Toyota Prius: Steering System

Precaution

PRECAUTION

HANDLING PRECAUTIONS FOR STEERING SYSTEM

(a) Care must be taken when replacing parts. Incorrect replacement may affect the performance of the steering system and result in a driving hazard.

HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM

(a) This Toyota Prius vehicle is equipped with a Supplemental Restraint System (SRS). 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 Supplemental Restraint System.

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HANDLING PRECAUTIONS FOR STEERING COLUMN

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

HANDLING PRECAUTION FOR SPIRAL CABLE

(a) Do not remove/install the spiral cable with sensor sub-assembly with the auxiliary battery connected and the ignition switch ON.

(b) Do not rotate the spiral cable with sensor sub-assembly without the steering wheel assembly installed, with the auxiliary battery connected and the ignition switch ON.

(c) Ensure that the steering wheel assembly is installed and aligned straight when inspecting the steering sensor.

(d) Be sure that the spiral cable is in the center position during installation and when removing and installing the steering wheel.

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CAUTION:

If the steering wheel is turned without the spiral cable installed in the center position, the cable may break.

Adjustment

ADJUSTMENT

PROCEDURE

1. STEERING WHEEL OFF CENTER ADJUSTMENT PROCEDURE

(a) Inspect steering wheel off center.

(1) Turn the steering wheel assembly to the center position.

(2) Apply masking tape to the top center of the steering wheel assembly and upper steering column cover.

*1 Steering Wheel Assembly *2 Upper Steering Column Cover *a Masking Tape

(3) Drive the Toyota Prius vehicle in a straight line for 100 m (328 ft.) at a constant speed of 56 km/h (35 mph), while holding the steering wheel assembly to maintain the course.

(4) Draw a line on the masking tape as shown in the illustration.

*1 Upper Steering Column Cover *2 Steering Wheel Assembly *a Marked Line

(5) Turn the steering wheel assembly to the center position.

(6) Draw a new line on the masking tape on the steering wheel assembly as shown in the illustration.

*1 Upper Steering Column Cover *2 Steering Wheel Assembly *a Marked Line

(7) Measure the distance between the 2 lines on the masking tape on the steering wheel assembly.

(8) Convert the measured distance to the steering angle.

(b) Adjust the steering angle.

(1) Put matchmarks on the tie rod assemblies LH and RH and steering rack end sub-assembly respectively.

*a Matchmark

(2) Using a paper gauge, measure the thread length of the steering rack end sub-assemblies.

(3) Remove the steering rack boot clips from the RH and LH steering rack boots.

(4) Loosen the RH and LH lock nuts.

(5) Turn the RH and LH rack ends by the same amount (but in different directions) according to the steering angle value.

(6) Tighten the RH and LH lock nuts to the specified torque.

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(7) Install the RH and LH steering rack boot clips.