If the difference between the estimated value from the other sensors and the measured value of the IMU message from SRSCM is larger than predefined value for predefined time, the failure is recognized.
Item | Detecting Condition | Possible cause | |
Case1 | DTC Strategy |
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Lateral G sensor signal error monitoring | 1. Faulty IMU(SRSCM) 2. Incorrect installation condition |
Enabl Conditions | 1. During standstill if Lateral G value is larger than 0.7g, and continue 2sec. 2. When the difference between estimated value and measured value of the lateral G sensor is lager than 0.3g (this threshold value can be changed by vehicle dynamic state). 3. When the condition of △Lateral G /0.01sec > 0.3g occurs more than 250 times within 5sec. (this threshold value can be changed by vehicle dynamic state, Stand-still : 0.3G, Vehicle Stable State : 0.8G, Vehicle Unstable State : 1.0G) 4. When the lateral G value is larger than 75deg/s, and continue for 5sec. 5. When self test signal is out of sensor spec when self test is active. - Sensor spec: lateral G signal is larger than 1.5g. | ||
Fail Safe |
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Inhibit the ESP(ESC)/DBC/AVH control and allow the ABS/EBD control. | ||
MIL |
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The ESP(ESC)/DBC warning lamp is activated. The AVH warning lmap is activated in case of the vehicle equipped with AVH. | ||
Reset Condition |
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1~4. Sensor signal is normal on a driving with left/right turn (vehicle speed is above 20km/h) after IG turned On again.
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Sensor signal is normal after IG turned On again | ||
Case2 | DTC Strategy |
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Yaw rate sensor signal error monitoring | |
Enabl Conditions | 1. During standstill if yaw rate value is larger than 6deg/s, and continue for 2sec. 2. When the difference between estimated value and measured value of the yaw rate sensor is lager than 7deg/s(this threshold value can be changed by vehicle dynamic state) over 1.5sec. 3. When the condition of △Yaw/0.01sec > 5deg/s (this threshold value can be changed by vehicle dynamic state) occurs more than 250 times within 5sec. 4. When the yaw rate value is larger than 75deg/s, and continue for 5sec. 5. When self test signal is out of sensor spec when self test is active. - Sensor spec: yaw signal is between 15deg and 35deg. | ||
Fail Safe |
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Inhibit the ESP(ESC)/DBC/AVH control and allow the ABS/EBD control. | ||
MIL |
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The ESP(ESC)/DBC warning lamp is activated. The AVH warning lmap is activated in case of the vehicle equipped with AVH. | ||
Reset Condition |
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1~4. Sensor signal is normal on a driving with left/right turn (vehicle speed is above 20km/h) after IG turned On again.
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5. Sensor signal is normal after IG turned On again | ||
Case3 | DTC Strategy |
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Longitudinal G sensor signal error monitoring | |
Enabl Conditions | 1. During standstill if G sensor value is above 0.7g longer than 1sec. 2. If the absolute value of G sensor is above 0.5g longer than 20sec. when the vehicle speed is above 10km/h and the brake light is off. 3. If the cahnge of G sensor is under 0.05g longer than 20 times when the vehicle speed is changed over 20 during standstill. 4. If the G sensor signal changed over 0.5g more than 80 times for 5sec. 5. When self test signal is out of sensor spec when self test is active. - Sensor spec: Longitudinal G signal is larger than 1.5g. | ||
MIL |
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2WD vehicle: - In case DBC warning lamp exists, DBC/AVH warning lamp are activated. - In case DBC warning lamp not exist, ESP(ESC)/AVH warning lamp are activated.
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4WD vehicle: ABS/ESP(ESC)/DBC/AVH warning lamp are activated. | ||
Reset Condition |
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1~4. Sensor signal is normal on a driving with △g over 0.15g or (2WD vehicle) below conditions are met for more than 3sec after IG turned on again. - Minimum wheel speed is faster than 2km/h - Wheel speeds are between 0.6 X Vmax and 1.4 X Vmin - Delta wheel speed for 10msec is lower than 2km/h (4WD vehicle) minimum wheel speed is faster than 10km/h
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5. Sensor signal is normal after IG turned On again | ||
