Page 154 - Workshop Manual - Tunland (2017)

04-16 DIAGNOSTICS - ANTI-LOCK BRAKING SYSTEM (ABS)

C0038– LEFT REAR WHEEL SPEED SENSOR CIRCUIT FAILURE:

OPEN CIRCUIT OR SHORT CIRCUIT
C0037– LEFT REAR WHEEL SPEED SENSOR FAILURE:THE

SCOPE, PERFORMANCE, CONTINUITY

04 C003B– RIGHT REAR WHEEL SPEED SENSOR CIRCUIT
FAILURE: OPEN CIRCUIT OR SHORT CIRCUIT

C003A–RIGHT REAR WHEEL SPEED SENSOR FAILURE:THE
SCOPE, PERFORMANCE, CONTINUITY

Speed sensor detects wheel speed and transmits
speed signal to the ABS module. ABS system uses
these signals to control each actuator.

When the signal wheel rotates, its wire will intersect
with the magnetic line of force of the magnet in the
speed sensor, therefore, an alternate current voltage
(AC) is produced. Because the voltage frequency
of the AC voltage is proportional to the rotational
speed of signal wheel, the speed of the wheel can
be detected.

Diagnostic Logic

DTC code DTC inspection conditions Trouble location

• If the vehicle speed is not
lower than 20km/h, no
signal will be input to the
ABS module within 15 • Right rear, left rear wheel
C003A seconds. speed sensor

C003B • When the ignition switch is • Right rear, left rear wheel
C0037 changed from OFF position speed sensor circuit
C0038 to ON position, the wheel • Right rear, left rear sensor
speed sensor signal will be signal wheel
interrupted momentarily.
• Wheel speed sensor circuit
is open