Mitsubishi Outlander XL. Manual - part 610

 

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Mitsubishi Outlander XL. Manual - part 610

 

 

GENERAL INFORMATION

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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

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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

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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

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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

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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

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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

 

 

 

 

 

 

 

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