Mitsubishi Outlander XL. Manual - part 617

DTC SET CONDITIONS
ABS-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, ABS-ECU will set the relevant diagnostic
trouble code.

｠

Irregular change in the wheel speed sensor signal

｠

Wheel speed sensor signal continuously indicates high value.

PROBABLE CAUSES

Current trouble

｠

Excessive  gap  between  the  wheel  speed  sensor  and  the
wheel speed detection encoder

｠

Adhesion of foreign materials on the wheel speed sensor

｠

Adhesion of foreign materials on the wheel speed detection
encoder

｠

Wheel bearing malfunction

｠

Malfunction of wheel speed sensor

｠

Damaged wiring harness and connectors

｠

External noise interference

｠

Improper installation of the wheel speed sensor

｠

Deformation of the wheel speed detection encoder

｠

ABS-ECU malfunction

｠

Disturbance  of  magnetization  pattern  for  wheel  speed
detection encoder

Past trouble

｠

When the diagnostic trouble code No. C100A is also set, carry
out diagnosis with particular emphasis on wiring harness and
connector failures between ABS-ECU and the wheel speed
sensor. For diagnosis procedures, refer to How to treat past
trouble (Refer to GROUP 00 - How to Cope with Intermittent
Malfunction P.00-15).

｠

When the diagnostic trouble code No. C100A is not set, the
following conditions may be present:

｠

Right or/and left wheels are rotated.

｠

Unstable vehicle attitude

｠

External noise interference

｠

Vehicle ran with the parking brake applied.

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

｠

MB991974: ABS 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?

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-31

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

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 C1011 set?

YES:

 Go to Step 3.

NO:

 The procedure is complete.

STEP 3. M.U.T.-III diagnostic trouble code
Check that the diagnostic trouble code No. C100A is also set.

Q:Is DTC C100A also set?

YES:

 Perform the diagnosis for the diagnostic trouble

code No. C100A. (Refer to P.35B-11.)

NO:

 Go to Step 4.

STEP 4. Check for wheel speed sensor installation
Check  how  the  wheel  speed  sensor  <FL>  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

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

Q:Is the check result normal?

YES:

 Go to Step 7.

NO:

 Replace the wheel bearing.

STEP 7. 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 8.

NO:

 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.

35B-32

ANTI-LOCK BRAKING SYSTEM (ABS)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

STEP 8. Voltage measurement at the A-01 ABS-ECU
connector

ZC601293 0016

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU 
harness connector

(1)

Disconnect  the  ABS-ECU  connector,  connect  special  tool
MB991974 to the harness-side connector, and then measure
the resistance at special tool connector side.

NOTE: 

Do not connect the special tool MB991974 to ABS-

ECU.

(2)

Turn the ignition switch to the ON position.

(3)

Measure the voltage between the wheel speed sensor power
supply terminal (signal terminal) No. 18/the ground terminal
No. 19 and the body ground.

OK: 0 volt

Q:Is the check result normal?

YES:

 Go to Step 9.

NO (Not normal at the terminal No. 18 or 19):

 Go to Step

10.

STEP 9. Resistance measurement at A-01 ABS-ECU
connector

ZC601293 0017

Check harness

ABS-ECU

MB991974

A-01 ABS-ECU 
harness connector

(1)

Disconnect  the  ABS-ECU  connector,  connect  special  tool
MB991974 to the harness-side connector, and then measure
the resistance at special tool connector side.

NOTE: 

Do not connect the special tool MB991974 to ABS-

ECU.

(2)

Resistance between the wheel speed sensor power supply
terminal (signal terminal) No. 18/the ground terminal No. 19
and the body ground

OK: No continuity

Q:Is the check result normal?

YES:

 Go to Step 11.

NO (Not normal at the terminal No. 18 or 19):

 Go to Step

10.

STEP 10. Connector check: A-01 ABS-ECU connector, A-11
wheel speed sensor <FL> connector

Q:Is the check result normal?

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-33

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

YES:

 The short circuit in the wheel speed sensor <FL>

circuit may be present. Repair the wiring harness between
the A-01 ABS-ECU connector terminal No. 18/19 and the A-11
wheel speed sensor <FL> connector terminal No. 1/2.

NO:

 Repair the defective connector.

STEP 11. Voltage measurement at the A-01 ABS-ECU
connector

ZC601292 0006

ABS-ECU

MB991974

Check harness

A-01 ABS-ECU 
harness connector

(1)

Disconnect  the  ABS-ECU  connector,  connect  special  tool
MB991974  to  the  ABS-ECU-side  connector  and  harness-
side connector, and then measure the voltage at the special
tool connector side.

(2)

Turn the ignition switch to the ON position.

(3)

Measure the voltage between the wheel speed sensor circuit
power supply terminal (signal terminal) No. 18 and the body
ground.

OK: Approximately battery voltage

Q:Is the check result normal?

YES:

 Go to Step 14.

NO:

 Go to Step 12.

STEP 12. Connector check: A-01 ABS-ECU connector, A-11
wheel speed sensor <FL> connector

Q:Is the check result normal?

YES:

 Go to Step 13.

NO:

 Repair the defective connector.

STEP 13. Wiring harness check between A-01 ABS-ECU
connector terminal No. 18/19 and A-11 wheel speed sensor
<FL> connector terminal No. 1/2

｠

Check for open circuit in wheel speed sensor <FL> circuit.

Q:Is the check result normal?

YES:

 Replace the wheel speed sensor.

NO:

 Repair the wiring harness.

STEP 14. 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 C1011 set?

35B-34

ANTI-LOCK BRAKING SYSTEM (ABS)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS