Mitsubishi Montero (2002-2004). Manual — part 1146

M-ASTC DIAGNOSIS

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-201

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-115

.

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

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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-202

SPECIAL TOOLS

M1353000600021

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991502
Scan tool (MUT-II)

MB991496-OD

For checking of Active
skid control system
[Diagnostic trouble code
display when using the
scan tool (MUT-II)]

MB991348
Test harness set

MB991496-OD

For checking of G and
yaw rate sensor

MB991223
Harness set
A:MB991219
Inspection harness

MB991223
MB991709-01

ABS sensor output
voltage measurement

B991502

MB991348

MB991223

A

AB

B

C

D

ON-VEHICLE SERVICE

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-203

ON-VEHICLE SERVICE

ABS SENSOR OUTPUT VOLTAGE CHECK

M1353004700019

Refer to GROUP 35B, On-Vehicle service

P.35B-119

SOLENOID VALVE CHECK

M1353001700021

Measure the resistance between the following solenoid valve
terminals.

• Control solenoid valve IN (FR): Between terminals (19) −

(34)

• Control solenoid valve OUT (FR): Between terminals (20) −

(34)

• Control solenoid valve IN (FL): Between terminals (21) −

(34)

• Control solenoid valve OUT (FL): Between terminals (22) −

(34)

• Control solenoid valve IN (RR): Between terminals (15) −

(34)

• Control solenoid valve OUT (RR): Between terminals (16) −

(34)

• Control solenoid valve IN (RL): Between terminals (13) −

(34)

• Control solenoid valve OUT (RL): Between terminals (14) −

(34)

• Select solenoid valve (SA1): Between terminals (18) − (34)

• Select solenoid valve (SA2): Between terminals (17) − (34)

• Select solenoid valve (SA3): Between terminals (12) − (34)

• Select solenoid valve (STR): Between terminals (11) − (34)

Standard value:
Control solenoid valve IN: 4.75

− 5.25 Ω

Control solenoid valve OUT: 2.0

− 2.4 Ω

Select solenoid valve: 3.5

− 3.9 Ω

IN THE EVENT OF A DISCHARGED BATTERY

M1353004900013

WARNING

If the ABS is not operating, the vehicle posture will be
unstable during braking. Do not drive the vehicle with
the M-ASTC-ECU connector disconnected or with the
ABS not operating.

If the engine is started using a booster cable when the battery
is completely flat, and the vehicle is then driven without waiting
for the battery to be recharged, the engine may misfire and it
may not be possible to drive the vehicle. This is because the
ABS consumes a large amount of current when carrying out its
initial checks. If this happens, recharge the battery fully.

ACX01116 AB

ON-VEHICLE SERVICE

TSB Revision

MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM

35C-204

Initializing the M-ASTC-ECU (Action to be taken
when the battery is removed

)

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.

Not using scan tool MB991502

CAUTION

1. If a different diameter or size of tires are equipped, the M-

ASTC-ECU may not learn the neutral position.

Turn the steering wheel 8

°or more, and then return the

steering wheel to straight-ahead position.

2. Drive the vehicle straight forward at 35 km/h (25 mph) for

approximately one second.

3. Ensure that the Active skid control system OFF indicator

light is off.

ACX01539AE

MB991502

16-PIN