When the vehicle is turning with respect to a vertical axis, the yaw rate sensor detects the yaw rate electroniclly by the vibration change of plate fork inside the yaw rate sensor.
If yaw velocity reaches the specific velocity after it detects the vehicle' yawing, the ESP control is reactivated.
The lateral G sensor senses vehicle's lateral G. A small element inside the sensor is attached to a deflectable leverarm by lateral G.
Direction and magnitude of lateral G loaded to vehicle can be known with electrostatic capacity changing according to lateral G.
A failure is detected if the Yaw rate & later G sensor message was not received or HECU detects sensor CAN Bus off state for more than the specified failure detection time.
The Monitoring starts 1sec after Power Up.
Item
Detecting Condition
Possible cause
Case1
DTC
Strategy
Yaw rate & lateral G sensor message monitoring
Faulty Yaw Rate & Lateral G sensor
Open or short of Yaw Rate & Lateral G sensor
Enable
Conditions
In case that Yaw rate & lateral G sensor message was not received for more than 500ms within normal voltage condition.
- The Monitoring starts 1s after Power Up.
Case2
Open, short monitoring
In case sensor CAN BUS off state continued for more than 100ms.
Fail Safe
Inhibit the ESP control and allow the ABS/EBD control.
The ESP warning lamp is activated.