DTC C0210/33: Rear Speed Sensor RH Circuit; DTC C0215/34: Rear Speed Sensor LH Circuit; DTC C1273/73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274/74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC): Description

The speed sensors detect wheel speed and transmit the signals to the ECU. These signals are used for control of the ABS control system. Each of the front and rear rotors have 48 serrations.

When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor induces an AC voltage.

Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.

DTCs C1273/73 and C1274/74 can be deleted when the speed sensor sends a wheel speed signal or the Test Mode ends. DTCs C1273/73 and C1274/74 are output only in the Test Mode.

Fig 1: View Of Speed Sensor And Output Voltage Signals Graph

DTC Code	DTC Detection Condition	Trouble Area
C0210/33 C0215/34	When any of the following is detected: At a vehicle speed of 10 km/h (6 mph) or more, an open or short in the sensor signal circuit continues for 1 second or more. Momentary interruption of the sensor signal from the abnormal wheel occurs 7 times or more. An open in the speed sensor signal circuit continues for 0.5 seconds or more.	Rear speed sensor RH/LH Speed sensor circuit Speed sensor rotor Sensor installation Brake actuator assembly (Skid control ECU)
C1273/73 C1274/74	Detected only during Test Mode.	Rear speed sensor RH/LH Sensor installation Speed sensor rotor

HINT:

DTCs C0210/33 and C1273/73 are for the rear speed sensor RH.
DTCs C0215/34 and C1274/74 are for the rear speed sensor LH.