Toyota Yaris: Steering Column / 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 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 vehicle.

HANDLING PRECAUTION FOR SPIRAL CABLE

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

(b) Do not rotate the spiral cable 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 sub-assembly is in the center position during installation and when removing and installing the steering wheel assembly.

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CAUTION:

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

PRECAUTION WHEN REPLACING STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY

Before replacing the steering lock actuator or upper bracket assembly, refer to Registration.

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On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT STEERING WHEEL FREE PLAY

(a) Start the engine and make sure that the vehicle is in a state in which the power steering can operate.

(b) Stop the vehicle and align the front wheels facing straight ahead.

(c) Gently turn the steering wheel assembly right and left, and check for steering wheel assembly free play.

Maximum Free Play:

30 mm (1.18 in.)

Adjustment

ADJUSTMENT

PROCEDURE

1. ADJUST STEERING CENTER

HINT:

This is the adjustment procedure for when the steering is off center.

(a) Check if the steering wheel assembly is off center.

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

*a Masking Tape

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

*a Marked Line

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

(4) Turn the steering wheel assembly to the center position. HINT: Look at the upper surface of the steering wheel assembly, steering spoke and SRS airbag line to find the center position.

*a Marked Line

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

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

(7) Convert the measured distance to steering angle.

(b) Adjust the steering angle.

(1) Draw a line on the RH and LH tie rod end sub-assemblies and rack end sub-assemblies where it can be easily seen.

*a Matchmark

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

(3) Loosen the RH and LH lock nuts.

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

HINT:

One 360 degree turn of the rack ends (1.0 mm (0.0394 in.)) horizontal movement equals 12 degrees of steering angle.

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

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

(7) Perform calibration of torque sensor zero point.

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