Brake Hold System Does Not Release Upon Acceleration (TC004-07)
Publication date: 2007-04-16Reference number: TC004-07
BRAKE HOLD SYSTEM DOES NOT RELEASE UPON ACCELERATION
TECHNICAL SERVICE BULLETIN
Reference Number(s): TC004-07, Date of Issue:
April 16, 2007
| COPYRIGHT: | © 2018 Lexus, a division of Toyota Motor Sales, USA License Agreement TMS1002 |
BRAKE HOLD SYSTEM DOES NOT RELEASE UPON ACCELERATION
Model(s): 2007 LS 460/460L
Section: TRANSMISSION & CLUTCH
Bulletin No.: TC004-07
Date: April 16, 2007
Introduction
Some 2007 model year LS 460 vehicles may display a condition where the vehicle does NOT accelerate from a stop with the Brake Hold System engaged. The Transmission Control Module (TCM) logic has been revised to prevent this condition.
Applicable Vehicles
- 2007 model year LS 460/460L vehicles produced BEFORE the Production Change Effective VINs shown below.
Production Change Information
PRODUCTION CHANGE INFORMATION
| MODEL | PRODUCTION CHANGE EFFECTIVE VIN |
|---|---|
| LS 460 | JTHBL46F*75024913 |
| LS 460L | JTHGL46F*75008196 |
Parts Information
PARTS INFORMATION
| PREVIOUS PART NUMBER | CURRENT PART NUMBER | PART NAME | QTY |
|---|---|---|---|
| N/A | 00451-00001-LBL | Authorized Modifications Label | 1 |
| 89535-500## | 89535-50012 | Computer, Transmission Control (TCM) | 1 |
NOTE:
- The TCM should NOT be replaced as part of the Repair Procedure.
- Authorized Modification Labels may be ordered in packages of 25 from the Materials Distribution Center (MDC) through Dealer Daily Dealer Support Materials System or by calling the MDC at 1-800-622-2033.
Warranty Information
WARRANTY INFORMATION
| OP CODE | DESCRIPTION | TIME | OFP | T1 | T2 |
|---|---|---|---|---|---|
| TC7003 | Recalibrate Transmission Control Module (TCM) | 0.5 | 89535-50010 89535-50011 |
04 | 99 |
Applicable Warranty*:
This repair is covered under the Lexus Powertrain Warranty. This warranty is in effect for 72 months or 70,000 miles, whichever occurs first, from the vehicle's in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Required Tools & Material
REQUIRED TOOLS & MATERIAL
| REQUIRED EQUIPMENT | SUPPLIER | PART NUMBER | QTY | |
|---|---|---|---|---|
| TIS Techstream*
NOTE:
Software version 2.00.008 or later is required.
|
ADE | TSUNT | 1 | |
| GR8 Battery Diagnostic Station* | SPX/OTC | 00002-MCGR8 | 1 | |
NOTE:
- Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.
- The Lexus Diagnostic Tester (with software version 14.0 or later) and CAN Interface Module may also be used to perform the service procedures listed in this bulletin.
- The GR8 Battery Diagnostic Station (P/N 00002-MCGR8) supersedes the Automatic Trickle Charger (P/N 00002-YA122-01) and Fast Battery Chargers (Associated P/N ASE6003 and Christie P/N CAPPDQ). P/N 00002-YA122-01, ASE6003, and CAPPDQ are now obsolete.
Calibration Identification Chart
CALIBRATION IDENTIFICATION CHART
| MODEL | MODEL YEAR | PREVIOUS CALIBRATION ID | NEW CALIBRATION ID |
|---|---|---|---|
| LS 460 | 2007 | 895365001000 | 895365001200 |
| LS 460L | 895365001100 |
Repair Procedure
- Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Fig 1. Confirm if the TCM calibration has been updated. If the calibration ID listed is NOT the latest TCM calibration - go to step 2.
- Flash reprogram the TCM.NOTE:
- The GR8 Battery charger MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
- For details on how to use the GR8 Battery charger please refer to the GR8 Instructions Manual, located on TIS, Diagnostics - Battery .
Follow the procedures outlined in TSIB No. L-SB-0015-10 , "Techstream ECU Flash Reprogramming Procedure," and flash the TCM with the NEW calibration file update.
- Install the Authorized Modifications Label.
- Using a permanent marker, enter the following information on the label:
- TCM part number: [Refer to the Parts Information section for the CURRENT PART NUMBER ]
- Calibration ID(s): [Refer to the CALIBRATION IDENTIFICATION CHART for the NEW CALIBRATION ID ]
- Dealer Code
- Repair Date
- Change Authority (this TSIB number): TC004-07
- Affix the Authorized Modifications Label to the vehicle at the location shown in Fig 1. The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
- Using a permanent marker, enter the following information on the label:
- The repair is complete. Test drive the vehicle to confirm normal operation.