General Information

ESP (CTC)
C1260 Steering Angle Sensor Circuit-Signal - General Information

Component Location





General Description

The Steering Angle Sensor (SAS) uses two sensors (A-sensor and B-sensor) to determine the direction of the rotation of the wheel. The main component of each sensor is LED, photo transistor and slit plate.
The slit plate, which has 45 holes, is installed between LED and photo transistor, and generates signals if the slit plate rotates according to the steering wheel rotation. The steering angle sensor's signals are generated by photo transistor which is driven whenever the light passes through the holes. The HECU receives the steering signals from steering angle sensor by CAN communication and detects the operating speed and the direction of the steering wheel.

DTC Description

The HECU monitors the signal of the steering angle sensor for a normal operation and if it is detected that there is an error in the sensor's status, this DTC is set.

DTC Detecting Condition





**In a case that the vehicle goes more than a certain distance after the incorrect steering angle sensor's calibration done, this DTC may be set.

Diagnostic Circuit Diagram