L-SB-0079-15

L-SB-0079-15
October 14, 2015
Initialization of VGRS System during PDS
Service
Category
General
Section
Pre-Delivery Service
Market USA
Applicability
YEAR(S)
MODEL(S)
2016
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 using 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
Techstream 2.0*
Techstream Lite
SUPPLIER
ADE
PART NUMBER
QTY
TS2UNIT
1
TSLITEPDLR01
* Essential SST.
NOTE
• Only ONE of the Techstream units listed above is required.
• Software version 10.20.030 or later is required.
• Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
© 2015 Lexus, a division of Toyota Motor Sales, USA
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L-SB-0079-15
October 14, 2015
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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 (LS 460 / LS 600h)”
• Steering – Steering Column – “Steering Column: Variable Gear Ratio Steering
System: Test Mode Procedure (LS 460 / LS 600h)”
• 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.
© 2015 Lexus, a division of Toyota Motor Sales, USA