TROUBLESHOOTING
ANTI-SKID BRAKING SYSTEM (ABS)
35B-23
Code No.C1201: Front Right Wheel Speed Sensor
Code No.C1206: Front Left wheel Speed Sensor
Code No.C1211: Rear Right wheel Speed Sensor
Code No.C1216: Rear Left wheel Speed Sensor
CAUTION
If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Diagnose
the CAN bus lines before the Diagnosis codes
(Refer to GROUP 54D, CAN bus-line diagnostic
flow
P.54D-9
).
OPERATION
• Wheel speed sensor is a kind of a pulse
alternator. It consists of encoders (a plate on
which north and south pole sides of the magnets
are arranged alternately) for detecting wheel
speed which rotates at the same speed of the
wheels and wheel speed sensors. This sensor
outputs frequency pulse signals in proportion to
wheel speed.
• The wheel speed sensors transmit the frequency
of the voltage pulses and the amount of voltage
generated by each pulse to the ABS-ECU.
(FRONT: LH)
(FRONT: RH)
(REAR: LH)
(REAR: RH)
WHEEL SPEED SENSOR
ABS-ECU
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
Wheel Speed Sensor Circuit