The yaw rate sensor, lateral G sensor, longituginal G sensor are packaged in the IMU(Inertial Measurement Unit).
If the yaw velocity reaches the specific velocity after IMU detects the vehicle's yawing, the ESP(ESC) control is activated.
IMU is installed in SRSCM and it interchanges signals with HECU through extra CAN line which is only used for communication between HECU and the IMU.
If fail flag received from IMU(SRSCM) occurred continuously for more than specific time, a failure is recognized.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
IMU message monitoring | 1. Faulty IMU(SRSCM) | |
Enable Conditions | Case 1 |
•
In case that rolling count received from IMU did not increase in order for more than specific time | |
Case 2 |
•
In case that fail flag received from IMU occurred continuously for more than specific time | ||
Fail Safe |
•
2WD vehicle : Inhibit the ESP(ESC) control and allow the ABS/EBD control, the ESP(ESC) warning lamp is activated
•
4WD vehicle : Inhibit the ABS/ESP(ESC) control and allow the EBD control, the ABS/ESP(ESC) warning lamp is activated | ||
