Toyota Celica 2005 Repair Manual page 1049

DI−848
CIRCUIT INSPECTION
DTC
C0200/31 to C1239/39
CIRCUIT DESCRIPTION
Speed Sensor
Rotor
Coil
High Speed
+V
−V
BR3583
BR3582
DTC No.
Detection of any of conditions from 1. through 3.:
C0200/31
1. Vehicle speed is at 10 km/h (6 mph) or more and the
C0205/32
speed sensor signal circuit is open or short circuit con-
tinues for 15 sec. or more.
2. Momentary interruption of the speed sensor signal oc-
C0210/33
curs 7 times or more.
C0215/34
3. Open circuit condition of the speed sensor signal circuit
continues for 0.5 sec. or more.
C1235/35
Vehicle speed is at 20 km/h (12mph) or more and interfer-
C1236/36
ence on the speed sensor signal continues for 5 sec. or
C1238/38
more.
C1239/39
HINT:
DTC No. C0200/31 and C1235/35 is for the right front speed sensor.
S
DTC No. C0205/32 and C1236/36 is for the left front speed sensor.
S
DTC No. C0210/33 and C1238/38 is for the right rear speed sensor.
S
DTC No. C0215/34 and C1239/39 is for the left rear speed sensor.
S
2005 CELICA (RM1131U)
DIAGNOSTICS
Magnet
S
N
To ECU
Low Speed
F00010
DTC Detecting Condition
− ANTI−LOCK BRAKE SYSTEM WITH ELECTRONIC
BRAKE FORCE DISTRIBUTION (EBD)
Speed Sensor Circuit
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS system. The front and the rear rotors each have 48
serrations.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
S Right front or left front speed sensor
S Each speed sensor circuit
S Speed sensor rotor
S Right rear and left rear speed sensor
S Each speed sensor circuit
S Speed sensor rotor
S Rear axle hub
S Right front, left front, right rear or left rear speed sensor
S Each speed sensor circuit
S Speed sensor rotor
1048
Trouble Area
DI6SL−09