September 23, 2013

L-SB-0072-13

Initialization of VGRS System During PDS
Service
Category

General

Section

Pre-Delivery Service

Market

USA

Applicability
YEAR(S)

MODEL(S)

2014

LS460, LS600H

ADDITIONAL INFORMATION

Introduction

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 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 fuses 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 EQUIPMENT

SUPPLIER

Techstream 2.0*
TIS Techstream

PART NUMBER

QTY

TS2UNIT
ADE

Techstream Lite

1

TSPKG1
TSLITEDLR01

* Essential SST.

NOTE
• Only ONE of the Techstream units listed above is required.
• Software version 8.20.019 or later is required.
• Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at
1-800-368-6787.

© 2013 Lexus, a division of Toyota Motor Sales, USA

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L-SB-0072-13

Page 2 of 2

September 23, 2013

Initialization of VGRS System During PDS

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.
A. Access the VGRS Data List using 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 following sections in the Repair Manual
on the Technical Information System (TIS):
• Steering – Steering Column – “Steering Column: Variable Gear Ratio Steering System:
Calibration”
• Steering – Steering Column – “Steering Column: Variable Gear Ratio Steering System:
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.

© 2013 Lexus, a division of Toyota Motor Sales, USA