Power Steering System

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: PRECAUTION

1. IGNITION SWITCH EXPRESSIONS

(a) 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 PRECAUTION

(a) When handling the electronic parts;

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

Do not expose 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 power steering motor, torque sensor and rotation angle sensor. Replace with new ones if dropped or subjected to a severe blow.

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

When the steering column assembly has been replaced, perform the assist map writing Programming and Relearning.

3. 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, CAN communication line DTCs are output.

(b) 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.

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

4. POWER STEERING SYSTEM FUNCTIONS

(a) 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" Data List / Active Test.