Component Location
General Description

The Steering angle sensor(SAS) is joined to the multi function switch and using a CAN communication.

The SAS is composed of main gear, serve gear1 and serve gear2 to determine the turning direction.

If main gear is rotated according to the rotation of steering wheel serve gear1 and serve gear2, which is contact with main gear, will be rotated.

The HECU detects the absolute angle by using magnetic MR effect and the difference gear ratio of each serve gear and then send to the CAN comunication line.

The HECU detects the steering wheel’s operating speed and operating angle by using absolute angle, and this signal is used as a input signal of anti-roll control.

DTC Description

The SAS used for ESP control needs zero point adjustment because the SAS measures a absolute angle.

Zero point adjustment is done by using the scantool device. If abnormal zero point adjustment is detected, a failure is reconized.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

● Signal Monitoring

● A fail of SAS zero point adjustment

● Faulty HECU

Monitoring Period

● During SAS zero point adjustment.

Enable Conditions

● The position of steering wheel is out of specified range (straight positon, a max. error ±5˚) during SAS zero point adjustment.

Fail Safe

● Reduced controller function caused by faulty SAS signal. Allow the ABS/EBD control.

● The ESP warning lamp is activated.

Schematic Diagram
Яндекс.Метрика