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 later G sensor senses vehicle's lateral G. A small element inside the sensor is attached to a deflectable leverarm by later G.
Direction and magnitude of lateral G loaded to vehicle can be known with electrostatic capacity changing according to lateral G.
It interchanges signals with HECU through extra CAN line which only used for communication between HECU and sensor.
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 & later 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 & later G sensor message was not received for more than 500ms within normal voltage condition. - The Monitoring starts 1s after Power Up. | ||
Case2 | DTC Strategy |
•
Open, short monitoring | |
Enable Conditions |
•
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. | ||
