Component Location
General DESPription
When the vehicle is turning, the yaw rate sensor detects the yaw rate electronically by the vibration change of plate fork inside the yaw rate sensor. If the yaw velocity reaches the specific velocity after it detects the vehicle's yawing, the ESP control is reactivated. The lateral G sensor senses the vehicle's lateral acceleration. A small element inside the sensor is attached to a deflectable leverarm by lateral acceleration. Direction and magnitude of lateral acceleration loaded to vehicle can be known by electrostatic capacity changing according to lateral acceleration. It interchanges signals with HECU through extra CAN line which is only used for communication between HECU and the sensor. In case of the vehicle with 4WD & ESP, G sensor is packaged with yaw rate & later G sensor.
DTC Description
If the difference between the estimated value from the other sensors and the measured value from the yaw rate and lateral G sensor is larger than predefined value for predefined time, the failure is recognized.
DTC Detecting Condition
Item | Detecting Condition | Possible cause |
DTC Strategy | Signal monitoring
| Faulty Yaw Rate sensor Improper installation condition |
Case1 | Enable Conditions | When the difference between estimated value and measured value of the yaw rate sensor or later G sensor is lager than Predefined value for specific time , ECU detects failure During standstill if Lateral G value is larger than 0.7g, and continue 2sec. During standstill if yaw rate value is larger than 6deg/s, and continue for 2sec. ECU compares the variation of wheel speed with the variation of G. If ECU detects G-Sensor signal stick, failure is detected. (4WD only) When velocity > 10kph(6.2mph) and the brake light switch is OFF, |G| > 0.5G for 20sec continuously (4WD only)
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Case2 | Enable Conditions | When the difference between estimated value and measured value of the lateral G sensor is lager than Predefined value for specific time , ECU detects failure.
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Case3 | Enable Conditions | Yaw signal is smaller than predefined value when CBIT is transmitted Lateral G signal is smaller than defined value when CBIT is transmitted. ? CBIT : Commanded Built In Test
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Case4 | Enable Conditions | In case that Yaw&Lateral G Sensor Fail Flag is detected for defined time
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Fail Safe | Inhibit the ESP/HAC control and allow the ABS/EBD control The ESP warning lamp is activated
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Diagnostic Circuit Diagram