Canada - Steering - VGRS Initialization Procedure

L-TCI-3257

November 30, 2012

INITIALIZATION OF VGRS SYSTEM DURING PDS

Service Category
General

Section
Pre-Delivery Service

Market
Canada





APPLICABILITY:

INTRODUCTION:

This bulletin describes the initialization procedure for the Variable Gear Ratio Steering (VGRS) system. The DCC fuses are removed at the assembly plant to reduce parasitic current draw from the battery during transport and storage. As a result of the removal of the DCC fuses, the Variable Gear Ratio Steering (VGRS) system will be inoperative and the steering wheel may be off-center. After the DCC fuses are reinstalled, the VGRS system will be operative, but the steering wheel may become oft-center by 5-10 degrees. This condition may also appear when the battery terminal has been disconnected.

Initialize the VGRS system following the procedure in this bulletin after installing the DCC fuse or when reconnecting the battery terminal.

NOTE

Do NOT adjust the steering wheel centering (i.e., do NOT adjust tie rod ends) before initialize of the VGRG system, or the steering may be off-center after initialization.





WARRANTY INFORMATION:





REQUIRED TOOLS & EQUIPMENT:

INITIALIZATION PROCEDURE:

1. Drive the vehicle on a straight road at 35 km/h (22 mph) or more for at least 5 seconds. At this point, the steering wheel will still remain off-center by 5 - 10 degrees.

NOTE

In this step, the neutral position of the steering wheel is recorded in the VGRS ECU memory

2. Perform normal cornering 2 - 3 times. The steering wheel position is automatically corrected in this step.

3. With the vehicle stopped, turn the steering wheel from lock to lock and then drive straight again.

4. Confirm the steering wheel is centered.

^ If the steering wheel is centered, initialization is complete. Go to step 5.

^ If the steering wheel is off-center, repeat steps 1 - 3.

5. Confirm initialization has been completed.

A. Access the VGRS Data List using ETAS Techstream:

Chassis/VGRS/Data List

B. Confirm the "STRAIGH ANG FLG" parameter reads "VALID."

NOTE

Prior to initialization, the "STRAIGH ANG FLG" parameter will read "INVALID." When the VGRS initialization procedure is complete, the "STRAIGH ANG FLG" parameter will change to "VALID."

^ If "VALID" and steering is off-center, refer to the Technical Information System (TIS), 2013 model year LS600h Repair Manual, "Steering Steering Column Steering Column Variable Gear Ratio Steering Calibration and "Steen7ng Column Variable Gear Ratio Steering: Test Mode Procedure".

^ If "INVALID," return to step 1 and perform driving procedure again.

^ If "INVALID" returns again, check for VGRS system DTCs and diagnose the condition following the procedures found in the Repair Manual.

© 2012 Lexus, a division of Toyota Motor Sales, Canada