Mitsubishi Outlander (2013+). Manual - part 462

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-23

STEP 7. Check for wheel bearing looseness

NOTE: Loose wheel bearing may increase the gap
between the wheel speed sensor and the wheel
speed detection magnet encoder. Check the wheel
bearing for looseness. <Refer to GROUP 26

−

Wheel

Bearing Axial Play Check . (front), GROUP 27A

−

Wheel Bearing Axial Play Check (rear-2WD) or
GROUP 27B

−

Wheel Bearing Axial Play Check

(rear-4WD)>

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Replace the wheel bearing <front> or rear
wheel hub assembly <rear>. <Refer to
GROUP 26

− Front Axle Hub Assembly

(front), GROUP 27A

− Rear Axle Hub

Assembly (rear-2WD) or GROUP 27B

−

Rear Axle Hub Assembly (rear-4WD)>
Then go to Step 11.

STEP 8. Check of wheel speed detection encoder

AC504925

Oil seal

Magnetic
encoder

Wheel
bearing

<Front>

AC808708

Ball bearing

Rear hub
assembly

Magnetic
encoder

<2WD>

<Rear>

<4WD>

Rear wheel bearing

Rear hub
assembly

Magnetic
encoder

Check the encoder for adhesion of foreign materials
or deformation.

Q: Is the check result normal?

YES :

Go to Step 9.

NO (Adhesion of foreign materials) :

Remove the

foreign materials and clean the encoder so
as not to disturb the magnetization pattern
on it while taking care of the magnet,
magnetic substance, and magnetic
attraction. Then go to Step 11.

NO (Deformation) :

Replace the wheel bearing

<front> or rear wheel hub assembly <rear>.
<Refer to GROUP 26

− Front Axle Hub

Assembly (front), GROUP 27A

− Rear Axle

Hub Assembly (rear-2WD) or GROUP 27B
− Rear Axle Hub Assembly (rear-4WD)>
Then go to Step 11.

STEP 9. Check whether the diagnosis code is

reset.
(1) Erase the diagnosis code.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-24

(2) Drive the vehicle at 20 km/h or higher.

NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 20 km/h
or higher.

Q: Is the diagnosis code No.C1011, C101C, C1027 or

C1032 set?
YES :

Replace the wheel speed sensor (Refer to

P.35C-97

<front> or

P.35C-97

<rear>).

Then go to Step 10.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use Troubleshooting/How to

Cope with Intermittent Malfunctions ).

STEP 10. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 20 km/h or higher.

NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 20 km/h
or higher.

Q: Is the diagnosis code No.C1011, C101C, C1027 or

C1032 set?
YES :

Replace the hydraulic unit (integrated with

ASC-ECU) (Refer to

P.35C-95

). Then go to

Step 11.

NO :

This diagnosis is complete.

STEP 11. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Drive the vehicle at 20 km/h or higher.

NOTE: The ABS warning lamp does not turn OFF
in some cases unless the vehicle runs at 20 km/h
or higher.

Q: Is the diagnosis code No.C1011, C101C, C1027 or

C1032 set?
YES :

Return to Step 1.

NO :

This diagnosis is complete.

Code No. C1014 FL wheel speed sensor performance

Code No. C101F FR wheel speed sensor performance

Code No. C102A RL wheel speed sensor performance

Code No. C1035 RR wheel speed sensor performance

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnosis code may be set. Prior
to this diagnosis, diagnose the CAN bus lines
(Refer to GROUP 54C

− CAN Bus Diagnostics

Table ).

• Whenever ECU is replaced, ensure that the

CAN bus lines are normal.

• When the hydraulic unit (integrated with

ASC-ECU) is replaced, always carry out the
calibration of the steering wheel sensor, the G
and yaw rate sensor and brake fluid pressure
sensor (Refer to

P.35C-93

P.35C-94

and

P.35C-94

OPERATION

• The wheel speed sensor is a kind of a pulse gen-

erator. It consists of encoders (a plate on which
north and south pole sides of the magnets are
arranged alternately) for detecting the wheel
speed which rotates at the same speed of the
wheels and wheel speed sensors. This sensor
outputs frequency pulse signals in proportion to
the wheel speed.

• The pulse signals, which the wheel speed sensor

creates, are sent to ASC-ECU. ASC-ECU uses
the frequency of the pulse signals to determine
the wheel speed.

DIAGNOSIS CODE SET CONDITIONS

ASC-ECU monitors the signals from each wheel
speed sensor while the vehicle is being driven. If any
fault below is found in these sensor signals,
ASC-ECU will set the relevant diagnosis code.

• Missing wheel speed sensor signal

• Wheel speed sensor signal continuously indi-

cates low value.

PROBABLE CAUSES

Current trouble

• Excessive gap between the wheel speed sensor

and the wheel speed detection encoder

• Wheel bearing malfunction

• Deformation of the wheel speed detection

encoder

• Adhesion of foreign materials on the wheel speed

sensor

• Adhesion of foreign materials on the wheel speed

detection encoder

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-25

• Malfunction of wheel speed sensor

• Improper installation of the wheel speed sensor

• ASC-ECU malfunction

• The number of poles on the Magnetic encoder for

wheel speed detection (N-pole and S-pole) is
changed

Past trouble

• When diagnosis code No.C100A, C1015, C1020

or C102B is also set, carry out diagnosis with par-
ticular emphasis on wiring harness and connector
failures between ASC-ECU and the wheel speed
sensor. For diagnosis procedures, refer to How to
treat past trouble (GROUP 00

− How to Use

Troubleshooting/How to Treat Past Trouble ).

• When diagnosis code No.C100A, C1015, C1020

or C102B is not set, the following conditions may
be present:

• Some wheels slip

• Unstable vehicle attitude

• External noise interference

• Vehicle ran with the parking brake applied.

• Rotate only two wheels with drum tester

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the CAN bus lines (Refer to GROUP
54C

− CAN Bus Diagnostics Table ). On

completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting
CAN bus lines

Q: Is the diagnosis code No.C1014, C101F, C102A or

C1035 set?
YES :

Go to Step 3.

NO :

This diagnosis is complete.

STEP 3. M.U.T.-III diagnosis code
Check that diagnosis code No.C100A, C1015,
C1020 or C102B is also set.

Q: Is diagnosis code No.C100A, C1015, C1020 or

C102B also set?
YES :

Perform the diagnosis for diagnosis code

No.C100A, C1015, C1020 or C102B (Refer
to

P.35C-18

NO :

Go to Step 4.

STEP 4. Check the wiring harness between the
ASC-ECU connector terminal and the wheel
speed sensor connector terminal

Code No.C1014 is set

• Check of short to power supply, short to earth,

and open circuit in FL+, FL

− line between

ASC-ECU connector and front wheel speed sen-
sor (LH) connector.

Code No.C101F is set

• Check of short to power supply, short to earth,

and open circuit in FR+, FR

− line between

ASC-ECU connector and front wheel speed sen-
sor (RH) connector.

Code No.C102A is set

• Check of short to power supply, short to earth,

and open circuit in RL+, RL

− line between

ASC-ECU connector and rear wheel speed sen-
sor (LH) connector.

Code No.C1035 is set

• Check of short to power supply, short to earth,

and open circuit in RR+, RR

− line between

ASC-ECU connector and rear wheel speed sen-
sor (RH) connector.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the connector(s) or wiring harness.
Then go to Step 11.

STEP 5. Check for wheel speed sensor
installation
Check how the wheel speed sensor is installed (Dis-
connection of wheel speed sensor, loose mounting
bolt, etc.).

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Reinstall the wheel speed sensor correctly
(Refer to

P.35C-97

<front> or

P.35C-97

<rear>). Then go to Step 6.

STEP 6. Check for wheel speed sensor output
current
Refer to

P.35C-90

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Replace the wheel speed sensor (Refer to

P.35C-97

<front> or

P.35C-97

<rear>).

Then go to Step 10.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-26

STEP 7. Check for wheel bearing looseness

NOTE: Loose wheel bearing may increase the gap
between the wheel speed sensor and the wheel
speed detection magnet encoder. Check the wheel
bearing for looseness. <Refer to GROUP 26

−

Wheel

Bearing Axial Play Check . (front), GROUP 27A

−

Wheel Bearing Axial Play Check (rear-2WD) or
GROUP 27B

−

Wheel Bearing Axial Play Check

(rear-4WD)>

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Replace the wheel bearing <front> or rear
wheel hub assembly <rear>. <Refer to
GROUP 26

− Front Axle Hub Assembly

(front), GROUP 27A

− Rear Axle Hub

Assembly (rear-2WD) or GROUP 27B

−

Rear Axle Hub Assembly (rear-4WD)>
Then go to Step 11.

STEP 8. Check of wheel speed detection encoder

AC504925

Oil seal

Magnetic
encoder

Wheel
bearing

<Front>

AC808708

Ball bearing

Rear hub
assembly

Magnetic
encoder

<2WD>

<Rear>

<4WD>

Rear wheel bearing

Rear hub
assembly

Magnetic
encoder

Check the encoder for adhesion of foreign materials
or deformation.

Q: Is the check result normal?

YES :

Go to Step 9.

NO (Adhesion of foreign materials) :

Remove the

foreign materials and clean the encoder so
as not to disturb the magnetisation pattern
on it while taking care of the magnet,
magnetic substance, and magnetic
attraction. Then go to Step 9.

NO (Deformation) :

Replace the wheel bearing

<front> or rear wheel hub assembly <rear>.
<Refer to GROUP 26

− Front Axle Hub

Assembly (front), GROUP 27A

− Rear Axle

Hub Assembly (rear-2WD) or GROUP 27B
− Rear Axle Hub Assembly (rear-4WD)>
Then go to Step 9.

Content .. 460 461 462 463 ..