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Initialization Of VGRS System During PDS (L-SB-0064-10)

Publication date: 2010-07-14
Reference number: L-SB-0064-10

INITIALIZATION OF VGRS SYSTEM DURING PDS

INITIALIZATION OF VGRS SYSTEM DURING PDS

TECHNICAL SERVICE BULLETIN

Reference Number(s): L-SB-0064-10, Date of Issue:  July 14, 2010
LEXUS: 2011 GS350, GS460
Service Category: General
Section: Pre-Delivery Service
COPYRIGHT: © 2018 Lexus, a division of Toyota Motor Sales, USA License Agreement TMS1002

APPLICABILITY

APPLICABILITY

YEAR(S) MODEL(S) ADDITIONAL INFORMATION
2011 GS350, GS460  

INTRODUCTION

The DCC fuse is 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 fuse, the VGRS system will be inoperative and the steering wheel may be off-center.

After the DCC fuse is installed, the VGRS system will be operative, but the steering wheel may become off-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 during Pre-Delivery Service (PDS) or when reconnecting the battery terminal.

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

REQUIRED TOOLS & EQUIPMENT

REQUIRED TOOLS & EQUIPMENT

REQUIRED EQUIPMENT SUPPLIER PART NUMBER QTY
TIS Techstream(1)
or
Techstream Lite
NOTE: Software version 5.01.001 or later is required.
 ADE TSPKG1
or
TSLITEDLR01		 1
(1) Essential SST.
NOTE: Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.

WARRANTY INFORMATION

WARRANTY INFORMATION

OP CODE DESCRIPTION TIME OFP T1 T2
N/A Not Applicable to Warranty - - - -

INITIALIZATION PROCEDURE

  1. Drive the vehicle on a straight road at 22 mph (35 km/h) 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, 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.
    1. Access the VGRS Data List using TIS Techstream:

      Chassis/VGRS/Data List 

    2. 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), 2011 model year GS 350/460 Repair Manual, Steering - Steering Column - "Steering Column: Variable Gear Ratio Steering System: Calibration" and "Steering Column: Variable Gear Ratio Steering System: Check 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.
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