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Home >> Hyundai >> 2020 >> Sonata SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Abs Diagnosis (Except HEV) (1 Of 2) >> DTC C1209-01: Wheel Speed Sensor Rear-RH Open/Short >> DTC Information And Inspection >> DTC Detecting Condition

DTC Information And Inspection: DTC Detecting Condition

Trouble Shooting Condition Possible Cause
Main action
  • Monitor the wheel speed sensor signal
  1. Open or short circuit of wire harness
  2. Poor connector connection between wheel speed sensor and wire harness
  3. Moisture enters the connector of the wheel speed sensor and the wire harness
  4. Open or short circuit of Wheel speed sensor circuit
  5. Faulty Wheel speed sensor
  6. Faulty ESP (ESC)
Threshold value
  • A failure is detected when the current of wheel speed sensor is out of 4.5 ~ 20 mA longer than 200 milliseconds.
Diagnosis time
  • 200 milliseconds
MIL
  • Only one wheel failure

    : ABS/ESP (ESC) warning lamps are activated. EBD/EPB warning lamp is not activated.

  • Two or more wheels failure

    : ABS/EBD/ESP (ESC)/EPB warning lamps are activated.
Reset condition
  • ESC: Turn ignition switch OFF and back ON.
  • EPB: When three or more wheel speed sensor signals are input normally.
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