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Home >> Kia >> 2009 >> Sorento Base, A5SR2 >> Repair and Diagnosis >> Brakes >> Traction Control >> Esp (Electronic Stability Program) >> DTC Troubleshooting >> DTC C1201: Wheel Speed Sensor Front-LH Range / Performance / Intermittent >> DTC Detecting Condition

DTC C1201: Wheel Speed Sensor Front-LH Range / Performance / Intermittent: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible cause
DTC Strategy
  • Signal monitoring
  • Improper installation of wheel speed sensor
  • Abnormal Rotor and wheel bearing
  • Inoperative Wheel speed sensor
  • External noise
Case 1 Monitoring Period
  • The monitoring is active from 10 km/h to 80 km/h (6.2 mph to 49.7 mph) and if no ABS-control is active at a front wheel and a rear wheel.
Enable Conditions
  • Every time, if a gap in the wheel speed sensor signal occurs cyclically with one wheel rotation, a fault counter is increased by one. If the fault counter exceeds its limit of 6, a wheel specific fault is stored in the EEPROM.
Case 2 Monitoring Period
  • Continuous
Enable Conditions
  • If following interference and signal disturbance is detected, a failure is set after 10 s.
non-plausible high frequency received.non-plausible high wheel acceleration.non-plausible high wheel jerk.non-plausible delta T and edges at low speed.
Fail Safe
  • Sensor failure outside of the ABS control cycle
    1. Only one wheel failure: Only the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
    2. Two wheels failure: Only the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
    3. More than 3 wheels failure: System down. The ABS/EBD/ESC functions are inhibited. The ABS/EBD/ESC warning lamps are activated.
  • Sensor failure inside the ABS control cycle
    1. One front wheel failure: Inhibit the ABS/ESC control. Pressure is increased on a front wheel, Pressure is decreased on a rear wheel. After the ABS/ESC control, the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
    2. Two wheels failure: Inhibit the ABS/ESC control. Pressure is increased on a front wheel, Pressure is decreased on a rear wheel. After the ABS/ESC control, the ABS/ESC functions are inhibited. The ABS/ESC warning lamps are activated and the EBD warning lamp is not activated.
    3. More than 3 wheels failure: System down. The ABS/EBD/ESC functions are inhibited. The ABS/EBD/ESC warning lamps are activated.
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