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

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system.

Speed sensor rotors have rows of alternating N and S magnetic poles (for 2WD) or 48 serrations (for 4WD). The hall IC type speed sensor use the frequency of output pulses to detect the vehicle speed. Because the sensor outputs digital pulses, it can detect vehicle speeds even when the vehicle is nearly stationary.

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

Fig 1: Rear Speed Sensor Operation Diagram With Output Pulse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DTC Code	DTC Detection Condition	Trouble Area
C0210/33 C0215/34	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 interruptions of the sensor signal from the abnormal wheel occurs 255 times or more. An open in the speed sensor signal circuit continues for 0.5 seconds or more. With the IG1 terminal voltage 9.5 V or more, the sensor power supply voltage decreases 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.