Mitsubishi Outlander XL. Manual — part 665

STEP 3. M.U.T.-III diagnostic trouble code
Check that the diagnostic trouble code C102B is also set.

Q:Is DTC C102B also set?

YES:

Perform the diagnosis for the diagnostic trouble

code C102B. (Refer to P.35C-28.)

NO:

Go to Step 4.

STEP 4. Check for wheel speed sensor installation
Check how the wheel speed sensor <RR> is installed
(Disconnection of wheel speed sensor, loose mounting bolt,
etc.).

Q:Is the check result normal?

YES:

Go to Step 5.

NO:

Reinstall the wheel speed sensor correctly.

STEP 5. Check for wheel speed sensor as a single unit
Refer to P.35C-197.

Q:Is the check result normal?

YES:

Go to Step 6.

NO:

Replace the wheel speed sensor.

STEP 6. 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 <RL> for looseness. (Refer
to GROUP 27A - On-vehicle Service P.27A-4(FWD) or GROUP 27B
- On-vehicle Service P.27B-15(AWD).)

Q:Is the check result normal?

YES:

Go to Step 7.

NO:

Replace the rear wheel hub assembly.

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-67

DIAGNOSIS

STEP 7. Check of wheel speed detection encoder

ZC601558 0000

Magnetic
encoder

Rear hub
assembly

Rear wheel bearing

Ball bearing

Rear hub
assembly

Magnetic
encoder

<FWD>

<AWD>

Check the encoder for adhesion of foreign materials or
deformation.

Q:Is the check result normal?

YES:

Go to Step 8.

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.

NO (Deformation):

Replace the rear wheel hub assembly.

STEP 8. Check whether the diagnostic trouble code is reset.

(1)

Erase the diagnostic trouble code.

(2)

Drive the vehicle at 12mph (20 km/h) or more.

NOTE:

The ABS warning light does not turn OFF in some

cases unless the vehicle runs at 12mph (20 km/h) or
higher.

Q:Is DTC C1035 set?

YES:

Replace the ASC-ECU.

NO:

Intermittent malfunction. (Refer to GROUP 00 - How

to Cope with Intermittent Malfunction P.00-15.)

35C-68

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS

DTC C1041: Abnormality in periodical signal for FL wheel speed sensor

M13506100022USA0000010000

Wheel Speed Sensor Circuit

ASC-ECU

FRONT
WHEEL
SPEED
SENSOR
(LH)

FRONT
WHEEL
SPEED
SENSOR
(RH)

REAR
WHEEL
SPEED
SENSOR
(LH)

REAR
WHEEL
SPEED
SENSOR
(RH)

If there is any problem in the CAN bus lines, an incorrect
diagnostic trouble code may be set. Prior to this diagnosis,
diagnose the CAN bus lines. (Refer to GROUP 54D, Trouble
code diagnosis P.54D-17).

CIRCUIT OPERATION

｠

The wheel speed sensor is a kind of a pulse generator. 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.

DTC 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
diagnostic trouble code.

ACTIVE SKID CONTROL SYSTEM (ASC)

35C-69

DIAGNOSIS

PROBABLE CAUSES

｠

Wheel bearing malfunction

｠

Deformation of the wheel speed detection encoder

｠

Missing teeth of the wheel speed detection encoder

｠

Adhesion of foreign materials on the wheel speed detection
encoder

｠

ASC-ECU malfunction

DIAGNOSIS

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

｠

MB991997: ASC check harness

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool 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 54D - CAN

Bus Diagnostics table P.54D-17.) On completion, go to
Step 2.

STEP 2. Diagnostic trouble code recheck after resetting
CAN bus lines

Q:Is DTC C1041 set?

YES:

Go to Step 3.

NO:

The procedure 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 <FL> for looseness. (Refer
to GROUP 26 - On-vehicle Service P.26-8.)

Q:Is the check result normal?

YES:

Go to Step 4.

NO:

Replace the wheel bearing.

STEP 4. Check of wheel speed detection encoder

ZC601555

Oil seal

Magnetic
encoder

0000

Wheel
bearing

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
magnetization pattern on it while taking care of the
magnet, magnetic substance, and magnetic attraction. When
the encoder is deformed, replace the wheel bearing.

NO (Deformation):

Replace the wheel bearing.

35C-70

ACTIVE SKID CONTROL SYSTEM (ASC)

DIAGNOSIS