Steering Wheel Sensor Calibration: Notes

CAUTION: After the next operation has been completed, carry out the following two operations:

Update the neutral position stored in the steering wheel sensor.
Reset the calibrated value of the steering angle stored in ASC-ECU.
- Alignment adjustment <Front>
- Steering wheel sensor (column switch assembly) replacement, removal, installation
- ASC-ECU replacement

CAUTION:

Before performing the calibration, check if the steering wheel sensor-related diagnostic trouble code is set in ASC-ECU.
When the DTC other than C121A is set, carry out inspection according to each troubleshooting procedure.

Park the vehicle on a level surface with tires and steering wheel positioned in a straight ahead direction.
CAUTION: Before connecting or disconnecting the scan tool (M.U.T.-IIISE), turn off the power supply mode of the electric motor switch.
Before setting scan tool (M.U.T.-IIISE), turn off the power supply mode of the electric motor switch.
Turn on the power supply mode of the electric motor switch.
Select "Steering angle sensor."
Select "Special function."
Select "SAS Calibration."
Select and run "SAS Initialization." (Reusable parts only)
NOTE:
- Since the neutral position stored in the steering wheel sensor is no longer available, "SAS Initialization" is displayed.
- Since a new steering wheel sensor has no neutral position, "SAS Calibration" is displayed.
Select and run "SAS Calibration."
Exit "Steering angle sensor" menu, and then select "ABS/ASC/ASTC/WSS."
Select "Special function."
Select "Sensor calibration."
Select and run "SAS calibration."
Check whether the ASC-ECU-related diagnostic trouble code is set.
Erase the diagnostic trouble code.
NOTE: Erase the DTC C121A.
Before removing scan tool (M.U.T.-IIISE) from the vehicle, turn off the power supply mode of the electric motor switch.