Mitsubishi Outlander (2013+). Manual - part 53

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-7

CONSTRUCTION DIAGRAM

System component and function

ACB05569 AB

Engine-ECU

Diagnosis connector

ABS/ASC-ECU

Combination meter

4WD-ECU

4WD switch

Electronic control coupling

ETACS-ECU

Drive mode indicator

< Standard meter>

< High contrast meter>

Drive mode display

CVT-ECU

Steering wheel sensor

Parts name

Functional description

Engine ECU

Sends the following signals required by 4WD-ECU via CAN 
communication.

• Engine torque signal

• Throttle position signal

• Engine speed signal

CVT-ECU

Sends the following signals required by 4WD-ECU via CAN 
communication.

• Gear position signal

ABS/ASC-ECU

Sends the following signals required by 4WD-ECU via CAN 
communication.

• ABS sensor signal (4 wheels speed signal)

• ABS/ASC operation signal

• 4WD limitation torque signal

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-8

Steering wheel sensor

Sends the following signals required by 4WD-ECU via CAN 
communication.

• Steering angle signal

4WD switch

Sends the drive mode switch signal (4WD) to 4WD-ECU.

ETACS-ECU

Receives drive mode-related information (4WD ECO, 4WD AUTO, 4WD 
LOCK), failure information and protection information from the 4WD-ECU, 
and then sends them to the combination meter.

4WD-ECU

Calculates the optimum differential limitation force judging from the vehicle 
condition and present drive mode based on the signals from each ECU and 
switch, and controls the current value flown to the electronic control 
coupling.

Controls the indicators (4WD ECO, 4WD AUTO, 4WD LOCK) in the 
combination meter.

Controls the self-diagnostic function and fail-safe function.

Controls diagnostic function (Compatible with M.U.T.-III).

Electronic control coupling

Transmits the torque corresponding to the current value controlled by 
4WD-ECU to the rear wheels.

Drive mode indicator

Integrated in the combination meter, and indicates the selected drive mode.

• When the 4WD system fails or is protected, the "4WD-E" or"LOCK" 

indicator will flash simultaneously or alternately, and the system 
automatically will enter the front wheel drive mode to protect the drive 
system components, and the drive mode changeover with the 4WD 
switch will become unavailable. <Standard meter>

• When the 4WD system fails or is protected, a message will be 

displayed, and the system automatically will enter the front wheel drive 
mode to protect the drive system components, and the drive mode 
changeover with the 4WD switch will become unavailable. <High 
contrast meter>

• The drive mode signal from 4WD-ECU is sent to the combination meter 

via ETACS-ECU using CAN communication.

Diagnosis connector

Outputs the diagnosis code and establishes the communication with 
M.U.T.-III.

Parts name

Functional description

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-9

System configuration

ACC00455 AB

Engine

ABS/ASC-ECU

Transmission

Combination meter

4WD-ECU

4WD switch

Electronic control coupling

NOTE:The dashed line indicates CAN communication lines (CAN-C, CAN-C-Mid).

Engine-ECU

ETACS-ECU

Diagnosis
connector

CAN-C

CAN-C-Mid

CAN-C

CVT-ECU

Steering wheel
sensor

ELECTRONICALLY CONTROLLED 4WD

REAR AXLE

27-10

Control schematic diagram

ACC00456

4WD-ECU

4WD switch
(4WD ECO
 4WD AUTO
 4WD LOCK)

Engine-ECU
· Engine r/min
· Engine torque

ABS/ASC-ECU
· 4 wheels speed
· 4WD torque reduction
  requirement
· Yaw rate, longitudinal
  and lateral acceleration

Coupling torque

Combination meter
· Drive mode indicator 
  or display
· Fail information

Diagnosis output

ABS/ASC-ECU
· Drive mode
· Coupling torque

AB

CAN-C

CAN-C-Mid

CAN-C

ETACS-ECU
· Vehicle information
· Key position
· Battery voltage
· 

Ambient temperature

· Stop lamp switch

ETACS-ECU

NOTE:The dashed line indicates CAN communication
            lines (CAN-C, CAN-C-Mid).

CVT-ECU
· Gear position

Steering wheel sensor
· Steering angle