Mitsubishi Montero (2002-2004). Manual — part 1060

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-111

DATA LIST REFERENCE TABLE

M1352011500401

The following items can be read by the scan tool
from the M-ASTC-ECU input data.

MUT-II SCAN
TOOL
DISPLAY*

ITEM
NO.

CHECK ITEM

CHECKING REQUIREMENTS

NORMAL VALUE

ACCUM
SW(PH)

77

Accumulator switch (PH) Accumulator fluid pressure

reduces to less than approx. 16.1
MPa

ON

Accumulator fluid pressure
reaches approx. 18.3 MPa

OFF

ACCUM
SW(PL)

76

Accumulator switch (PL) Accumulator fluid pressure

reduces to approx. 10.8 MPa or
less.

ON

M-ASTC OFF
SW

37

Active skid control
switch

Set the active skid control switch
to the neutral position

OFF

Turn the active skid control switch
to the OFF position

ON

M-ASTC ON
SW

38

Active skid control
switch

Set the active skid control switch
to the neutral position

OFF

Turn the active skid control switch
to the ON position

ON

BATT.
VOLTAGE

31

M-ASTC-ECU power
supply voltage

Ignition switch power supply
voltage and valve monitor voltage

6.5

− 22.3 V

ENGINE
SPEED

17

Engine speed

Drive the vehicle

The scan tool and the
tachometer readings
are approximately the
same

EN. TYPE/
DESTN

28

Engine model and
destination

−

6G75 NAS

FR SNSR

11

Front right ABS sensor

Drive the vehicle

Vehicle speeds
displayed on the
speedometer and
scan tool are identical.

FL SNSR

12

Front left ABS sensor

G SENS
VOLT 1

22

Output 1 from G sensor Drive the vehicle

-14.7

− 14.7 m/s

2

G SENS
VOLT 2

23

Output 2 from G sensor

G SENSOR
VOLT

19

Output from G sensor
(longitudinal
acceleration)

G
S(LATERAL)

20

Output from G sensor
(lateral acceleration)

IDLE POS.
SW

75

Closed throttle position
switch

Do not depress the accelerator
pedal

ON

Depress the accelerator pedal

OFF

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-112

TR SWITCH

26

Transmission range
switch

Drive the vehicle

The shift lever position
indicator and the scan
tool readings are
equal

M/C PRESS.
SNSR

24

Master cylinder pressure
sensor

When depressing gradually the
brake pedal, the output value will
change.

Approximately 0.5 -
4.5 V

MOTOR RLY 79

Motor relay

Motor relay is operating

ON

Motor relay is not operating

OFF

RR SNSR

13

Rear right ABS sensor

Drive the vehicle

Vehicle speeds
displayed on the
speedometer and
scan tool are identical.

RL SNSR

14

Rear left ABS sensor

SHIFT
POSIT.

27

Shift position

Drive the vehicle

The shift lever position
indicator and the scan
tool readings are
equal

ST ANGLE

32

Steering wheel angle

Steering wheel angle

deg (approximately
the same as actual
steering wheel angle)

STOPLIGHT
SW

36

Stoplight switch

Depress the brake pedal.

ON

Release the brake pedal.

OFF

T/F MODE

30

Transfer position

Drive the vehicle.

the same as actual
transfer position

VALVE RLY

78

Valve relay

Valve relay is operating

ON

Valve relay is not operating

OFF

MUT-II SCAN
TOOL
DISPLAY*

ITEM
NO.

CHECK ITEM

CHECKING REQUIREMENTS

NORMAL VALUE

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-113

ACTUATOR TEST REFERENCE

M1352011600378

CAUTION

When performing the item No. 09 [AIR BLEEDING
(1)] consecutively, keep the interval of 20 sec-
onds or more between respective bleeding oper-
ations.
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 ABS VALVE

01

Solenoid valve for front-right wheel HBB select solenoid

valves and control
solenoid valves for the
respective channel

Disabled

FL ABS VALVE

02

Solenoid valve for front-left wheel

RR ABS VALVE

03

Solenoid valve for rear-right wheel

RL ABS VALVE

04

Solenoid valve for rear-left wheel

ABS AIR B.1

09

Air bleeding (1)

HBB select solenoid
valves and control
solenoid valve OUT (FR,
FL)

Disabled

ABS AIR B.2

10

Air bleeding (2)

HBB control solenoid
valve OUT (RR, RL)

Disabled

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-114

ACX01113AC

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

1s

2s

ITEM No. 01 - 04 DRIVE PATTERN

CONTROL SOLENOID
VALVE IN

CONTROL SOLENOID
VALVE OUT

SELECT SOLENOID
VALVE (FR)

SELECT SOLENOID
VALVE (FL)

CORRESPONDING
WHEEL BRAKE PRESSURE

INCREASE

DECREASE

HOLD

INCREASE

ITEM No. 09, 10 DRIVE PATTERN

CONTROL SOLENOID
VALVE OUT (RH)*

CONTROL SOLENOID
VALVE OUT (LH)*

<ITEM No. 10 ONLY>

SELECT SOLENOID
VALVE (FR)

SELECT SOLENOID
VALVE (FL)

NOTE
*: WHEN CARRYING OUT ITEM No. 09, THE FRONT WHEELS ARE DRIVEN, AND WHEN
CARRYING OUT ITEM No. 10 THE REAR WHEELS ARE DRIVEN.

0.8s 0.8s

2.5s

0.8s

2.5s

0.8s 0.8s