Mitsubishi Outlander XL. Manual - part 1275

DIFFERENTIAL MOUNT

ZC5017870000

Rear suspension
crossmember

Upper stopper

Differential carrier

Electronic control coupling

Rear differential mount 
front bracket (LH)

Rear differential
mount insulator

Lower stopper

Weight

Rear differential mount
front bracket (RH)

The front side of the differential carrier is installed to
the rear suspension crossmember via rear differential
mount  front  bracket  (LH/RH).  The  rear  side  of  the
differential carrier is installed to the rear suspension

crossmember via rear differential mount insulator. In
this  way,  the  three-point  support  type  differential
mount  and  the  optimization  of  the  layout  reduces
vibration and noise.

ELECTRONIC CONTROL AWD

GENERAL INFORMATION

M22700000001USA0000010000

｠

Electronic  control  AWD  ensures  performance,
lighter and smaller body, and better fuel economy.

｠

The electronic control AWD controls the torque of
the electronic control coupling located between the
propeller shaft and rear differential. This strategy is
enabled  by  varying  the  torque  distribution  to  the
front and rear wheels from the status closer to the
front wheel drive to the status closer to the direct
coupling AWD and realizes the optimal drive force
according to the various driving conditions.

AIMS OF DEVELOPMENT
Lightweight and simple construction of the electronic
control  AWD  achieves  good  fuel  efficiency  and
provides enjoyment of selecting the drive mode.

27-6

REAR AXLE

ELECTRONIC CONTROL AWD

FUNCTION

｠

The  adoption  of  the  electronic  control  coupling
prevents the tight corner braking phenomenon*and
satisfies the traction performance.

NOTE: 

 *Tight corner braking indicates the

following condition: When the AWD vehicle turns
sharply on a pavement at low speed (ex. parallel
parking), the rotational radius of the front and
rear wheels differs, and this difference can no
longer be compensated by the tire slippage. At
this time, the driver feels as if the brake was
applied.

｠

The electronic control AWD receives the signals of
the  throttle  position  and  vehicle  speed  via
CAN*communication  protocol,  detects  the  vehicle
driving  condition  and  operation  of  the  driver,  and
distributes the proper torque to the rear wheels.

NOTE: 

 *: For more information about CAN

(Controller Area Network), refer to GROUP 54C.

｠

Under  severe  driving  conditions,  the  system  is
protected by minimizing the limitation force of the
differential.

｠

During  high-speed  driving,  the  fuel  efficiency  is
improved  by  reducing  the  limitation  force  of  the
differential.

｠

The following drive modes are available according
to the drivers' preference to provide the enjoyment
of selecting functions.

Drive
mode

Control content

Appeal points

FWD

Minimizes

 the

limitation  force  of
the differential.

High  fuel  efficiency
mode  which  enables
smoother

 turning

performance  of  the
FWD vehicle

AWD

Increases

 the

limitation  force  of
the

 differential

according  to  the
different  rotation
speed  of  the  front
and  rear  wheels
and  the  throttle
position.

Universal

 mode

which  automatically
distributes  the  drive
force  to  the  rear
wheels as necessary

LOCK

Further  increases
the limitation force
of  the  differential
compared  to  the
AWD mode.

Mode  which  has  an
excellent

 driving

performance

 when

driving

 on

 rough

roads  or  in  stuck
situation and enables
powerful driving

REAR AXLE

27-7

ELECTRONIC CONTROL AWD

CONSTRUCTION DIAGRAM

ZC5018010000

ASC-ECU

AWD-ECU

ETACS-ECU

Electronic
control
coupling

Drive mode
selector

Drive mode
selector

Drive mode indicator

Engine-ECU

Diagnosis
connector

Combination
meter

Drive mode indicator

Vehicles for Canada

Vehicles for USA

 

System component and function

Parts name

Functional description

Engine ECU

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

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REAR AXLE

ELECTRONIC CONTROL AWD

Parts name

Functional description

｠

Engine torque signal

｠

Throttle position signal

｠

Engine speed signal

ASC-ECU

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

｠

ABS sensor signal (wheel speed signal) [4 wheels]

｠

ABS operation signal

｠

AWD limitation torque signal

Drive mode selector

Sends the drive mode switch signal [FWD/AWD/LOCK] to AWD-ECU.

ETACS-ECU

｠

Receives  the  drive  mode  switch  signal  [FWD/AWD/LOCK]  from  AWD-
ECU  and  flashes  the  indicators  (AWD  operation  indicator  and  LOCK
indicator) in the combination meter.

｠

Flashes the indicators (AWD operation indicator and LOCK indicator) in
the combination meter in case of failure.

Controls diagnostic function (Compatible with scan tool).

AWD-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 (AWD operation indicator and LOCK indicator) in the
combination meter.
Controls the self-diagnostic function and fail-safe function.
Controls diagnostic function (Compatible with scan tool).

Electronic control coupling

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

Drive mode indicator

｠

AWD operation indicator

｠

LOCK indicator

Integrated in the combination meter, and indicates the selected drive mode
(Not displayed in FWD mode).

｠

When the AWD operation indicator and LOCK indicator flash alternately,
the system automatically enters the front wheel drive mode to protect the
drive system components, and the drive mode changeover with the drive
mode selector becomes unavailable.

｠

When  the  drive  system  generates  heat,  the  AWD  operation  indicator
flashes.

｠

The  indicator  lamp  operation  signal  from  AWD-ECU  is  sent  to  the
combination meter via ETACS-ECU using CAN communication.

Data link connector

Outputs the diagnostic trouble code and establishes the communication with
scan tool.

REAR AXLE

27-9

ELECTRONIC CONTROL AWD