Mitsubishi Pajero Pinin. Manual - part 245

ABS <4WD> – 

General Information/Service Specifications

35B-3

GENERAL INFORMATION

The ABS consists of components such as the wheel
speed sensors, stop lamp switch, hydraulic unit
assembly (integrated with the ABS-ECU) and the
ABS warning lamp. If a problem occurs in the
system, the malfunctioning components can be

identified and the trouble symptoms will be
memorized by the diagnosis function.
In addition, reading of diagnosis codes and service
data and actuator testing are possible by using the
MUT-

II

.

WHEEL SPEED SENSOR

Type

Magnet coil type

ABS rotor teeth

43

CONSTRUCTION DIAGRAM

Stop lamp switch

ABS warning
lamp

Diagnosis
connector

Wheel speed sensor

Wheel speed sensor

Hydraulic unit
assembly
(integrated with
the ABS-ECU)

G-sensor

SERVICE SPECIFICATIONS

Items

Standard value

Wheel speed sensor internal resistance k

Ω

1.30 – 1.58

Wheel speed sensor insulation resistance k

Ω

100 or more

G sensor output voltage V

When labeled surface is faced to vertical direction

2.4 – 2.6

When labeled surface is faced straight down

3.3 – 3.7

ABS <4WD> – 

Special Tools

35B-4

SPECIAL TOOLS

Tool

Number

Name

Use

MB991502

MUT-

II

 sub 

assembly

For checking of ABS 
(Diagnosis code display when using the
MUT-

II

)

MB991529

Diagnosis code 
check harness

For checking of ABS 
(Diagnosis code display when using the ABS
warning lamp)

MB991547

ABS check 
harness

For measuring of ABS-ECU terminal voltage

MB991348

Test harness set

For checking of G sensor

ABS <4WD> – 

Troubleshooting

35B-5

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.

NOTES WITH REGARD TO DIAGNOSIS

1.

The phenomena listed in the following table are not abnormal.

Phenomenon

Explanation of phenomenon

System check sound

When starting the engine, a thudding sound can sometimes be heard coming from inside
the engine compartment, but this is because the system operation check is being performed,
and is not an abnormality.

ABS operation sound

1.

Sound of the motor inside the ABS hydraulic unit operation. (whine)

2.

Sound is the generated along with vibration of the brake pedal. (scraping)

3.

When ABS operates, sound is generated from the vehicle chassis due to repeated
brake application and release.
(Thump: suspension; squeak: tyres)

System check sound

When depressing the brake pedal during driving, a shock is sometime felt.

2.

For road surfaces such as snow-covered roads and gravel roads, the braking distance for vehicles
with ABS can sometimes be longer than that for other vehicles. Accordingly, advise the customer
to drive safely on such roads by lowering the vehicle speed and not being too overconfident.

3.

Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the “Comment” are satisfied when checking the trouble
symptom again.

Caution
Use the special tool (MB991547) when checking the terminal voltage and resistance of ABS-ECU.

ABS <4WD> – 

Troubleshooting

35B-6

ABS WARNING LAMP INSPECTION

Check that the ABS warning lamp illuminates as follows.
1.

When the ignition key is turned to “ON”, the ABS warning
lamp illuminates for approximately 3 seconds and then
switches off.

2.

When the ignition key is turned to “START”, the ABS
warning lamp remains illuminated.

3.

When the ignition key is turned from “START” back to
“ON”, the ABS warning lamp illuminates for approximately
3 seconds and then switches off.

NOTE
The ABS warning lamp may remain on until the vehicle
reaches a speed of several km/h. This is limited to cases
where diagnosis code Nos.21 to 24, 53 or 55 have been
recorded because of a previous problem occurring. In
this case, the ABS-ECU keeps the warning lamp
illuminated until the problem corresponding to that
diagnosis code can be detected.

4.

If the illumination is other than the above, check the
diagnosis codes.

DIAGNOSIS FUNCTION

READING DIAGNOSIS CODES

Read a diagnosis code by the MUT-

II

 or ABS warning lamp.

(Refer to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.)

NOTE
Connect the MUT-

II

 to the diagnosis connector (16-pin).

ERASING DIAGNOSIS CODES

When using the MUT-

II

Connect the MUT-

II

 to the diagnosis connector (16-pin) and

erase the diagnosis code.

Caution
Turn the ignition key to the LOCK (OFF) position before
connecting or disconnecting the MUT-

II

.

Not illumi-
nated

ABS
warn-
ing
lamp

Illuminated

Approx. 3 s

Approx. 3 s

Ignition
switch

START

ON

ACC,

LOCK

ABS warning lamp