Mitsubishi Montero (2002-2004). Manual - part 1145

 

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Mitsubishi Montero (2002-2004). Manual - part 1145

 

 

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-197

.

CIRCUIT OPERATION
The Active skid control system OFF indicator light is 
connected from the ignition switch (IG1) through 
multi-purpose fuse No.6 and the combination meter 
to the M-ASTC-ECU. The M-ASTC-ECU turns on 
and off the indicator light.

.

TECHNICAL DESCRIPTION (COMMENT)
This symptom is caused by a shorted Active skid 
control system OFF indicator light circuit.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this condition:)

• Damaged wiring harness

• Malfunction of M-ASTC-ECU

.

AC204546 AB

CONNECTOR: D-03

D-03 (GR)

AC204547AC

CONNECTORS: D-208, D-210

D-208

D-210

JUNCTION BLOCK
(FRONT VIEW)

AC203901AG

CONNECTOR: E-121

E-121

AC204548

E-122

AO

CONNECTOR: E-122

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-198

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. 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.00-6

. Then go to Step 2.

Q: Is the harness wire between combination meter 

connector D-03 terminal 51 and M-ASTC-ECU connector 
E-121 terminal 82 damaged?
NO :  
Replace the M-ASTC-ECU and then go to Step 2.
YES : Repair it and then go to Step 2.

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-199

STEP 2. 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-111

.

ACTUATOR TEST REFERENCE

M1353001300023

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-II 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

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-200

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)

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-II SCAN 
TOOL DISPLAY

ITEM 
NO.

CHECK ITEM

PARTS TO BE 
ACTIVATED

ACTIVATION 
WHEN THE 
SYSTEM 
FAILS

 

 

 

 

 

 

 

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