2005 LEXUS ES300 ECU

RESET MEMORY FUNCTION ± TC002-03 Revised May 5, 2003
Page 2 of 3
SPECIAL SERVICE TOOLS (SSTs)PART NUMBERQUANTITY
Lexus Diagnostic Tester Kit*010012701
CAN Interface Module Kit*010027441
12 Megabyte Diagnostic Tester Program Card
with version 12.01a Software (or later)*01002593-0051
* 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.
1. Connect the Lexus Diagnostic Tester to the vehicle.
2. Reset the ECM (PCM). Refer to the procedures below.
DO YOU WISH TO
RESET THE ECM?
[YES] to CONTINUE
[NO] to EXIT
2: CUSTOMIZE
3: ECU REPROGRAMFUNCTION SELECT FOR
NORTH AMERICA
B
*APPLICATION SELECT*
A
1: DIAGNOSISDIAGNOSTIC MENU
ENGINE
C
DO NOT USE THIS
FUNCTION UNLESS
INSTRUCTED BY
REPAIR MANUAL.RESET MEMORY
E
RESET MEMORY
NOTICE
D
[YES]
F
1: OBD/MOBD
3: CARB OBD II
4: BREAK±OUT BOX
5: NVH
6: AUTOPROBE
7: 02 RPM CHECK
8: SNAPSHOT REVIEW
9: SETUP
0: GAS ANALYSIS2: ENHANCED OBD II1: DATA LIST
2: DTC INFO
3: ACTIVE TEST
4: SNAPSHOT
5: SYSTEM CHECK
6: RESET MEMORY
7: MONITOR STATUS
8: CHECK MODE
6: RESET MEMORY
ONLY USE AFTER
REPLACING THE ENGINE,
AUTO TRANS, OR ECM
ON CERTAIN VEHICLES.EXECUTING THIS
FUNCTION WILL RESET
THE LEARNED VALUES
IN THE ECM.RESET MEMORY
RESETTING COMPLETE
PRESS
[ENTER]
3. Start the engine and warm it up to normal operating temperatures before test±driving.
4. Perform a thorough test drive with several accelerations from a stop with ªlight
throttleº application until proper transmission shifting is verified.
Required
SSTs
Reset
Procedure 1

ECM CALIBRATION: SHIFTING ENHANCEMENT ± TC004-03 Revised August 4, 2003
Page 5 of 6
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).
± The 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
33341300
53328300
NOTE:
If Calibration ID matches ªPrevious Calibration IDº as shown in Calibration
Identification Chart on page 3, proceed with flash reprogramming.
If Calibration ID matches ªNew Calibration IDº as shown in Calibration Identification
Chart, this vehicle has already been programmed. Refer to TIS for diagnostic
procedures applicable to any stored DTCs.
3. If ECU calibration ID is not the same as the ªNew Calibration IDº listed previously,
proceed to Flash Reprogram ECM (PCM).
4. Flash Reprogram ECM (PCM)
Follow the procedures outlined in Lexus TSIB No. SS001±01,
ªECU Flash
Reprogramming Process,º
and flash the ECM (PCM) with the new calibration
file update.
NOTE:
If the ªCheck Engineº light is ON when the ignition is turned back on to begin the
reprogramming process, a scan tool cable problem exists. Refer to TSIB No.
SS001±01,
ªECU Flash Reprogramming Process.º
Repair
Procedure
(Continued)

ECM CALIBRATION: SHIFTING ENHANCEMENT ± TC004-03 Revised August 4, 2003
Page 6 of 6
5.Reset the ECM (PCM) learned values using the diagnostic tester. Refer to the
procedures below.
± The sample screen prints seen below are the 12.01a software version and may
differ from subsequent software versions.
NOTE:
Failure to reset the ECM (PCM) memory will result in continued ATM shifting complaints.
DO YOU WISH TO
RESET THE ECM?
[YES] to CONTINUE
[NO] to EXIT
2: CUSTOMIZE
3: ECU REPROGRAMFUNCTION SELECT FOR
NORTH AMERICA
B
*APPLICATION SELECT*
A
1: DIAGNOSISDIAGNOSTIC MENU
ENGINE
C
DO NOT USE THIS
FUNCTION UNLESS
INSTRUCTED BY
REPAIR MANUAL.RESET MEMORY
E
RESET MEMORY
NOTICE
D
[YES]
F
1: OBD/MOBD
3: CARB OBD II
4: BREAK±OUT BOX
5: NVH
6: AUTOPROBE
7: 02 RPM CHECK
8: SNAPSHOT REVIEW
9: SETUP
0: GAS ANALYSIS2: ENHANCED OBD II1: DATA LIST
2: DTC INFO
3: ACTIVE TEST
4: SNAPSHOT
5: SYSTEM CHECK
6: RESET MEMORY
7: MONITOR STATUS
8: CHECK MODE
6: RESET MEMORY
ONLY USE AFTER
REPLACING THE ENGINE,
AUTO TRANS, OR ECM
ON CERTAIN VEHICLES.EXECUTING THIS
FUNCTION WILL RESET
THE LEARNED VALUES
IN THE ECM.RESET MEMORY
RESETTING COMPLETE
PRESS
[ENTER]
Figure 3. ECM (PCM) Learned Values Reset
6. Follow the procedures outlined in TSIB No. EG012±04, ªEntering VIN During ECM
(PCM) Replacement and/or DTC P0630,º
and write the VIN to the ECM (PCM).
7. Start the engine and warm it up to normal operating temperature before test±driving.
8. Test drive vehicle to confirm proper vehicle operation.
9. Enter the required information on the Authorized Modifications Label and affix it to the
vehicle at the location shown in Figure 1 (page 4). The Authorized Modifications
Label is available through the MDC, P/N 00451±00001±LBL.
10. Calibration update is complete.
NOTE:
Select premium unleaded gasoline with an Octane Rating of 91 (Research Octane
Number 96) or higher for optimum engine performance.
The effect of the new calibration may become more apparent after several days
of driving as the ECM (PCM) ºlearned valuesº are re±established from the
customer 's driving. Repair
Procedure
(Continued)