AB

Hands Free Module

HFM is rebooting ...

AC903651

AB

Hands Free Module

OK

Update successfully.

Version is XX.YY.ZZZ

AC903652

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-409

6. After the hands free ECU is rebooted, the "Update 

successfully." screen is displayed. When "OK" is 
selected, the display returns to the "Hands Free 
Module" screen.

ERROR CODE
The error code is displayed to show the internal state 
of the module.
NOTE: This code shows the internal state of the 
hands free ECU. Do not determine that the module is 
defective even when an error code is displayed. Be 
sure to diagnose the module before replacing it.

1. Press "Error Code."

NOTE: "Error Code" is displayed when the "HFM 
Self Check" is "NG."

2. When "Back" is selected, the display returns to 

the "Hands Free Module" screen.

UNLOCK
Forcibly unlocks the 4-digit passcode that was set by 
the security function.

NOTE: When the module is not locked by passcode, 
the "Unlock" button is displayed in gray.

1. Press "Unlock."

NOTE: "Error Code" is displayed when the "HFM 
Self Check" is "NG."

2. When "Yes" is selected, "Lock mode canceled" 

will be displayed and the passcode lock will be 
unlocked.
NOTE: When "No" is selected, the display returns 
to the "Hands Free Module" screen.

3. The display returns to the "Hands Free Module" 

screen after 4 seconds.

TROUBLE SYMPTOM CHART

M1546001801807

NOTE: Some Bluetooth

®

 devices may not be com-

patible with the hands free ECU

Hands Free Module

VOL  25

S/W Update

Unlock

Back

Error Code

Parts No.

H/W version

S/W version

HFM Self Check

HFM MIC Check

NG

OK

XX

XX. YY.  ZZZ

XXXXXXXX

AC903643

AB

Hands Free Module

Back

0 0 1

Error Code

AC904735

Hands Free Module

VOL  25

S/W Update

Unlock

Back

Error Code

Parts No.

H/W version

S/W version

HFM Self Check

HFM MIC Check

NG

OK

XX

XX. YY.  ZZZ

XXXXXXXX

AC903643

AB

Hands Free Module

VOL 25

.

Do you want to cancel lock mode?

Yes

No

AC903653

AB

Hands Free Module

VOL 25

Lock mode canceled.

AC903654

AB

HANDS FREE-ECU

CHASSIS ELECTRICAL

54A-410

Inspection 
Procedure No.

Trouble symptom

Reference 
page

1

Check the hands free ECU power supply circuit.

P.54A-411

2

The USB memory device data cannot be replayed. <Vehicles with radio and 
CD player>

P.54A-414

The USB memory device data cannot be replayed. <Vehicles with MMCS>

P.54A-415

3

When the speech switch is pressed, the voice information is output, but the 
voice recognition is not performed.

P.54A-417

4

When the speech switch is pressed, the voice information is not output.

P.54A-419

5

DIAGNOSIS MODE cannot be made an entry.

P.54A-421

6

Steering wheel voice control switch illumination does not come on.

P.54A-422

7

Voice guide "Unable to obtain vehicle speed. Please try again or contact your 
dealer for service" is sent from the speaker.

P.54A-423