By executing the calibration of the torque sensor, the EPS-ECU learns the neutral position of the torque sensor.
FUNCTION
If torque sensor calibration is not performed, sets this DTC.
TROUBLE JUDGMENT
Check Conditions
Turn the ignition switch to the "ON" position.
Judgment Criterion
When torque sensor calibration is incomplete.
Fail Safe, Back Up Function
The EPS-ECU turns on the electric power steering warning lamp, and sets diagnostic trouble code No.C1518.
Even if torque sensor calibration is not executed, assist is performed, but there may be a difference in assisting force when steering wheel is rotated left and right. This can be solved by correctly completing torque sensor calibration.