Mitsubishi Outlander (2013+). Manual - part 146

ADAPTIVE CRUISE CONTROL SYSTEM (ACC)

ENGINE AND EMISSION CONTROL

17-10

CONSTRUCTION DIAGRAM

ACC00481

ACB04414

ACB04416

ACB04452

SET

120

km/h

ACC00485

ACC00483

Engine-ECU

Relay box

ETACS-ECU

Cruise control switches

Engine-ECU

Inhibitor switch

Throttle body assembly 
(Built-in throttle position 
sensor and throttle valve 
control servo)

Stop lamp switch

Hydraulic unit Assembly 
(Built-in ASC-ECU)

Accelerator pedal
(Built-in accelerator
pedal position sensor)

Cruise control display screen

Multi information
display

Diagnosis connector

AB

CVT-ECU or A/T-ECU

Steering wheel sensor

ACC/FCM-ECU

RES + or
SET -

CANSEL

ACC ON/OFF

Speed limiter ON/OFF

ACC distance

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ADAPTIVE CRUISE CONTROL SYSTEM (ACC)

ENGINE AND EMISSION CONTROL

17-11

COMPONENTS AND FUNCTIONS

Component

Function

ACC/FCM-ECU

• ACC status is changed based on the ACC/ cruise control 

system/ adjustable speed limitation control mode and on the 
signal of switch state sent from engine-ECU.

• Signals of the ACC status (off, standby, active, temporary fail 

and system fail) are changed state and sent.

• Acceleration/deceleration are calculated from the ACC 

status, subject vehicle speed and data which the radar 
detects, and Acceleration/deceleration are sent to ASC-ECU.

ASC-ECU

• The ASC-ECU controls brake pressure based on signals of 

acceleration/deceleration and the target deceleration 
received from ACC/FCM-ECU.

• ASC-ECU triggers the stop lamp when the automatic brake is 

activated.

• ASC-ECU internal ACC status is switched based on basically 

signal of ACC status received from ACC/FCM-ECU and sent 
as signal.

• Target engine torque and target primary speed <Vehicles for 

CVT> are sent engine-ECU according to the 
acceleration/deceleration received from ACC/FCM-ECU.

Combination 
meter

ACC display screen

Contents of display and buzzer are changed according to signal 
of ACC status, Display request and buzzer request sent from 
ACC/FCM-ECU when signal of control mode sent from 
engine-ECU is ACC ON.

Cruise control 
switches

ACC ON/OFF switch

Power switch for ACC.

NOTE: 

.

•

The system activates by pressing the switch briefly (within 1.5 
seconds).

•

The cruise control system activates by pressing the switch for 
certain period (1.5 seconds or more).

ACC distance switch

The distance from vehicle travelling in front is set with the 
distance switch.

CVT-ECU <Petrol engine>

Target primary is changed from general control map to cruise 
control system, ACC control map according to signals of cruise 
control system control flag, and T/M is controlled by accelerator 
pedal position sensor and target primary speed which are 
received from engine-ECU.

A/T-ECU <Diesel engine>

Control map is changed from general control map to cruise 
control system, ACC control map according to signals of cruise 
control system control flag, and T/M is controlled by accelerator 
pedal position sensor which are received from engine-ECU.

Diagnosis connector

If the M.U.T.-III is connected, the diagnosis code and data list 
from the ACC/FCM-ECU can be read.

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ADAPTIVE CRUISE CONTROL SYSTEM (ACC)

ENGINE AND EMISSION CONTROL

17-12

CONSTRUCTION AND OPERATION

M2170002000908

• ACC status is changed based on the ACC/ cruise 

control system/ adjustable speed limitation con-
trol mode and on the signal of switch state sent 
from engine-ECU. ACC set distance signal of the 
steering switch are received from ETACS-ECU. 

• Signals of the ACC status (off, standby, active, 

temporary fail and system fail) are changed state 
and sent.

• Acceleration/deceleration are calculated from the 

ACC status, subject vehicle speed and data 
which the radar detects, and Acceleration/decel-
eration are sent to ASC-ECU.

• Signals of display request and buzzer request are 

sent to the combination meter.

Engine-ECU

• Signals of state of steering switches (including failure 

judgement result) are sent.

• Acceleration/deceleration are controlled according to ACC 

target torque received from ASC-ECU when ACC mode is 
ON and ACC status is active. Engine-ECU has cruise control 
module as a part of engine-ECU. ACC target torque which is 
sent from ASC-ECU through signal is input to the cruise 
control module. Cruise control module outputs ACC target 
torque to engine-ECU. 

ETACS-ECU

• Stop lamp ON/OFF circuit which is driven at automatic brake 

control by ASC-ECU is equipped.

• The state of ACC set distance switch is sent. 

Steering wheel sensor (SAS)

Signals of the steering angle and the steering angle velocity are 
sent.

Component

Function

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ADAPTIVE CRUISE CONTROL SYSTEM (ACC)

ENGINE AND EMISSION CONTROL

17-13

BLOCK DIAGRAM

SYSTEM FUNCTIONS

DISTANCE FUNCTION

During ACC control, the distance from vehicle travel-
ling ahead can be chosen from three settings.

FAIL-SAFE AND DIAGNOSTIC FUNCTIONS

ACC/FCM-ECU constantly monitors the input and 
output signals. If an error is detected in the system, 
ACC/FCM-ECU sends a fail signal and the corre-
sponding display screen. To ease the system inspec-
tion, the diagnosis code inspection, data list 
inspection is available by M.U.T.-III.

NOTE: For the diagnosis code items and input check 
code items, refer to the Workshop Manual.

ACC00350

ACC/FCM-ECU

Combination meter 
(ACC display screen)

 Cruise control switches
 (ACC distance switch)

ASC-ECU

Engine-ECU

Steering wheel sensor
(SAS)

CVT-ECU
or A/T-ECU

ETACS-ECU

Switch signal (CAN)

ACC status 
or brake control request 
or target deceleration 
(CAN)

Stop lamp 
activation

Cruise control switches 
mode (CAN)

Steering angle or 
steering angle velocity
 (CAN)

System failure
 (CAN)

ACC display and buzzer
 request (CAN)

AB

Stop lamp switch

Stop lamp

Switch signal

Switch signal

Switch signal

     ACC status 
or target engine torque 
or target primary speed
 (CAN)

Vehicle speed 
or yaw rate 
or acceleration
/deceleration 
etc (CAN)

Brake switch

 Cruise control switches
(ACC/ cruise control/ 
speed limiter)

Cruise control control flag, 
accelerator pedal position,
target primary speed (CAN)

ACC ON/OFF display contents
(CAN)

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