The yaw rate sensor, lateral G sensor, longituginal G sensor are packaged in IMU(Inertial Measurement Unit).
The 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.
This longitudinal G sensor detects vertical acceleration of the vehicle, while the lateral G sensor detects lateral acceleration of the vehicle. The HECU uses thses signals for the HAC(Hill start Assist Control) function and DBC(Down hill Brake Control) function.
If abnormal zero-setting is detected or no information in the HECU is detected, a failure is recognized.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal Monitoring | 1. Uncalibrated longitudinal G sensor |
Enable Conditions |
•
If the calculated offset value of G-sensor was not saved in EEPROM
•
If HECU detects sensor replacement | |
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 |
