Steering/Suspension - Vehicle Pulls to Right Slightly

STEERING
ST003-05

Title
VEHICLE SLIGHT PULL/DRIFT TO
RIGHT IMPROVEMENT

Models
'06 RX 400h

November 11, 2005

Introduction

Some 2006 model year RX 400h vehicle customers may experience a vehicle pull or drift to the right. Please use these repair methods in conjunction with the Repair Manual instructions.

Applicable Vehicles

^ 2006 model year RX 400h vehicles produced BEFORE the Production Change Effective VIN shown below.





Production Change Information





Parts Information





Warranty Information

Applicable Warranty*:
This repair is covered under the Lexus Comprehensive Warranty. This warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.

* Warranty application is limited to correction of a problem based upon a customer's specific complaint.





Required SSTs





Repair Procedure Flow Chart

Repair Procedure

1. Confirm symptoms (preliminary check).

A. Perform a road test on the vehicle to confirm the customer's complaint involves the vehicle pulling/drifting to the right or steering wheel off-center.

B. If the steering wheel is off-center, then perform an alignment and road test on the vehicle to confirm the condition is corrected.

2. Determine if the pulling/drifting to the right is caused by the tires, alignment settings, or the power steering computer.

^ If the tires are non-unidirectional, cross-rotate the left and right front tires.

^ If the tires are unidirectional, then proceed to step 3C (measure and adjust the vehicle alignment to within specifications).

3. Perform a road test on the vehicle to determine if the direction of pull has changed.

A. If the vehicle pull/drift is eliminated, then the probable cause is tire conicity, and the repair is completed.

B. If the pull/drift has reversed (i.e., now pulls to the left), then refer to TSB No. ST004-01, "Repair Manual Supplement: Vehicle Pulling to One Side."

C. If the tire rotation did NOT change the pulling/drifting condition, then measure and adjust the vehicle alignment to within specifications.

D. Increase right front camber and decrease left front camber.

NOTE:

^ Do NOT exceed 1° of cross camber.

^ Do NOT exceed adjustment specification range.

E. If the vehicle still exhibits a pull/drift to the right after performing the alignment, then replace the power steering computer assembly (P/N 89650-48010).

For removal and installation of the power steering computer assembly, refer to the Technical Information System (TIS), 2006 model year RX 400h Repair Manual: Power Steering: Power Steering ECU: Components, Removal and Installation.