L-SB-0033-08 June 6, 2008 Technical Service Information Bulletin

Hesitation on Acceleration

Service
Category Engine/Hybrid System
Lexus Supports ee
Section Engine Control Market USA ASE Certification ag
Applicability
YEAR(S) MODEL(S) ADDITIONAL INFORMATION
2007 — 2008 LS460

Introduction

Some vehicles may exhibit a hesitation on acceleration and in some cases set Diagnostic Trouble
Code (DTC) P2119 (Throttle Actuator Control Throttle Body Range/Performance). To enhance

the smoothness of acceleration the Engine Control Module/ECM (SAE term: Powertrain Control
Module/PCM) calibration has been revised. In some instances, the replacement of the cylinder
heads may also be required. Use the following repair procedure to address the customer's concern.

Production Change Information

This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown below.

MODEL COUNTERMEASURE “++. PRODUCTION CHANGE EFFECTIVE VIN

LS460 . JTHBL46FX85055264
: ECM Calibration

LS460L JTHGL46F485021651

LS460 Cylinder Head Manufacturing JTHBL46F 385058684

LS460L. Process Change JTHGL46F385022564

Warranty Information

OP CODE DESCRIPTION TIME OFP 71 T2
EG8017 Recalibrate ECM (PCM) 0.6 89661 -#HHHHE 99
110011 R & R RH & LH Cylinder Head 17.7 11101-39655 04
- 50
Combo A Opposite Side 8.2 11102-39185

© 2008 Lexus, a division of Toyota Motor Sales, USA Page 1 of 7

QQ vexus L-SB-0033-08 June 6, 2008 Page 2 of 7

Hesitation on Acceleration

Warranty Information (Continued)

APPLICABLE WARRANTY

¢ Op Code EG8017: This repair is covered under the Lexus Federal Emission Warranty. This
warranty is in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle’s
in-service date.

* Op Code 110011: 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.

Calibration Information

MODEL ECM (PCM) P/N PREVIOUS CALIBRATION ID NEW CALIBRATION ID vps
89661 -50A10 35036000
89661-50A11 35036100 BL46F
LS 460/460L 35055100
89661-50A12 35036200 GL46F
89661 -50C00 35055000

Parts Information

PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME QTY
11101-39655 Same Head Sub-assembly, Cylinder, RH 1
11102-39185 Same Head Sub-assembly, Cylinder, LH 1

89661 -50A10
89661-50A11
89661-50A12
89661-50C00

- 00451-00001-LBL Authorized Modifications Label 1

89661-50001 Computer, Engine Control (ECM) -

NOTE
¢ The ECM (PCM) 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.

© 2008 Lexus, a division of Toyota Motor Sales, USA

' @usus L-SB-0033-08 = ~~ June6,2008 Page 3 of 7

Hesitation on Acceleration

Required Tools & Equipment

REQUIRED EQUIPMENT - SUPPLIER PART NUMBER QTY

TIS techstream*
ADE TSUNT 1

NOTE: Software version 3.00.021 or later is required.

* Essential SST.

NOTE

¢ Additional TIS techstream units may be ordered by calling Approved
Dealer Equipment (ADE) at 1-800-368-6787.

¢ The Diagnostic Tester is NOT recommended for flash reprogramming with
this calibration file. Please use TIS techstream or an approved J2534
interface to perform this update. Visit techinfo.toyota.com for more
information regarding J2534 reprogramming.

SPECIAL SERVICE TOOLS (SST’S) PART NUMBER QTY
GR8 Battery Diagnostic Station* 00002-MCGR8 1
Valve Spring Compressor 09202-70020 1
Starter Armature Bearing Replacer 09201-41020 1
Crankshaft Pulley Holding Tool* (Bolt) 09213-54015-01 (90119-08216-01) 1
Companion Flange Holding Tool* 09330-00021 1
Universal Puller Set “C”* 09950-50013-01 1

* Essential SST.

NOTE
Additional SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.

TOOLS & MATERIAL QUANTITY

Toyota Genuine Seal Packing Black, Three Bond 1207B, or equivalent As needed

© 2008 Lexus, a division of Toyota Motor Sales, USA

@tiexus L-SB-0033-08 June 6, 2008 Page 4 of 7

Hesitation on Acceleration

Repair Procedure

1. Attach a Techstream unit and test drive the vehicle. Record all data duplicating the concern.
Review the Knock Correct Learn Value, and the Ignition (IGN) Advance.

2. If the Knock Correct Learn Value drops from 17.0 CA to below 12.0 CA, and the IGN Advance
goes to a negative degree value while duplicating the concern — continue to Step 3.

if the values are comparable to a known good vehicle, the concern may NOT be related to this
TSIB — diagnose the concern per the Technical Information System (TIS) depending upon
symptoms.

3. Check the condition of the spark plugs.
¢ If the spark plugs appear normal — go to Repair Procedure A.

¢ {fone or more of the spark plugs has a brown residue on the porcelain and electrode —
go to Repair Procedure B.

© 2008 Lexus, a division of Toyota Motor Sales, USA
\ @Qvexus L-SB-0033-08 June 6, 2008 Page 5 of 7

Hesitation on Acceleration

Repair Procedure A

1. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in
Figure 1. Confirm if the ECM (PCM) calibration has been updated. If the calibration ID listed is
NOT the latest ECM (PCM) calibration — go to step 2.

If the calibration ID listed IS the latest ECM (PCM) calibration — verify the spark plugs again for
a brown residue. If no residue is found, diagnose per TIS depending upon symptoms.

Figure 1. Location of Authorized Modifications Label on 2007 LS 460

TOYOTA MOTOR CORPORATION
AUTHORIZED MODIFICATIONS

THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPAAND CARB
@-———BP} DEALER CODE: DATE: +t 8
CHANGE AUTHORITY: ~