Lexus 89661-50690 Operating and installation instructions

Lexus Supports ASE Certification Page 1 of 4
Title:
ECM CALIBRATION:
SHIFTING ENHANCEMENT
Models:
’04 -- ’05 LS 430
Technical Service
Information Bulletin
December 6, 2004
TC006-04
To enhance low speed ATM shifting, the Engine Control Module or ECM (SAE term:
Powertrain Control Module/PCM) calibration has been updated.
S2004 model year LS 430 vehicles.
S2005 model year LS 430 vehicles produced BEFORE the Production Change
Effective VIN shown below.
MODEL PRODUCTION CHANGE EFFECTIVE VIN
2005 LS 430 JTHBN36F*5005700
MODEL YEAR MAIN/SUB ECM (PCM) PREVIOUS CALIBRATION ID NEW CALIBRATION ID
2004
Main
35013000
35013100
35013200
35013300
2
0
0
4
Sub 55013000
55013100 55021100
2005 Sub 55021000 55021100
OP CODE DESCRIPTION TIME OFP T1 T2
TC4006 Recalibrate ECM Engine 1.3
89661--50690
89661--50691
89661--50692
89661--50780
87 99
Applicable Warranty*:
This repair is covered under the Lexus Emissions Warranty. This warranty is in effect
for 96 months or 80,000 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.
TRANSMISSION & CLUTCH
Introduction
A
pplicable
Vehicles
Production
Change
Information
Calibration
Identification
Information
Warranty
Information

ECM CALIBRATION: SHIFTING ENHANCEMENT -- TC006-04 December 6, 2004
Page 2 of 4
MODEL YEAR PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME QTY
2004
89661--50690
89661--50691
89661--50692
N/A Computer,
Engine Control
1
2005 89661--50780 89661--50781
E
n
g
i
n
e
C
o
n
t
r
o
l
1
PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME QTY
N/A 00451--00001--LBL Authorized Modification Labels 1
NOTE:
Authorized Modification Labels may be ordered in packages of 25 from the
Materials Distribution Center (MDC) through Dealer Daily or by calling the
MDC at 1--800--622--2033.
SPECIAL SERVICE TOOLS (SSTs) PART NUMBER QUANTITY
Lexus Diagnostic Tester Kit* 01001270 1
CAN Interface Module Kit* 01002744 1
12 Megabyte Diagnostic Tester Program Card
with version 12.01a Software (or later)* 01002593-005 1
* Essential SSTs.
NOTE:
Additional Diagnostic Tester Kits, CAN Interface Modules, Program Cards or other
SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.
Parts
Information
Required
SSTs

ECM CALIBRATION: SHIFTING ENHANCEMENT -- TC006-04 December 6, 2004
Page 3 of 4
1. Check for the Authorized Modification Label affixed to the vehicle in the location
shown in Figure 1. Confirm that the ECM (PCM) calibration has been updated.
If not the latest ECM (PCM) calibration -- go to step 2.
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
DATE:DEALER CODE:
CHANGE AUTHORITY: TSIB TC006- 04
55021100
89661- 50781
Replacement
ECM (PCM)
Part
Number
Calibration
ID(s)
TSIB Number
Date
Completed
Dealer Code
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
Figure 1. Location of Authorized Modifications Label on 2004 and 2005 model year LS 430
2. Connect the Diagnostic Tester to the vehicle and select “CURRENT ECU CAL” from
the “ECU REPROGRAM MAIN MENU.” Determine the vehicle’s current ECU
calibration (see Figure 2).
SThe sample screen prints seen below are the 12.01a software version, and may
differ from subsequent software versions.
Figure 2. Determining Current ECU Calibration
ECU REPROGRAM
MAIN MENU
1: GET CAL FROM PC
2: CURRENT ECU CAL
3: UPDATE ECU CAL
4: CAL ON TESTER
5: CLEAR CAL DATA
A
CURRENT ECU CAL
B
CALIBRATION ID
55013000
35013000
UPDATE ECU CAL
C
CURRENT CAL
55013000
35013000
SELECT MATCHING ID
35013100
35013000
Repair
Procedure

ECM CALIBRATION: SHIFTING ENHANCEMENT -- TC006-04 December 6, 2004
Page 4 of 4
NOTE:
SIf Calibration ID matches “Previous Calibration ID” as shown in Calibration
Identification chart on page 2, proceed with flash reprogramming.
SIf Calibration ID matches “New Calibration ID” as shown in Calibration
Identification chart, this vehicle has already been reprogrammed.
3. If ECU calibration ID is not the same as the “New Calibration ID” listed previously,
proceed to Flash Reprogram ECM (PCM).
CAUTION:
When reprogramming the LS 430, 12.01a production version or later MUST be used.
Using any previous versions of software for reprogramming may result in
IRREPARABLE DAMAGE to the ECU!
NOTE:
SIf the “Check Engine” light is ON when ignition is turned back on to begin the
reprogramming process, a scan tool cable problem exists. Refer to TSIB No.
SS003--01, “ECU Flash Reprogramming Error Message.”
SWhen reprogramming the LS 430 for this issue, calibration files for 2004 and 2005
model year cannot exist on the same Diagnostic Tester Program Card.
If necessary, delete previous calibrations from the Diagnostic Tester Program Card
before downloading the new calibration file.
SWith this calibration update, 2004 model year vehicles are updated to 2005 model
year logic. When diagnosing powertrain--related M.I.L. “ON” or performance issues,
refer to the 2005 LS 430 Repair Manual for both 2004 and 2005 model year vehicles.
S2004 model year vehicles require VIN registration following reprogramming to
prevent M.I.L. “ON” (P0630).
1. Disconnect the radiator fan connectors, and connect a battery charger to the vehicle’s
battery. This will avoid voltage variations that can permanently damage the ECM
(PCM) during the reprogramming process.
2. Follow the procedures outlined in TSIB No. SS001--01, “ECU Flash Reprogramming
Process,” and flash the ECM (PCM) with new calibration file update.
3. Reconnect the radiator fan connectors, and disconnect the battery charger.
4. Enter the required information on the Authorized Modifications label and affix it to the
vehicle at the location shown in Figure 1 (page 3). The Authorized Modifications label
is available through the MDC, P/N 00451--00001--LBL.
5. Enter VIN of vehicle in ECM memory. Refer to procedures outlined in TSIB No.
EG012--04, “Entering VIN During ECM (PCM) Replacement and/or DTC P0630.”
6. Start the engine and warm it up to normal operating temperatures before test--driving.
7. Perform a thorough test drive with several accelerations from a stop with “light
throttle” application until proper transmission shifting is verified.
Repair
Procedure
(Continued)
Flash
Reprogram
ECM