Mitsubishi Outlander (2013+). Manual - part 693

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-257

HOW TO TERMINATE THE SERVICE 
MODE

If the operations below are done, the service mode 
will be terminated.

•  If "Back" button is selected on "Service" screen, 

the service mode will terminate and then return to 
the previous screen.

DIAGNOSIS MODE

Hands Free Module

NOTE: 

.

•

While the hands free-ECU is in diagnosis mode, 
connection with the Bluetooth

®

 device is shut 

down.

•

Unit Diagnosis

Versions Indication

Monitor Adjustment

Serial Number Information

System Language Setting

Hands Free Module

Vehicle Setting

Memory Initialization

Back

Next

Previous

12:00

Service

ACC00176

While the hands free-ECU is in diagnosis mode, 
the sound input to the microphone unit is output 
directly through the speaker.

1. When you select "Hands Free Module" button on 

"Service" screen, the handsfree system will be 
diagnosed.

Back

Error Code

XXXXXXXX

Parts No.

H/W Version

XX.XX.XXX

S/W Version

OK

HFM Self Check

NG(Open)

HFM MIC Check

12:00

17 

VOL

Hands Free Module

ACC00204

2. The diagnosis result will be displayed.

HFM Self Check

• "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 ignition switch to 

the "OFF" position once. Then, turn the ignition 
switch to the "ON" position, and enter into the 
diagnosis mode. When the HFM Self Check dis-
play is NG again, the hands free-ECU is deter-
mined to be defective.

HFM MIC Check

• "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.

•

Back

Error Code

001

002

003

004

005

006

007

008

12:00

Hands Free Module

ACC00205

"NG (Open)": This message is displayed when 
there is an open circuit in the line between the 
microphone unit and the hands free-ECU.

3. If the result of "HFM Self Check" is "NG", an error 

code will be displayed by selecting "Error Code."

TROUBLE SYMPTOM CHART

M1546001801971

NOTE: Some Bluetooth

®

 devices may not be com-

patible with the hands free-ECU

Trouble symptom

Inspection 
Procedure 
No.

Reference 
page

Check the hands free-ECU power supply circuit.

1

P.54A-258

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-258

SYMPTOM PROCEDURES

Inspection Procedure 1: Check the hands free-ECU power supply circuit.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the earth circuit and the communi-
cation circuit are normal.

CIRCUIT OPERATION

• The handsfree-ECU is energised via the fusible 

link.

• The ACC signal is received through the radio and 

CD player connector.

PROBABLE CAUSES

• Malfunction of the hands free-ECU

• Malfunction of the radio and CD player

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Resistance measurement at hands 
free-ECU connector (GND terminal).
(1) Disconnect hands free-ECU connector, and 

measure at the wiring harness side.

(2) Check the continuity between GND terminal and 

earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 3

NO : 

Go to Step 2

STEP 2. Check of open circuit in GND line 
between hands free-ECU connector and body 
earth.

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 : 

Repair the connector(s) or wiring harness.

STEP 3. Voltage measurement at hands free-ECU 
connector (+B terminal).
(1) Disconnect hands free-ECU connector, and 

measure at the wiring harness side.

(2) Measure the voltage between +B terminal and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5

NO : 

Go to Step 4

STEP 4. Check of short to power supply, short to 
earth, and open circuit in +B line between fusible 
link and hands free-ECU connector.

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 : 

Repair the connector(s) or wiring harness.

STEP 5. Voltage measurement at hands free-ECU 
connector (ACC terminal).
(1) Disconnect hands free-ECU connector, and 

The USB adapter data cannot be replayed.

2

P.54A-259

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

3

P.54A-260

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

4

P.54A-260

DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not 
displayed on the MENU screen of display audio.

5

P.54A-261

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

6

P.54A-262

Trouble symptom

Inspection 
Procedure 
No.

Reference 
page

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-259

measure at the wiring harness side.

(2) Turn the ignition switch to "ACC" position.
(3) Measure the voltage between ACC terminal and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Replace the hands free-ECU.

NO : 

Go to Step 6

STEP 6. Check of short to power supply, short to 
earth, and open circuit in ACC line between 
hands free-ECU connector and radio and CD 
player connector.

Q: Is the check result normal?

YES : 

Replace the radio and CD player.

NO : 

Repair the connector(s) or wiring harness.

Inspection Procedure 2: The USB adapter data cannot be replayed.

CAUTION

Before replacing the hands free-ECU, ensure that 
the power supply circuit, the earth circuit and the 
communication circuit are normal. Check that the 
USB memory device or iPod

® is also normal.

COMMENTS ON TROUBLE SYMPTOM

If the sound replay is impossible with the USB mode, 
the USB adapter, USB cable, hands free-ECU, or 
radio and CD player may be defective, or a commu-
nication error between the radio and CD player and 
hands free-ECU may have occurred.

NOTE: Before troubleshooting, check that the music 
file (the customer tried to replay) can be replayed. 

PROBABLE CAUSES

• The radio and CD player may be defective.

• The hands free-ECU may be defective.

• The USB adapter may be defective.

• The USB cable may be defective.

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the radio and CD player 
operation.
Check if the radio and CD player normally and the 
sound is output.

Q: Is the check result normal?

YES : 

Go to Step 2

NO : 

Troubleshoot the radio and CD player. 
(Refer to 

P.54A-228

.)

STEP 2. Check the diagnosis mode
Check if the hands free-ECU can be switched to the 
diagnosis mode. (Refer to 

P.54A-254

 <Vehicles with 

1CD audio> or 

P.54A-256

 <Vehicles with display 

audio>.)

Q: Is the check result normal?

YES : 

Go to Step 3

NO : 

Perform Inspection Procedure 5 
"DIAGNOSIS MODE cannot be made an 
entry." (Refer to 

P.54A-261

.)

STEP 3. Check the USB adapter.
Check that the continuity exists between the front 
side terminals of USB adapter and rear side termi-
nals of USB adapter. (Refer to 

P.54A-249

.)

Q: Is the check result normal?

YES : 

Go to Step 4

NO : 

Replace the USB adapter.

STEP 4. Check the USB cable.
Check that the USB cable is connected to the USB 
adapter or hands free-ECU normally. Or check the 
USB cable for damage such as bend.

Q: Is the check result normal?

YES : 

Go to Step 5

NO : 

Replace or repair the USB cable.

STEP 5. Check of short to power supply, short to 
earth, and open circuit in AAL+, AAR+ line 
between hands free-ECU connector and radio 
and CD player connector.

Q: Is the check result normal?

YES : 

Go to Step 6

NO : 

Repair the connector(s) or wiring harness.

STEP 6. Replace the hands free-ECU temporarily, 
and check the trouble symptom.
Replace the hands free-ECU temporarily, and check 
that the sound is output from the speaker.

Q: Is the check result normal?

YES : 

Replace the hands free-ECU.

NO : 

Replace the radio and CD player.

HANDS FREE ECU

CHASSIS ELECTRICAL

54A-260

Inspection Procedure 3: When the speech switch is pressed, the voice guide is output, but the voice 
recognition is not performed.

CAUTION

Before replacing the hands free-ECU, ensure that 
the power supply circuit, the earth circuit and the 
communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

When the speech switch is pushed, if the voice guide 
is sent but voice recognition is not executed, the 
microphone unit, hands free-ECU or the communica-
tion between the microphone unit and hands 
free-ECU may have a problem. It may also be possi-
ble that the voice recognition is interfered by external 
noise.

PROBABLE CAUSES

• The hands free-ECU may be defective.

• The microphone unit may be defective.

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Retest the system
 Close all the windows to suppress external noise as 
much as possible. Then check whether the voice rec-
ognition operates normally when you utter a word as 
close to the microphone unit as possible

Q: Is the check result normal?

YES : 

Diagnosis complete.

NO : 

Go to Step 2

STEP 2. Check the diagnosis mode
Check if the microphone check result "HFM MIC 
Check" is displayed on the diagnosis mode of hands 
free-ECU. (Refer to 

P.54A-254

 <Vehicles with 1CD 

audio> or 

P.54A-256

 <Vehicles with display audio>.)

Q: Is the check result normal?

YES : 

Go to Step 4

NO : 

Go to Step 3

STEP 3. Check of short to power supply, short to 
earth, and open circuit in MIC+, MIC- line 
between hands free-ECU connector and 
microphone unit connector.

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 : 

Repair the connector(s) or wiring harness.

STEP 4. Replace the microphone unit 
temporarily, and check the trouble symptom.

Q: Is the check result normal?

YES : 

Replace the microphone unit.

NO : 

Go to Step 5

STEP 5. Replace the hands free-ECU temporarily, 
and check the trouble symptom.

Q: Is the check result normal?

YES : 

Replace the hands free-ECU.

NO : 

The trouble can be an intermittent 
malfunction (Refer to GROUP 00, How to 
use Troubleshooting/inspection Service 
Points, How to Cope with Intermittent 
Malfunction ).

Inspection Procedure 4: When the speech switch is pressed, the voice guide is not output.

CAUTION

Before replacing the hands free-ECU or radio and 
CD player, ensure that the power supply circuit, 
the earth circuit and the communication circuit 
are normal.

COMMENTS ON TROUBLE SYMPTOM

If the voice guide is not sent when the steering wheel 
remote control switch (speech switch) is pushed, the 

communication between the radio and CD player 
and the hands free-ECU, or the communication 
between the radio and CD player and the steering 
wheel remote control switch, the hands free-ECU or 
the steering wheel remote control switch may have a 
problem.

PROBABLE CAUSES

• The radio and CD player may be defective.