Mitsubishi Outlander XL. Manual — part 610

GENERAL INFORMATION

M13502000001USA0000010000

FEATURES

The 4ABS ensures directional stability and control
during hard braking.
This ABS uses a 4-sensor system that controls all four
wheels independently of each other.

｠

EBD*1(Electronic Brake-force Distribution system)
control that can obtain ideal rear wheel brake force
has been employed.

｠

The magnetic encoder for wheel speed detection
has been installed instead of the rotor as the wheel
speed sensor.

｠

For wiring harness saving and secure data
communication, CAN*2bus has been adopted as a
tool of communication with another ECU.

｠

Fail-safe function which ensures that safety is
maintained.

｠

Diagnostic function which provides improved
serviceability.

NOTE:

｠

*1: EBD (Electronic Brake-force Distribution)

｠

*2: For further details on CAN communication, refer
to GROUP 54D, CAN P.54D-3.

｠

On vehicles with ASC, the ABS system is controlled
by the ASC-ECU. For the system construction, refer
to GROUP 35C, General Information P.35C-4.
(Vehicle with ASC)

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-3

GENERAL INFORMATION

CONSTRUCTION DIAGRAM

ZC600661

CHECK

SE R VIC E
RE

Q UIRE D

ASC
OFF

0000

6

7

7

6

1

2

1

2

3

4 <AWD>, 5, 9

8

6

7

<Vehicles for CANADA>

<Except vehicles for CANADA>

Name of part

Num
ber

Outline of function

Sensor

Wheel speed sensor

1

Outputs the frequency signal in proportion to the rotation speed
of each wheel to ABS-ECU.

Magnetic encoder for
wheel speed detection

2

When the magnetic encoder for wheel speed detection (a plate
on which north and south pole sides of the magnets are arranged
alternately) rotates, the wheel speed sensor outputs frequency
pulse signal in proportion to each wheel speed.

Stoplight switch

3

Outputs the signal indicating whether the brake pedal is
depressed or not to ABS-ECU.

35B-4

ANTI-LOCK BRAKING SYSTEM (ABS)

GENERAL INFORMATION

Name of part

Num
ber

Outline of function

G sensor <AWD>

4

Incorporated in ABS-ECU, and detects the longitudinal
acceleration of the vehicle.

Actuator Hydraulic unit

5

Drives the solenoid valve using the signal from ABS-ECU, and
controls the brake fluid pressure for each wheel.

ABS warning light

6

Informs the driver of the system status by illuminating, flashing,
or turning off the warning light according to the signal from ABS-
ECU.

Brake warning light

7

Used as the warning light for the parking brake, brake fluid level,
and EBD control. Informs the driver of the system status by
illuminating, flashing, or turning off the warning light according to
the signal from ABS-ECU.

Data link connector

8

Outputs the diagnostic trouble code and establishes the
communication with the scan tool.

AWD-ECU <AWD>

9

Outputs the vehicle type of FWD or AWD to ABS-ECU.

ABS-ECU

10

Controls actuators (described above) based on the signals
coming from each sensor.
Controls the self-diagnosis and fail-safe functions.
Controls the diagnostic function (scan tool compatible).

SPECIFICATIONS

GENERAL SPECIFICATIONS

M13502000002USA0000010000

Item

Specification

ABS control type

4-sensor

Wheel speed sensor

Magnetic encoder

Front

86 (N-pole: 43, S-pole: 43)

Rear

86 (N-pole: 43, S-pole: 43)

Type

Semiconductor type

SERVICE SPECIFICATIONS

M13502000003USA0000010000

Item

Standard value

Wheel speed sensor current mA

5.9 - 8.4 or 11.8 - 16.8

Wheel speed sensor insulation resistance MΩ

5 or more

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

INTRODUCTION TO ABS DIAGNOSIS

M13502000125USA0000010000

The anti-lock brake system (ABS) operates differently
from conventional brake systems. These differences
include sounds, sensations, and vehicle performance

that owners and service technicians who are not
familiar with ABS may not be used to.

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-5

SPECIFICATIONS

Some operational characteristics may seem to be
malfunctions, but they are simply signs of normal ABS
operation. When diagnosing the ABS system, keep

these operational characteristics in mind. Inform the
owner of the kind of performance characteristics to
expect from an ABS-equipped vehicle.

ABS DIAGNOSTIC TROUBLE CODE DETECTION CONDITIONS

ABS diagnostic trouble codes (ABS DTCs) are set
under different conditions, depending on the
malfunction detected. Most ABS DTCs will only be set
during vehicle operation. Some ABS DTCs will also
be set during the ABS self-check immediately after the
engine is started.
When you check if an ABS DTC will be displayed
again after the DTC has been erased, you should

duplicate the ABS DTC set conditions. Depending on
the detection timing and set conditions for the specific
ABS DTC, you must either drive the vehicle or turn the
engine off and restart it. To set the proper conditions
for that DTC again, refer to "ABS DTC SET
CONDITIONS" for each ABS DTC that you are trying
to reset.

ABS DIAGNOSTIC TROUBLESHOOTING STRATEGY

M13502000111USA0000010000

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
ABS fault.

1.

Gather information about the problem from the
customer.

2.

Verify that the condition described by the customer
exists.

3.

Check the vehicle for any ABS DTC.

4.

If you cannot verify the condition and there are no
ABS DTCs, the malfunction is intermittent. Refer to
GROUP 00, How to use Troubleshooting/
Inspection Service Points - How to Cope with
Intermittent Malfunctions P.00-15.

5.

If you can verify the condition but there are no ABS
DTCs, or the system cannot communicate with the
scan tool, check that the basic brake system is
operating properly.

｠

If the basic brake system is not operating
properly, refer to the GROUP 35A, Basic Brake
System Diagnosis P.35A-5.

｠

If the basic brake system is operating properly,
refer to GROUP 35A, Brake Booster Operating
Check P.35A-16.

6.

If there is an ABS DTC, record the number of the
DTC, then erase the DTC from the memory using
the scan tool.

7.

Recreate the ABS DTC set conditions to see if the
same ABS DTC will set again.

｠

If the same ABS DTC sets again, perform the
diagnostic procedures for the DTC. Refer to P.
35B-9.

｠

If you cannot get the same ABS DTC to set again,
the malfunction is intermittent. Refer to GROUP
00, How to use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent
Malfunctions P.00-15.

DIAGNOSIS FUNCTION

M13502000112USA0000010000

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: Vehicle Communication Interface (V.C.I.)

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

35B-6

ANTI-LOCK BRAKING SYSTEM (ABS)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS