Power Steering System
POWER STEERING: POWER STEERING SYSTEM: CALIBRATION
1. ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION
NOTICE:
Clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point if any of the following has occurred:
* The power steering ECU has been replaced.
* The power steering link assembly has been replaced.
* Steering effort differs between turning the steering wheel to the left and right.
(a) Inspection before calibration
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch ON (IG).
(3) Turn the Techstream on.
(4) Check the IG power supply voltage on the Techstream. Enter the following menus: Chassis / EMPS / Data List.
Standard Voltage:
10 to 14 V
NOTICE:
If the IG power supply voltage is 9 V or less, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.
(b) Rotation angle sensor calibration value clear, rotation angle sensor initialization, and torque sensor zero point calibration
NOTICE:
* 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.
* If DTC C1526 (Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor cannot be initialized. Clear the DTC before starting initialization.
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch ON (IG).
(3) Turn the Techstream on.
(4) Follow the procedures on the Techstream display to clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point. Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.
NOTICE:
* When initializing the rotation angle sensor, observe the following to stabilize sensor voltage:
* After turning the power switch ON (IG), wait for at least 2.5 seconds before turning the steering wheel. Do not turn the steering wheel quickly.
* The steering wheel will vibrate during torque sensor zero point calibration. Do not touch the steering wheel while it is vibrating or for 2 seconds after it stops.