POWER STEERING SYSTEM (for Sedan) > PRECAUTION



1.HANDLING PRECAUTION
  1. When handling the electronic parts;

    1. Avoid any impact to parts such as ECUs and relays. Replace with new ones if dropped or subjected to a severe blow.
    2. Do not expose to high temperatures or humidity.
    3. Do not touch the connector terminals, in order to prevent deformation or malfunctions due to static electricity.
    4. When the power steering ECU has been replaced with a new one, perform the torque sensor zero point calibration (Click here).
  2. When handling the steering column assembly;

    1. Avoid any impact to the steering column assembly, especially to the motor and torque sensor. Replace with new ones if dropped or subjected to a severe blow.
    2. Do not pull the wire harness when moving the steering column assembly.
    3. When the steering column assembly has been replaced, perform the torque sensor zero point calibration after initializing the torque sensor zero point (Click here).
  3. When disconnecting and reconnecting the connectors;

    1. When disconnecting the connectors related to the electronic power steering system, turn the ignition switch on, center the steering wheel, turn the ignition switch off, and then disconnect the connectors.
    2. When reconnecting the connectors related to the electronic power steering system, ensure that the ignition switch is off. Center the steering wheel and then turn the ignition switch on.

      NOTICE:
      Do not turn the ignition switch on when the steering wheel is not centered.
    3. If the above operations are not carried out properly, the steering center point (zero point) will deviate, which may lead to a difference in steering effort between turning right and left. If there is a difference in steering effort between turning right and left, perform the torque sensor zero point calibration (Click here).

2.PRECAUTIONS FOR CAN COMMUNICATION
  1. CAN communication lines are used to receive information from the skid control ECU (ABS ECU) and the ECM, and to transmit warnings to the combination meter. When there are any problems in the CAN communication lines, DTCs of the CAN communication line are output.

  2. Perform troubleshooting of the communication line problems when the CAN communication DTCs are output. Be sure to start troubleshooting on the electronic power steering system after confirming that the CAN communication system is normal.

  3. Since the CAN communication line has its own length and route, it cannot be repaired temporarily with the bypass wire, etc.


3.POWER STEERING SYSTEM FUNCTIONS
C193950E01
  1. If the battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist may be reduced and the EPS warning light may come on. In such cases, the amount of power assist returns to normal when the battery voltage recovers.

    HINT:
    If the EPS warning light comes on but no DTCs are stored, check the Data List "Battery Voltage Lo Record" (Click here).