Mitsubishi Montero (2004+). Manual — part 985

TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>

TSB Revision

AUTOMATIC TRANSMISSION

23A-515

STEP 4. Check the harness for open circuit or damage
between transfer-ECU connector E-109 (terminals 6, 8, 10
and 19) and M-ASTC-ECU connector E-121 (terminals 71,
72, 73 and 79).
Q: Are the harness wires in good condition?

YES : Go to Step 5.
NO : Repair or replace the harness wire(s).

STEP 5. Check transfer-ECU connector E-109 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 6.
NO : Repair or replace the damaged components. Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

.

STEP 6. Replace the transfer-ECU.
(1) Replace the transfer-ECU.
(2) Test drive the vehicle.
(3) Check for transfer diagnostic trouble code.
Q: Is DTC 61 set?

YES : Start over at Step 1.
NO : The procedure is complete.

AC204194 BB

CONNECTORS : E-121, E-123

71 72 73 74 75 76

77 78 79 80 81 82

83 84

85 86 87

12

9 10 11

8

7

5 6

16

14

13

15

18

17

19

2

1

3 4

E-121

E-123 (GR)

E-121

E-123

AC204176

CONNECTOR : E-109

BB

11 12

25

24

13

26

9

22

7

6

20

19

8

21

10

23

5

4

17

2

1

15

14

3

16

18

Continue

DATA LIST REFERENCE TABLE

TSB Revision

AUTOMATIC TRANSMISSION

23A-516

23A

DATA LIST REFERENCE TABLE

M1231111300059

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

2/4WD DET
SW

34

2WD/4WD detection
switch

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: 2H or 4H

ON

Transfer shift lever
position: 4HLc or
4LLc

OFF

2WD DET
SW

33

2WD detection switch Ignition switch: ON

Transmission range:
N

Transfer shift lever
position: 2H

ON

Transfer shift lever
position: Other than
2H

OFF

4H DET SW

35

4H detection switch

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: 4H or 4HLc

ON

Transfer shift lever
position: 2H or 4LLc

OFF

4LLC DET
SW

37

4LLc detection switch Ignition switch: ON

Transmission range:
N

Transfer shift lever
position: 4LLc

ON

Transfer shift lever
position: Other than
4LLc

OFF

APP
SENSOR

01

Accelerator pedal
position sensor

Ignition switch: ON
Engine: Stopped
Transmission range:
P

Accelerator pedal:
Fully closed

905

− 1,165

mV

Accelerator pedal:
Depressed

Gradually
rises from the
above value

Accelerator pedal:
Fully open

4,035 mV or
more

C/D LOCK
SW

36

Center differential lock
detection switch

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: 4HLc or
4LLc

ON

Transfer shift lever
position: 2H or 4H

OFF

ENGINE
TYPE

28

Engine type

Ignition switch: ON
Gasoline-fueled
vehicle

GASOLINE

DATA LIST REFERENCE TABLE

TSB Revision

AUTOMATIC TRANSMISSION

23A-517

F/W ENG
SOL

30

Free-wheel engage
solenoid valve

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: 2H

ON

Transfer shift lever
position: Other than
2H

OFF

F/W
ENGAGE SW

38

Free-wheel engage
switch

Engine: Idling
Transmission range:
N
4WD indicator light:
Should not be
flashing

Transfer shift lever
position: 2H

OFF

Transfer shift lever
position: Other than
2H

ON

FL M-ASTC
SIG

40

M-ASTC-ECU

Active traction
control system is
acting on front left
wheel.

ON

Active traction
control system is not
acting on front left
wheel.

OFF

FR2RR SPD
DIF

04

Front to rear propeller
shaft speed difference

Transfer position:
4WD

Driving at constant
speed of 30 km/h (19
mph)

Within 5 km/h
(3.1 mph)

FR M-ASTC
SIG

39

M-ASTC-ECU

Active traction
control system is
acting on front right
wheel.

ON

Active traction
control system is not
acting on front right
wheel.

OFF

FRT PROP
SNSR

02

Front propeller shaft
speed sensor

Transfer position:
4WD

Driving at constant
speed of 30 km/h (19
mph)

30 km/h (19
mph)

IGNITION
SW

21

Ignition switch

Ignition switch: ON

ON

IGNITION
VOLT

09

Ignition switch power
supply (Battery
voltage)

Ignition switch: ON

Battery
positive
voltage

MAIN RELAY
V

08

Main relay output
voltage (Inside ECU)

Ignition switch: ON

Battery
positive
voltage

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

DATA LIST REFERENCE TABLE

TSB Revision

AUTOMATIC TRANSMISSION

23A-518

RL M-ASTC
SIG

42

M-ASTC-ECU

Active traction
control system is
acting on rear left
wheel.

ON

Active traction
control system is not
acting on rear left
wheel.

OFF

RR M-ASTC
SIG

41

M-ASTC-ECU

Active traction
control system is
acting on rear right
wheel.

ON

Active traction
control system is not
acting on rear right
wheel.

OFF

RR PROP
SNSR

03

Rear propeller shaft
speed sensor

Transfer position:
4WD

Driving at constant
speed of 30 km/h (19
mph)

30 km/h (19
mph)

SHIFT SOL
AMP

10

Shift actuator
amperage

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: In operation
(Actuator should be
operating)

0 A

→ 0.2 A −

1.5 A

→ 0 A

SHIFT SOL
TGT

11

Shift actuator target
amperage

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: In operation
(Actuator should be
operating)

0 A

→ 1.4 A −

1.6A

→ 0 A

SHIFT SOL V 12

Shift actuator voltage

Ignition switch: ON
Transmission range:
N

Transfer shift lever
position: 2H

→ 4H or

4H

→ 4HLc or 4HLc

→ 4LLc

1/2 Battery
voltage

→

Battery
voltage

→ 1 V

or less

→ 1/2

Battery
voltage

Transfer shift lever
position: 4LLc

→

4HLc or 4HLc

→ 4H

or 4H

→ 2H

1/2 Battery
voltage

→ 1 V

or less

→ 1/2

Battery
voltage

STOPLIGHT
SW

23

Stoplight switch

Ignition switch: ON

Brake pedal:
Depressed

ON

Brake pedal:
Released

OFF

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION