The Steering angle sensor(SAS) is installed in MDPS assembly in case of vehicle applied MDPS.
The Steering angle sensor(SAS) is installed upper side of the clock spring of steering wheel in case of vehicle not applied MDPS.
The SAS is used to determine turning direction and speed of the steering wheel.
The HECU uses the signals from the SAS when performing ESP-related calculations.
The HECU monitors the signals of the steering angle sensor and if the abnormal signal is detected or the difference between the angle speed calculated from the other sensors and the the angle speed measured from the steering angle sensor is above a certain value, this DTC is set.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal Monitoring | 1. Incorrect calibration 2. Improper installation of steering angle sensor 3. Faulty steering angle sensor |
Enable Conditions |
•
During straight driving, If the steering wheel angle is larger than 55 degree.
•
When the steering wheel angle is larger than ±780 degrees.
•
When the difference between estimated angle and measured angle of the SAS sensor is lager than 50deg/s, if the fault condition exists uninterrupted for 1.5sec.
•
In case that diagnostic signal fault of SAS was happened for more than 100ms within normal voltage condition. | |
Fail Safe |
•
Inhibit the ESP/DBC control and allow the ABS/EBD control.
•
The ESP/DBC warning lamp is activated. |
