| DTC Strategy |
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- Open or short of Wheel speed sensor circuit (FL)
- Faulty Wheel speed sensor (FL)
- Faulty HECU
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| Case1 |
Monitoring Period |
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| Enable Conditions |
- Shorts between WSS lines and shorts to UZ can be detected by switching single WSS channels in sequence. If there is an error after end of test, a failure is recognized.
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| Case2 |
Monitoring Period |
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| Enable Conditions |
- When the sensor current levels are out of permissible range (LOW : 7mA, HIGH : 14mA) for 200ms.
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| Fail Safe |
- Sensor failure outside of the ABS control cycle
- 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.
- 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.
- 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
- 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.
- 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.
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