Mitsubishi Outlander (2013+). Manual - part 463

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-27

STEP 9. 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 diagnosis code No. C1014, C101F, C102A or

C1035 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 diagnosis code No. C1014, C101F, C102A or

C1035 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 diagnosis code No. C1014, C101F, C102A or

C1035 set?
YES :

Return to Step 1.

NO :

This diagnosis is complete.

Code No. C1041 FL wheel speed tone performance

Code No. C1042 FR wheel speed tone performance

Code No. C1043 RL wheel speed tone performance

Code No. C1044 RR wheel speed tone 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
periodical drop is found in these sensor signals,
ASC-ECU will set the relevant diagnosis code.

PROBABLE CAUSES

• Wheel bearing malfunction

• Deformation of the wheel speed detection

encoder

• Adhesion of foreign materials on the wheel speed

detection encoder

• ASC-ECU malfunction

• The number of poles on the Magnetic encoder for

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

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-28

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.C1041, 1042, 1043 or 1044

set?
YES :

Go to Step 3.

NO :

This diagnosis is complete.

STEP 3. 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 4.

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 6.

STEP 4. 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 5.

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 6.

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 6.

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-29

STEP 5. 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 diagnosis code No. C1041, 1042, 1043 or 1044

set?
YES :

Replace the hydraulic unit (integrated with

ASC-ECU) (Refer to

P.35C-95

). Then go to

Step 6.

NO :

This diagnosis is complete.

STEP 6. 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 diagnosis code No. C1041, 1042, 1043 or 1044

set?
YES :

Return to Step 1.

NO :

This diagnosis is complete.

Code No. C1046 FL wheel speed sensor phase

Code No. C1047 FR wheel speed sensor phase

Code No. C1048 RL wheel speed sensor phase

Code No. C1049 RR wheel speed sensor phase

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-

• 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

This diagnosis code is set if any malfunction below is
found:

• When the brake fluid pressure is decreased for a

long time.

• When the brake fluid pressure is held for a long

time.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• External noise interference

• Malfunction of wheel speed sensor

• ASC-ECU malfunction

• Excessive gap between the wheel speed sensor

and the magnetic encoder for wheel speed detec-
tion

• Adhesion of foreign materials on the wheel speed

sensor

• Adhesion of foreign materials on the magnetic

encoder for wheel speed detection

• Wheel bearing malfunction

• Improper installation of the wheel speed sensor

• Deformation of the magnetic encoder for wheel

speed detection

• Disturbance of magnetization pattern for mag-

netic encoder for wheel speed detection

• Missing teeth of the magnetic encoder for wheel

speed detection

DIAGNOSTIC 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?

TROUBLESHOOTING

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-30

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.C1046, C1047, C1048 or

C1049 set?
YES :

Go to Step 3.

NO :

This diagnosis is complete.

STEP 3. M.U.T.-III diagnosis code

Code No.C1046 is set

• Check that the diagnosis codes No.C100A,

C1011, C1014, and C1041 are also set.

Code No.C1047 is set

• Check that the diagnosis codes No.C1015,

C101C, C101F, and C1042 are also set.

Code No.C1048 is set

• Check that the diagnosis codes No.C1020,

C1027, C102A, and C1043 are also set.

Code No.C1049 is set

• Check that the diagnosis codes No.C102B,

C1032, C1035, and C1044 are also set.

Q: Are the diagnosis codes set?

YES :

Carry out the diagnosis for the relevant

diagnosis codes.

NO :

Go to Step 4.

STEP 4. M.U.T.-III data list
Check the following data list (Refer to

P.35C-85

• Item No.01: FL wheel speed sensor

• Item No.02: FR wheel speed sensor

• Item No.03: RL wheel speed sensor

• Item No.04: RR wheel speed sensor

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Go to Step 5.

STEP 5. Check the wiring harness between the
ASC-ECU connector terminal and the wheel
speed sensor connector terminal

Code No.C1046 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.C1047 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.C1048 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.C1049 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 6.

NO :

Repair the connector(s) or wiring harness.
Then go to Step 12.

STEP 6. 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 7.

NO :

Reinstall the wheel speed sensor correctly
(Refer to

P.35C-97

<front> or

P.35C-97

<rear>). Then go to Step 7.

STEP 7. Check for wheel speed sensor output
current
Refer to

P.35C-90

Q: Is the check result normal?