The Steering angle sensor(SAS) is installed in MDPS assembly.
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 SAS used for ESP control needs 0 set because the SAS measures an absolute angle.
0 set is done by using the scantool device. If abnormal 0 set is detected or no information in SAS is detected, a failure is recognized.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Signal Monitoring | 1. A fail of SAS 0 set |
Monitoring Period |
•
During SAS 0 set. | |
Enable Conditions |
•
The position of steering wheel is out of specified range (straight positon, a max. error ±5˚) during SAS 0 setting.
•
When SAS is not calibrated. | |
Fail Safe |
•
Inhibit the ESP control and allow the ABS/EBD control.
•
The ESP warning lamps are activated. |
