Inspection Procedure

Check if the steering angle sensor is properly installed. Is the installing proper?

NO 

• Reinstall the steering angle sensor properly.

YES 

• Check power of steering angle sensor

Disconnect the steering angle sensor connector, and measure the voltage between terminal 2 and 3 of the steering angle sensor connector.

Specification: 9~16 V

Is the voltage within the specification?

NO 

• Check harness and connector between the HECU and the steering angle sensor.

YES 

• Check output signal of steering angle sensor

1. Check if both ST1 and ST2 alternate High and Low signal, rotating the wheel.
2. Check if STN has Low signal, rotating the wheel at 360 degree in one direction. Is the signal of the steering angle sensor normal?

   NO 

   • Check harness and connector of the steering angle sensor. If no error on the harness and the connector, replace the steering angle sensor and recheck.

   YES 

   • After clearing the DTC and driving the vehicle at 40Km/h speed or more, if the ESC lamp is ON and the same DTC shows again, replace the HECU and recheck.