Mitsubishi Outlander XL. Manual - part 582

DIAGNOSIS

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: Vehicle Communication Interface

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

Inspection  Procedure  1:  Scan  tool  MB991958  cannot
communicate with the Electronic Control AWD System. Refer to
ECU power supply circuit system check P.27C-75.

DATA LIST REFERENCE TABLE

M12704100035USA0000010000

M.U.T.-III can read the following items among various
control data (input data from each ECU and switch)
used by the electronic control AWD system.

SYSTEM IS NORMAL.

Item No.

Check item

Check condition

Normal condition

01

Vehicle

 speed

(AWD  calculated
value)

Perform a test run of the vehicle.

The  speedometer
display  and  the
M.U.T.-III  display
almost  agree  with
each other.

02

Ignition

 power

supply voltage

Ignition switch: ON

0 - 16 V

03

Coupling torque

Ignition switch: ON

0  -  1200  N·m  (0  -
885 ft-lb)

04

Coupling  current
(command
value)

｠

Drive mode selector: AWD

｠

Perform a test run of the vehicle.

The

 current

changes  between
0

 and

 5

 A.

(Command  value
and  actual  value
agree  with  each
other.)

05

Coupling  current
(monitor value)

｠

Drive mode selector: AWD

｠

Perform a test run of the vehicle.

The

 current

changes  between
0

 and

 5

 A.

(Command  value
and  actual  value
agree  with  each
other.)

06

Coupling
temperature

Perform a test run of the vehicle.

0 - 200°C (0 - 392°
F)

07

CAN

 system

(ABS/ASC)

Ignition  switch:
ON

When  ASC-ECU  data  is  correctly
received

OK

When  ASC-ECU  data  reception  error
occurs

No reception

ELECTRONIC CONTROL AWD

27C-87

DIAGNOSIS

Item No.

Check item

Check condition

Normal condition

08

CAN

 system

(engine)

Ignition  switch:
ON

When  engine-ECU  data  is  correctly
received

OK

When engine-ECU data reception error
occurs

No reception

09

CAN

 system

(ETACS)

Ignition  switch:
ON

When  ETACS-ECU  data  is  correctly
received

OK

When ETACS-ECU data reception error
occurs

No reception

10

FWD SW

Ignition  switch:
ON

Drive mode selector: FWD

OFF/ON

11

LOCK SW

Ignition  switch:
ON

Drive mode selector: LOCK

OFF/ON

15

AWD mode

Ignition  switch:
ON

Shifting in progress

-

AWD LOW
AWD HIGH
FWD
Neutral
AWD (part-time)

16

FL  wheel  speed
sensor

Perform a test run of the vehicle.
Check  that  there  is  difference  between  the  right  wheel
speed and the left wheel speed when the vehicle turns.

The  speedometer
display  and  the
M.U.T.-III  display
almost  agree  with
each other.

17

FR  wheel  speed
sensor

18

RL  wheel  speed
sensor

19

RR  wheel  speed
sensor

21

Engine speed

Perform a test run of the vehicle.

The

 tachometer

display  and  the
M.U.T.-III  display
almost  agree  with
each other.

23

Ignition position

｠

LOCK

｠

OFF

｠

ACC

｠

ON

｠

START

-

24

Engine torque

Perform a test run of the vehicle.

The

 torque

changes  between
0 and 300 N·m (0 -
221 ft-lb).

26

Throttle position Ignition  switch:

ON

Release the accelerator pedal.

Approximately 0%

Gradually  depress  the  accelerator
pedal.

0 - 100%

27C-88

ELECTRONIC CONTROL AWD

DIAGNOSIS

Item No.

Check item

Check condition

Normal condition

Fully depress the accelerator pedal.

Approximately
100%

 (within

100%)

28

Limited torque

-

0  -  2500  N·m  (0  -
1844 ft-lb)

SYSTEM SHUT-DOWN

M.U.T.-III display data does not agree with the actual
data  when  AWD-ECU  deactivates  the  AWD  control
function by the fail-safe function.

ACTUATOR TEST TABLE

M12704100036USA0000010000

M.U.T-III can be used to forcibly activate the electronic
control  coupling  and  indicators  (AWD  indicator  and
LOCK indicator) in the combination meter according
to the following items.

NOTE:

｠

If AWD-ECU is deactivated by the fail-safe function,
no actuator test can be performed.

｠

As for the item No. 01, the chassis dynamometer is
used  to  check  the  AWD  torque.  A  simple  AWD
status check method, however, can be applied by

checking  whether  a  tight  corner  braking
phenomenon appears during driving.

When  the  item  No.  01  is  checked,  the  speed
difference between front and rear wheels must be
5 km/h (3 mph) or lower. If the speed difference
exceeds 5 km/h (3mph), AWD-ECU changes from
the  actuator  test  mode  to  the  normal  control
mode.

 

Actuator test specifications

Item No.

Check item

Driven component

Operating
duration

01

AWD coupling control torque

Drive the electronic control coupling with
the control torque of 0 N·m to 730 N·m (0
to 538 ft-lb).

Maximum
10 seconds

02

AWD mode

AWD LOCK

Maximum 1
minute

AWD

Maximum 1
minute

FWD

Maximum 1
minute

FREEZE FRAME DATA REFERENCE TABLE

M12704100037USA0000010000

M.U.T-III can be used to read the freeze frame data
(the  driving  status  when  the  failure  occurs)  at  each
diagnosis code detection.

 

FREEZE FRAME DATA SPECIFICATIONS

Item No.

Item

Data display

01

Odometer

Km (mph)

ELECTRONIC CONTROL AWD

27C-89

DIAGNOSIS

Item No.

Item

Data display

02

Ignition cycle

-

03

Coupling torque

N·m (ft-lb)

04

Current trouble accumulative time

min

06

Coupling temperature

°C (°F)

07

CAN communication (ABS/ASC) error flag OFF/ON

08

CAN communication (engine) error flag

OFF/ON

09

CAN communication (ETACS) error flag

OFF/ON

15

AWD mode

FWD
AWD
AWD LOCK

16

FL wheel speed sensor

xxxx km/h (mph)

17

FR wheel speed sensor

xxxx km/h (mph)

18

RL wheel speed sensor

xxxx km/h (mph)

19

RR wheel speed sensor

xxxx km/h (mph)

CHECK AT ECU TERMINALS

M12704100038USA0000010000

ZC3051060000

C-128

Terminal
No.

Check item

Check condition

Normal condition

1

Current command value
of  electronic  control
coupling solenoid

｠

Drive mode selector: AWD

｠

Perform a test run of the vehicle.

0 to 5 A

27C-90

ELECTRONIC CONTROL AWD

DIAGNOSIS