Mitsubishi Montero (2004+). Manual - part 1124

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-207

STEP 2. Check the harness wires between combination 
meter connector D-03 terminal 51 and M-ASTC-ECU 
connector E-121 terminal 82.
NOTE: After inspecting combination meter connector combina-
tion meter connector D-03, intermediate connector E-122 and 
M-ASTC-ECU connector E-121, inspect the wire. If combina-
tion meter connector D-03, intermediate connector E-122 and 
M-ASTC-ECU connector E-121 are damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 3.

Q: Is the harness wire between combination meter 

connector D-03 terminal 51 and M-ASTC-ECU connector 
E-121 terminal 82 damaged?
YES : Repair it and then go to Step 3.
NO :  Replace the combination meter (printed circuit board) 

and then go to Step 3.

AC204687AD

CONNECTOR: D-03

D-03 (GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AC203901

AC204627AR

CONNECTOR: E-121

E-121

E-121

HARNESS CONNECTOR: 
COMPONENT SIDE

AC204548

E-122(L)

AP

CONNECTOR: E-122

2

1

3

13

12

14

21

10

5

4

6

16

15

17

7 8 9

19

18

20

11

22

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-208

STEP 3. Retest the system.
Q: Does the Active skid control system OFF indicator light 

turn off 3 seconds after start-up?
YES : The procedure is complete.
NO :  Return to Step 1.

DATA LIST REFERENCE TABLE

M1353001200026

The M-ASTC-ECU also controls the ABS system. 
For the Data list reference table, refer to GROUP 
35B, Data List Reference Table 

P.35B-116

.

ACTUATOR TEST REFERENCE

M1353001300034

The scan tool activates the following actuators for 
testing.
NOTE: If the M-ASTC-ECU is inoperative, actuator 
testing cannot be carried out.

NOTE: Actuator testing is only possible when the 
vehicle is stationary. If the vehicle speed during actu-
ator testing exceeds 10 km/h (6 mph), forced actua-
tion will be canceled.

ACTUATOR TEST SPECIFICATIONS

MUT-III SCAN 
TOOL DISPLAY

ITEM 
NO.

CHECK ITEM

PARTS TO BE 
ACTIVATED

ACTIVATION WHEN THE 
SYSTEM FAILS

FR ACTIVE SKID 
CONTROL 
SYSTEM VALVE

05

Solenoid valve for 
front-right wheel

ACTIVE SKID CONTROL 
SYSTEM control solenoid 
valves for the respective 
channel

Disabled

FL ACTIVE SKID 
CONTROL 
SYSTEM VALVE

06

Solenoid valve for 
front-left wheel

RR ACTIVE SKID 
CONTROL 
SYSTEM VALVE

07

Solenoid valve for 
rear-right wheel

RL ACTIVE SKID 
CONTROL 
SYSTEM VALVE

08

Solenoid valve for 
rear-left wheel

HBB MOTOR

11

Pump motor

Drives the pump motor for 
one second.

Disabled

HBB BUZZER

12

Buzzer

Drives the buzzer for 
three seconds.

Disabled

ENG. TRQ DOWN 13

Engine

Engine torque reduction

Disabled

ST SNSR: 0

14

Steering wheel sensor Neutral point in steering 

wheel sensor

Enabled

YAWRATE SNS: 0 15

Yaw rate sensor

Neutral point in yaw rate 
sensor

Enabled

G SNSR: 0

16

G sensor

Neutral point in G sensor Enabled

BRKE WARN LMP 23

Brake warning light

Blink two times the brake 
warning light.

Enabled (However, 
disabled when the brake 
warning light cannot be 
activated)

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-209

CHECK AT M-ASTC-ECU

M1353001400020

The M-ASTC-ECU also controls the ABS system. 
For the terminal voltage reference table, refer to 
GROUP 35B, Check at M-ASTC-ECU 

P.35B-120

.

ABS FAIL LMP

24

ABS warning light

Blink two times ABS 
warning light

Enabled (However, 
disabled when the ABS 
warning light cannot be 
activated)

ACTIVE SKID 
CONTROL 
SYSTEM OP 
LAMP

25

Active skid control 
system operation 
indicator light/Active 
traction control system 
operation indicator 
light

Blink two times the Active 
skid control system 
operation indicator 
light/Active traction 
control system operation 
indicator light

Enabled (However, 
disabled when the Active 
skid control system 
operation indicator 
light/Active traction control 
system operation indicator 
light cannot be activated)

ACTIVE SKID 
CONTROL 
SYSTEM OFF 
LAMP

26

Active skid control 
system OFF indicator 
light

Blink two times the Active 
skid control system OFF 
indicator light

Enabled (However, 
disabled when the Active 
skid control system OFF 
indicator light cannot be 
activated)

MUT-III SCAN 
TOOL DISPLAY

ITEM 
NO.

CHECK ITEM

PARTS TO BE 
ACTIVATED

ACTIVATION WHEN THE 
SYSTEM FAILS

AC205660

ON

OFF

ON

OFF

ON

OFF

3s

ITEM No. 05 - 08 DRIVE PATTERN

CONTROL SOLENOID 
VALVE IN

CONTROL SOLENOID 
VALVE OUT

SELECT SOLENOID 
VALVE
(SA1, SA2, SA3, STR)

CORRESPONDING 
WHEEL BRAKE PRESSURE

HOLD

AB

SPECIAL TOOLS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-210

SPECIAL TOOLS

M1353000600032

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION

APPLICATION

MB991958

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826

MUT-III Sub Assembly

A: Vehicle 

communication 
interface (V.C.I.)

B: MUT-III USB cable
C: MUT-III main harness 

A (Vehicles with CAN 
communication 
system)

D: MUT-III main harness 

B (Vehicles without 
CAN communication 
system)

E: MUT-III main harness 

C (for Daimler Chrysler 
models only)

F: MUT-III measurement 

adapter

G: MUT-III trigger 

harness

MB991824-KIT
NOTE: G: MB991826 
MUT-III trigger harness is 
not necessary when 
pushing V.C.I. ENTER 
key.

Checking diagnostic 
trouble codes

CAUTION

MUT-III main harness B 
(MB991911) should be 
used. MUT-III main 
harness A and C should 
not be used for this 
vehicle.

MB991348
Test harness set

MB991496-OD

For checking of G and 
yaw rate sensor

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

MB991348