Canada - Steering - Initialization of VGRS System
BulletinL-TCI-3004
Issue Date
September 13, 2011
Title:
INITIALIZATION OF VGRS SYSTEM DURING PDS
Service Category
General
Section
Pre-Delivery Service
Market
Canada
APPLICABILITY:
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 offcenter. 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 fuse 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.
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), 2011 model year LS460 Repair Manual, "Steering - Steering Column - Steering Column: Variable Gear Ratio Steering: Calibration" and "Steering 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.