If abnormal sensor air-gap is detected during vehicle speed of 2 km/h(Approx. 1 mph) ~ 10 km/h(Approx. 6 mph), HECU sets DTC C1211.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
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Current Monitoring | 1. Faulty Installation of Rear RH Wheel Speed Sensor 2. Defected Rear RH Rotor and Wheel Bearing 3. Defected Rear RH Wheel Speed Sensor | |
Threshold Value | Case 1 (Large Air-Gap) |
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Wheel acceleration is less than 0.4g and Rear RH wheel speed sensor velocity is below 2 km/h(Approx. 1 mph) and the other three wheel speed sensor velocity is equally over 10 km/h(Approx. 6 mph) for more than 154 msec.
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Wheel acceleration is less than 0.4g and more than two wheel speed sensor velocity is below 2 km/h(Approx. 1 mph) and the other two wheel speed sensor velocity is over 10 km/h(Approx. 6 mph) for more than 20 sec.
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Failure detection time is over 2 minutes when wheel acceleration is over 0.4g from above condition
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After all four wheel speed sensors velocity exceed 10 km/h(Approx. 6 mph), one or two wheel speed sensor velocity is below 2 km/h(Approx. 1 mph) and rest of wheel speed sensor velocity is equally over 10 km/h(Approx. 6 mph) for more than 12 sec. ※ 0.4g : Approx. 3.89 m/s2 | |
Case 2 (long term ABS mode) |
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If wheel speed sensor velocity is below 2 km/h(Approx. 1 mph) for 12 sec during ABS control
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If abnormal ABS control continues for 36 sec. HECU recognizes all four wheels as failure | ||
Fail Safe |
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In case of failure on one wheel - ABS inhibited (ABS Only) - ABS/CBC/TCS/ESC(ESP)/DBC/HAC/VSM/AVH inhibited(ESC[ESP]Only)
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In case of failure on more than two wheels - EBD/ABS inhibited (ABS Only) - EBD/ABS/CBC/TCS/ESC(ESP)/DBC/HAC/VSM/AVH inhibited (ESC[ESP] Only) | ||
Warning Indicator Lamp Status |
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In case of failure on one wheel - ABS/ESC(ESP) Warning Indicator Lamp "ON"
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In case of failure on more than two wheels - EBD/ABS/ESC(ESP) Warning Indicator Lamp "ON" | ||
Clear Condition |
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Ignition "OFF" and then "ON" and Vehicle speed over 10 km/h (Approx. 6 mph) | ||
