Mitsubishi Outlander (2013+). Manual - part 443
TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-15
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 C100A, C1015, C1020 or
C102B set?
YES :
Replace the hydraulic unit (integrated with
ABS-ECU) (Refer to
). Then go to
Step 11.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/How to
Cope with Intermittent Malfunctions ).
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 C100A, C1015, C1020 or
C102B set?
YES :
Return to Step 1.
NO :
This diagnosis is complete.
Code No. C1011 FL wheel speed sensor signal
Code No. C101C FR wheel speed sensor signal
Code No. C1027 RL wheel speed sensor signal
Code No. C1032 RR wheel speed sensor signal
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 ).
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 ABS-ECU. ABS-ECU uses
the frequency of the pulse signals to determine
the wheel speed.
DIAGNOSIS CODE 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 diagnosis code.
• Irregular change in the wheel speed sensor sig-
nal
• Wheel speed sensor signal continuously indi-
cates 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 magnetisation pattern for wheel
speed detection encoder
• The number of poles on the magnetic encoder for
wheel speed detection (the number of N-pole and
S-pole) is changed.
Past trouble
• When the diagnosis code No. C100A, C1015,
C1020 or C102B 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 (GROUP 00
−
How to Use Troubleshooting/How to Treat Past
Trouble ).
• When the diagnosis code No. C100A, C1015,
C1020 or C102B is not set, the following condi-
tions may be present:
• Some wheels slip
• Unstable vehicle attitude
• External noise interference
• Vehicle ran with the parking brake applied.