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STEERING WHEEL SENSOR CALIBRATION


<Vehicles without TC-SST>
caution After the next operation has been completed, carry out the following two operations:

  • Alignment adjustment <Front>
  • Steering wheel sensor (column switch assembly) replacement, removal, installation
  • ASC-ECU replacement

  1. Update the neutral position stored in the steering wheel sensor.
  2. Reset the calibrated value of the steering angle stored in ASC-ECU.
caution
  • Before performing the calibration, check if the steering wheel sensor-related diagnostic trouble code is set in ASC-ECU.
  • When the diagnostic trouble code other than C121A is set, carry out inspection according to each troubleshooting procedure.
1.Place the vehicle on a level surface with its road wheels in the straight ahead position.
2.
caution Before connecting or disconnecting the scan tool, turn the ignition switch to the "LOCK" (OFF) position.
Set the scan tool with the ignition at "LOCK" (OFF).
3.Ignition switch: ON
4.Select the relevant system from the menu.
5.Select "Steering angle sensor" from the system list in "System select", and press "OK" button.
6.Select "Special function" under "Steering angle sensor".
7.Select "SAS Calibration" under "Special function".
note If the steering angle sensor neutral point has been learned, the display will show "If SAS needs re-calibration, execute SAS calibration after executing SAS initialization". If yes, press "OK" button.
8.As "SAS initialization" is selected under "SAS Calibration", press "OK" button.
note At this time, if the steering angle sensor neutral point has been learned, the display will show "Do you want to start? Note This operation will dear DTCs". Then, press "OK" button.
9.The display should show "Completed." Press "OK" button.
10.Press the OK button.
11.The display should show "SAS Calibration: Do you want to start?". Then press the OK button.
note Please execute after making a tire and a steering wheel straight.
12.The display should show "Completed." Press "OK" button.
13.Turn the ignition switch to "LOCK" (off) position, and then turn the ignition switch ON again.
14.Select the relevant system from the menu.
15.Select "ABS/ASC/ASTC/WSS" from the system list under "System select", and press "OK" button.
16. Select "Special function" under "ABS/ASC/ASTC/WSS".
17.Select "Sensor calibration" under "Special function".
18.Select "SAS calibration" under "Sensor calibration", and press "OK" button.
19.The screen displays "SAS calibration: The selected command will be executed. Are you sure? Caution: Confirm the execution conditions." Then press "OK" button.
20."Executed: The command was executed." will be shown. Then press "OK" button.
21.Select "Diagnostic trouble code" under "ABS/ASC/ASTC/WSS". If the diagnostic trouble code "C2205 SAS internal failure (past trouble)" is set, clear it.
22.Learning neutral point complete
23.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.

<Vehicles with TC-SST>
caution After the next operation has been completed, carry out the following two operations:

  • Alignment adjustment <Front>
  • Steering wheel sensor (column switch assembly) replacement, removal, installation
  • ASC-ECU replacement

  1. Update the neutral position stored in the steering wheel sensor.
  2. Reset the calibrated value of the steering angle stored in ASC-ECU.
  3. Reset the calibrated value of the steering angle stored in AWC-ECU <Only when the steering wheel sensor (column switch assembly) is replaced, removed, or installed>
caution
  • Before performing the calibration, check if the steering wheel sensor-related diagnostic trouble code is set in ASC-ECU.
  • When the diagnostic trouble code other than C121A is set, carry out inspection according to each troubleshooting procedure.

<When the ASC-ECU is replaced>
1.Place the vehicle on a level surface with its road wheels in the straight ahead position.
2.
caution Before connecting or disconnecting the scan tool, turn the ignition switch to the "LOCK" (OFF) position.
Set the scan tool with the ignition at "LOCK" (OFF).
3.Ignition switch: ON
4.Select the relevant system from the menu.
5.Select "Steering angle sensor" from the system list in "System select", and press "OK" button.
6.Select "Special function" under "Steering angle sensor".
7.Select "SAS Calibration" under "Special function".
note If the steering angle sensor neutral point has been learned, the display will show "If SAS needs re-calibration, execute SAS calibration after executing SAS initialization". If yes, press "OK" button.
8.As "SAS initialization" is selected under "SAS Calibration", press "OK" button.
note At this time, if the steering angle sensor neutral point has been learned, the display will show "Do you want to start? Note This operation will dear DTCs". Then, press "OK" button.
9.The display should show "Completed." Press "OK" button.
10.Press the OK button.
11.The display should show "SAS Calibration: Do you want to start?". Then press the OK button.
note Please execute after making a tire and a steering wheel straight.
12.The display should show "Completed." Press "OK" button.
13.Turn the ignition switch to "LOCK" (off) position, and then turn the ignition switch ON again.
14.Select the relevant system from the menu.
15.Select "ABS/ASC/ASTC/WSS" from the system list under "System select", and press "OK" button.
16. Select "Special function" under "ABS/ASC/ASTC/WSS".
17.Select "Sensor calibration" under "Special function".
18.Select "SAS calibration" under "Sensor calibration", and press "OK" button.
19.The screen displays "SAS calibration: The selected command will be executed. Are you sure? Caution: Confirm the execution conditions." Then press "OK" button.
20."Executed: The command was executed." will be shown. Then press "OK" button.
21.Select "Diagnostic trouble code" under "ABS/ASC/ASTC/WSS". If the diagnostic trouble code "C2205 SAS internal failure (past trouble)" is set, clear it.
22.Learning neutral point complete
23.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.

<When the steering wheel sensor is replaced>
1.Carry out steps 1 to 21 of the steering wheel sensor calibration for when the ASC-ECU is replaced.
2.Select the relevant system from the menu.
3.Select "ACD/AYC" from the system list in "System select", and press "OK" button.
4.Select "Special function" under "ACD/AYC".
5.Select "Sensor calibration" under "Special function".
note If the steering angle sensor neutral point has been learned, the display will show "If SAS needs re-calibration, execute SAS calibration after executing SAS initialization". If yes, press "OK" button.
6.As "SAS Calibration" is selected under "Sensor calibration", press "OK" button.
note At this time, if the steering angle sensor neutral point has been learned, the display will show "Do you want to start? Note This operation will dear DTCs". Then, press "OK" button.
7.The display should show "Completed." Press "OK" button.
8.Press the OK button.
9.The display should show "SAS Calibration: Do you want to start?". Then press the OK button.
note Please execute after making a tire and a steering wheel straight.
10.The display should show "Completed." Press "OK" button.
11.Turn the ignition switch to "LOCK" (off) position, and then turn the ignition switch ON again.
12.Select the relevant system from the menu.
13.Select "ACD/AYC" from the system list under "System select", and press "OK" button.
14. Select "Special function" under "ACD/AYC".
15.Select "Sensor calibration" under "Special function".
16.Select "SAS calibration" under "Sensor calibration", and press "OK" button.
17.The screen displays "SAS calibration: The selected command will be executed. Are you sure? Caution: Confirm the execution conditions." Then press "OK" button.
18."Executed: The command was executed." will be shown. Then press "OK" button.
19.Select "Diagnostic trouble code" under "ACD/AYC". If the diagnostic trouble code "U1428 G and Yaw Rate Sensor Data Error (past trouble)" is set, clear it.
20.Learning neutral point complete
21.Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.