Power Steering System

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2AZ-FE): PRECAUTION

1. IGNITION SWITCH EXPRESSIONS

HINT
The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.





2. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM

(a) The vehicle is equipped with an SRS (Supplemental Restraint System). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident.

Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for the Supplemental Restraint System Service Precautions.

3. PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC MOTOR POWER STEERING COMPONENTS

(a) Be sure to align the front wheels straight ahead when removing and installing the power steering gear assembly.

(b) If disconnecting the steering sliding yoke sub-assembly and the pinion shaft of the power steering gear assembly, be sure to place matchmarks before starting the operation.

(c) After replacing the power steering gear assembly or power steering ECU, clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point Programming and Relearning.

4. HANDLING PRECAUTION

(a) When handling the electronic parts:

* Avoid any impact to electronic parts such as ECUs and relays. Replace them with new ones if dropped or subjected to a severe blow.

* Do not expose any electronic parts to high temperatures or humidity.

* Do not touch the connector terminals in order to prevent deformation or malfunctions due to static electricity.

(b) When handling the steering column assembly:

* Avoid any impact to the steering column assembly, especially to the motor and torque sensor. Replace them with new ones if dropped or subjected to a severe blow.

* Do not pull the wire harness when moving the steering column assembly.

(c) When disconnecting and reconnecting the connectors:

When disconnecting the connectors related to the power steering system, turn the ignition switch on (IG), center the steering wheel, turn the ignition switch off, and then disconnect the connectors.

5. PRECAUTIONS FOR CAN COMMUNICATION

(a) CAN communication lines are used to receive information from the skid control 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.

(b) Perform troubleshooting for the communication line problems when the CAN communication DTCs are output. Be sure to start troubleshooting on the power steering system after confirming that the CAN communication system is normal.

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