Power Steering System: Calibration: Calibration

TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM)

NOTE:

Perform the torque sensor zero point calibration if any of the following conditions occur:

The steering column assembly (containing the torque sensor) has been replaced.
The power steering ECU has been replaced.
There is a difference in steering effort between turning right and left.

HINT:

When torque sensor zero point calibration is performed, the assist map is written automatically at the same time.

Perform the torque sensor zero point calibration.

NOTE:

If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTC before starting calibration.

Set the steering wheel to the center point and align the front wheels straight ahead.
Turn the ignition switch off.
Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Calibrate the power steering ECU. Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.
NOTE:
- Do not touch the steering wheel during the torque sensor zero point calibration.
- Perform the calibration only when the vehicle is stopped.

Check for DTCs. Refer to DTC CHECK / CLEAR .

NOTE:

After zero point calibration is completed normally, confirm that DTC is not output.

If DTC C1515, C1516, C1534 or C1581 is output, perform troubleshooting for the corresponding DTC.

Result

Result	See Procedure
DTC C1515 is output.	Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone
DTC C1516 is output.	Refer to DTC C1516: Torque Sensor Zero Point Adjustment Incomplete
DTC C1534 is output.	Refer to DTC C1531: ECU Malfunction; DTC C1532: ECU Malfunction; DTC C1533: ECU Malfunction; DTC C1534: ECU Malfunction; DTC C1535: ECU Malfunction
DTC C1581 is output.	Refer to DTC C1581: Assist Map Number Un-Writing

ASSIST MAP WRITING (USING TECHSTREAM)
HINT:

If DTC C1581 is output after torque sensor zero point calibration, perform assist map writing.
1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Turn the Techstream on.
5. Enter the following menus: Chassis / EMPS / Utility / Signal Check.
  HINT:
  - Follow the instructions on the Techstream to perform Signal Check.
  - With DTC C1581 output, performing Signal Check will cause the power steering ECU to enter Test Mode and the assist map will be written automatically.
6. Check for DTCs. Refer to DTC CHECK / CLEAR .
  HINT:
  
  After writing the assist map, if DTC C1581 is output, perform the troubleshooting procedure for DTC C1581. Refer to DTC C1581: Assist Map Number Un-Writing .