Steering System

STEERING COLUMN: STEERING SYSTEM: 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. HANDLING PRECAUTIONS FOR STEERING COLUMN

(a) When handling the steering column assembly:

(1) Avoid any impacts to the steering column assembly, especially to the motor or the torque sensor. Replace the steering column assembly with a new one if it is dropped or subjected to any severe impacts.

(2) Do not pull on any wire harness when moving the steering column assembly.

(3) After replacing the steering column assembly or power steering ECU assembly, calibrate torque sensor zero point Programming and Relearning for 2AZ-FE, Programming and Relearning for 2ZR-FE).

(4) Do not release the tilt lever when the steering column assembly is not installed on the vehicle.

(b) When disconnecting or reconnecting the connectors:

(1) When disconnecting the connectors related to the electric motor power steering system, turn the ignition switch to ON (the engine is stopped), center the steering wheel, turn the ignition switch off, and then disconnect the connectors.

(2) When reconnecting the connectors related to the electric motor power steering system, make sure that the ignition switch is turned off, center the steering wheel and then turn the ignition switch to ON (the engine is stopped).

NOTICE:
Do not turn the ignition switch to ON without the steering wheel centered.

(3) If the above operations are not carried out correctly, the steering center point (zero point) will deviate, causing a difference in steering effort between right and left turns. If there is a difference in the steering effort between right and left turns, perform the torque sensor zero point calibration Programming and Relearning for 2AZ-FE, Programming and Relearning for 2ZR-FE).