C1211 KIA – Wheel Speed Sensor Rear Right Invalid / No Signal

C1211 KIA Possible Symptoms

Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)

C1211 KIA Possible Causes

Improper installation of wheel speed sensor,Abnormal Rotor and wheel bearing,Faulty Wheel Speed Sensor Rear Right,Wheel Speed Sensor Rear Right harness is open or shorted,Wheel Speed Sensor Rear Right circuit poor electrical connection

C1211 KIA Description

The wheel speed sensor is the essential component the ABS ECU uses to calculate vehicle speed and to determine whether wheel lock occurs. For example, rear wheel speed signal is used as a reference value, for vehicle speed, in front wheel drive vehicles, and if a difference between front and rear wheel speed occurs, then ABS control is performed. The wheel speed sensor generates sinewave signals, based on magnetic field made by a permanent magnet in the speed sensor, when the tone wheel rotates. The frequency and AC voltage changes in proportion to the wheel speed, and the HECU determines the speed by calculating the frequency of the signal.