Mitsubishi Montero (2002-2004). Manual - part 1147

M-ASTC CONTROL UNIT(M-ASTC-ECU)

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-205

M-ASTC CONTROL UNIT(M-ASTC-ECU)

REMOVAL AND INSTALLATION

M1353002500020

INSTALLATION SERVICE POINTS

.

>>A<< M-ASTC-ECU INSTALLATION

CAUTION

Perform the following initialization procedure, otherwise 
the following DTCs will be set.

• DTC No.81: G NO ADJ
• DTC No.84: TF NO CHECK
• DTC No.85: M/CYL PRS NO CHECK

When installing a new M-ASTC-ECU, perform the initialization 
as follows, ensuring that the vehicle remains level.

1. Place the selector lever in the "P" position.

Pre-removal and Post-installation Operation
• Indicator Panel, Lower Center Panel Removal and instal-

lation (Refer to GROUP 52A, Floor Console 

P.52A-7

.)

AC204232

5.0 ± 1.0 N·m
44 ± 9 in-lb

1

3

AB

2

REMOVAL STEPS

>>B<<

• CANCELLING THE HBB BUZZER 

OPERATION CHECK MODE (WHEN 
REPLACING THE ABS-ECU)

1. M-ASTC-ECU CONNECTOR

2. GROUND

>>A<<

3. M-ASTC-ECU

REMOVAL STEPS (Continued)

ABS SENSOR

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-206

2. Connect scan tool MB991502 to the data link connector.

3. Turn the ignition switch to the "ON" position.
4. Execute item No.16 "G SNSR: " on the Actuator test.
5. Depress the brake pedal by a pressure of approximately 40 

kg quickly once.

6. Move the transfer lever through all positions (2H, 4H, 4HLc, 

4LLc).

7. Turn the ignition switch to the "LOCK" (OFF) position.
8. Disconnect scan tool MB991502.

.

>>B<< CANCELLING THE HBB BUZZER OPERATION 
CHECK MODE (WHEN REPLACING THE ASTC-ECU)
If the ignition switch is turned to the "ON" position after replac-
ing the M-ASTC-ECU, the HBB buzzer will sound for approxi-
mately five seconds. This is because the M-ASTC-ECU is at 
the HBB buzzer operation check mode (for factory production 
line). To stop the tone alarm, carry out one of the following pro-
cedures.

• Erase HBB diagnostic trouble codes by using scan tool 

MB991502 or special tool MB991529. Refer to GROUP 
35A, HBB Trouble Code Diagnosis 

P.35A-14

.

• Drive the vehicle at 40 km/h (25 mph) or more.

ABS SENSOR

REMOVAL AND INSTALLATION

M1354004300014

Refer to GROUP 35B, ABS sensor 

P.35B-124

.

ACX01539AE

MB991502

16-PIN

G AND YAW RATE SENSOR

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-207

G AND YAW RATE SENSOR

 REMOVAL AND INSTALLATION

M1354003900013

CAUTION

Do not drop or shock the G and yaw rate sensor.

INSTALLATION SERVICE POINT

.

>>A<< G AND YAW RATE SENSOR INSTALLATION
If the G and yaw rate sensor is replaced, park the vehicle on a 
level surface and follow the procedure below.

1. Connect scan tool MB991502 to the data link connector.

2. Turn the ignition switch to the "ON" position.
3. Execute item No.16 "G SNSR: " on the Actuator test.
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991502.

Pre-removal and Post-installation Operation
• Floor console removal and installation (Refer to GROUP 

52A, Floor Console 

P.52A-7

.)

AC204233AB

1

2

GROUNDING BOLT

5.0 ± 1.0 N·m
44 ± 9 in-lb

5.0 ± 1.0 N·m
44 ± 9 in-lb

REMOVAL STEPS

>>A<<

1. G AND YAW RATE SENSOR
2. G AND YAW RATE SENSOR 

BRACKET

ACX01539AE

MB991502

16-PIN

STEERING WHEEL SENSOR

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-208

STEERING WHEEL SENSOR

 REMOVAL AND INSTALLATION

M1354004100010

INSTALLATION SERVICE POINT

.

>>A<< STEERING WHEEL SENSOR INSTALLATION
When the battery is removed, the neutral point of the steering 
wheel sensor will be erased, the Active skid control system 
OFF indicator light will illuminates and DTC 83 (ST NO ADJ) 
will be set. In this case, make the steering wheel sensor learn 
the neutral point by following one of the procedures below.

Using scan tool MB991502

1. Connect scan tool MB991502 to the data link connector.

2. Turn the ignition switch to the "ON" position.
3. Turn the steering wheel 8

° or more, and then return it to the 

neutral (straight forward) position.

4. Execute item No.14 "ST SNSR: 0 " on the Actuator test.
5. Ensure that the Active skid control system OFF indicator 

light is off.

6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Disconnect scan tool MB991502.

Pre-removal and Post-installation Operation
• Steering wheel and Air bag module assembly removal 

and installation (Refer to GROUP 37A, Steering wheel 

and shaft assembly 

P.37A-23

.)

AC204272

1

2

AB

REMOVAL STEPS

1. CLOCK SPRING AND COLUMN 

SWITCH ASSEMBLY (REFER TO 
GROUP 52B, AIR BAG MODULE 
AND CLOCK SPRING 

P.52Ba-33

.)

>>A<<

2. STEERING WHEEL SENSOR

ACX01539AE

MB991502

16-PIN