TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN 24LC03
MALFUNCTION INDICATOR LAMP (MIL) IS ON WITH DTC P05CE00
SOFTWARE UPDATE
CERTAIN 2023-2024 NX 350 VEHICLES
CERTAIN 2023-2024 RX350 VEHICLES
CERTAIN 2024 TX 350 VEHICLES

The repair quality of covered vehicles is extremely important to Lexus. All dealership technicians
performing this Special Service Campaign are required to successfully complete the most current
version of the E-Learning course “Safety Recall and Service Campaign Essentials”. To ensure that all
vehicles have the repair performed correctly; technicians performing this Special Service Campaign
are required to have completed the following trainings:
•

LIC206A - Electrical Repair 1

It is the dealership’s responsibility to select technicians who have completed the above trainings to
perform this Special Service Campaign repair. Carefully review your resources, the technician skill
level, and ability before assigning technicians to this repair. It is important to consider technician
days off and vacation schedules to ensure there are properly trained technicians available to perform
this repair at all times.

I.

OPERATION FLOW CHART

II. IDENTIFICATION OF AFFECTED VEHICLES
1.

CHECK VEHICLE FOR CAMPAIGN ELIGIBILITY
a) Compare the vehicle’s VIN to that listed on the Repair Order to ensure they match.
b) Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and that it has not
already been completed.
HINT:
TMNA warranty will not reimburse dealers for repairs completed on vehicles that are not affected or
were previously completed, even by another dealer.

III. PREPARATION
1.

PARTS

PART NUMBER

PART NAME

QTY

00451-00001-LBL

Authorized Modifications Label

1

NOTE: Authorized Modifications Labels may be ordered in packages of 25 from the Materials Distribution
Center (MDC) (portal.toyotamdc.com) under item No. 00451-00001-LBL.
1

2.

TOOLS & EQUIPMENT
•
•
•

DCA-8000 Battery Diagnostic Station
MCC-070C battery chargers.
Techstream ADVi / Techstream Lite

NOTE: Only ONE of the Techstream units listed above is required. Be sure to use the latest.
GTS+ software version available. 2023.02.001.02 or later is required.

IV. BACKGROUND

The Engine Control Computer software has a programing error which can cause the exhaust variable valve
timing (VVT) locking pin to temporarily get stuck. When this happens, an engine malfunction indicator lamp
(MIL) can appear on the dashboard as well as diagnostic trouble code (DTC), P05CE00 to be set
.

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V. SAFETY PRECAUTIONS
CRITICAL INFORMATION - READ THOROUGHLY

An ECU could be damaged if an error occurs in the communication while reprogramming is taking place. Confirm all
work is performed as described in these instructions.

1.

STABILIZE THE POWER TO THE PC (PERSONAL COMPUTER)
a) Be sure to connect the PC to an external AC power supply.

NOTICE:
The ECU could be damaged if the battery voltage of the PC drops
while reprogramming.

b)

Turn off the screen saver and power saving mode of the PC so
that the power to the hard disk remains supplied.

NOTICE:
If the screen saver or power saving mode launches while
reprogramming, the communication may be disconnected,
resulting in damage of the ECU.
c)

DO NOT block the ventilation opening for the cooling fan of the
PC.

NOTICE:
If the ventilation opening for the cooling fan is blocked with a
sheet cover or the like, the PC may overheat, causing the operation
of the PC to stop.
Due to the stopped operation, the communication for
reprogramming signals could also be stopped, resulting in damage
of the ECU.

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VI. ENGINE SYSTEM CALIBRATION ID VERIFICATION
1.

CHECK FOR DTC’S
a) Using GTS+, click the “Health Check” button on the Main Menu.
b) *NOTE – If P05CE00 is present, disregard, and proceed with the
procedure.

HINT:
This Campaign covers only the software update to the Engine
System, as detailed in these instructions. It does not cover the
diagnosis or replacement of any other systems on the vehicle.

2.

CHECK CURRENT CALIBRATION
a) Locate the “Update” column of the “Calibration Information” for the Engine system on the "Health Check
Result" screen.
b) Determine the status of an available update; indicated by a YES or NO.
HINT:
If the CIDs indicate ‘Yes’, proceed with the update procedure.

Is there an update available for
the Engine ECU (ENG & ECT)?
Yes

Proceed to section VII. Vehicle
preparation on page 5.

No

Campaign complete. Return the
vehicle to the customer.

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VII. VEHICLE PREPERATION
1.

VEHICLE PREPERATION
a) Confirm the following conditions:
• Vehicle in the IG position (READY
OFF).
•
•

•
•

Transaxle in Park.
Parking brake engaged.

•

Turn off all electrical accessories (i.e. climate control,
audio system, etc.)
Headlight switch in the DRL OFF position. (w/ DRL
OFF position)
Windshield wiper switch in the OFF position.

b)

When the vehicle has no “OFF position” in the light control
switch:
1) Turn the IG ON.
2) Set the light control switch to the AUTO position and make sure
that the exterior lights are turned on.
3) Light up the automatic light control sensor with work light to
keep the exterior lights turned off.

2.

CONNECT THE 12V BATTERY TO A POWER SUPPLY
a) Connect the DCA-8000 or other type of a power supply (not a battery charger) to the 12 V battery.
b) Tap the Reflash icon from the Main Menu screen of the DCA-8000.
A power supply MUST be used during reprogramming. ECU damage will occur if the battery
voltage is not properly maintained during this re-flash procedure.

NOTICE:
A power supply must be connected directly to the 12 V battery terminals and NOT the remote jump
posts under the hood (if equipped).

3.

VERIFY GTS+ SETUP
a) Verify that the GTS+ meets the following conditions:
•
•
•

The latest version of software is loaded.
Connect the GTS+ to a 120 V source.
The DLC III cable is in good condition.

The GTS+’s battery voltage must also be maintained during the re-flash procedure. Plug the
GTS+ into a 120 V outlet during this procedure to be sure the PC does not stop operating during
reprograming.
NOTICE:
If the GTS+ communication with the vehicle fails during the re-flash procedure, the Engine Control
Computer will be damaged.

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VIII.
1.

UPDATE CALIBRATION
CONFIRM THE CALIBRATION ID
a) Confirm the current calibration ID in the Engine System.

NOTICE:
If the Engine Control Computer has the New CIDs, no update is necessary.

2.

REPROGRAM THE ENGINE CONTROL COMPUTER
a) Click “Yes” on the “Health Check Results” screen or follow the links on the table above the begin the
reprograming process.
Follow the procedures outlined in L-SB-0068-23, L-SB-0048-23, L-SB-0026-24, L-SB-0025-24 GTS+
ECU Flash Reprogramming With Security Signature, and flash reprogram the ECM (PCM) with the
NEW calibration file update.

NOTICE:
Re-flash failure can be avoided by following all instructions and reprogramming best practices.

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The calibration IDs to re-flash in this campaign are as shown in the table below.
System

Vehicle Model

2023 NX350

Engine

2024 NX350

2023 RX350

Engine
2024 RX350

2024 TX350

Engine Control Computer Calibrations
Specification
Current Calibration ID
8A2227801000
8A2227801100
8A2227801200
TMK made, except F Sport
8A2227801300
8A2227801400
8A2227801500
8A2227805000
8A2227805100
8A2227805200
TMK made, F Sport
8A2227805300
8A2227805400
8A2227805500
8A222F603000
8A222F603100
TMMC made, except F Sport
8A222F603200
8A222F603300
8A222F604000
8A222F604100
TMMC made, F Sport
8A222F604200
8A222F604300
8A2227811000
8A2227811100
TMK made, except F Sport
8A2227811200
8A2227815000
TMK made, F Sport
8A2227815100
8A2227815200
8A222F605000
TMMC made, except F Sport
8A222F605100
8A222F606000
TMMC made, F Sport
8A222F606100
8A2220E10000
8A2220E10100
TMMC made, FWD
8A2220E10200
8A2224825000
TMK made, FWD
8A2224825100
8A2224825200
8A2220E11000
TMMC made, 4WD
8A2220E11100
8A2220E11200
8A2220E29000
8A2220E29100
TMMC made, FWD
8A2220E29200
8A2224837000
8A2224837100
TMK made, FWD
8A2224837200
8A2224837300
8A2220E30000
TMMC made, 4WD
8A2220E30100
8A2220E30200
8A2220E19000
FWD
8A2220E19100
8A2220E18000
4WD
8A2220E18100

New Calibration ID

8A2227801600

8A2227805600

8A222F603400

8A222F604400

8A2227811300
8A2227815300
8A222F605200
8A222F606200
8A2220E10300
8A2224825300
8A2220E11300
8A2220E29300

8A2224837400

8A2220E30300
8A2220E19200
8A2220E18200

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IX. COMPLETE REPAIR
1.

DISCONNECT THE DCA-8000

2.

3.

PERFORM VERIFICATION HEALTH CHECK
a) Using a GTS+, click the “Health Check” button on the Main
Menu.
b) Clear DTC’s that may have set during the re-flash procedure.
c) Re-run the Health Check to confirm that no DTC’s reappear.
THIS VERIFICATION HEALTH CHECK IS
NECESSARY to update the results and CIDs
to the National database.

CONFIRM CID UPDATE
a) On the Stored Data tab, confirm the following for the Engine System:
•
•

The Calibration number has the “New CID” number.
The Update column says “No”.

Have someone other than the technician who completed the software update confirm the CIDs
have been updated successfully to the NEW CIDs. Refer to page 5.

4.

PRINT CUSTORMER HEALTH CHECK REPORT
a) From the Stored Data tab, select the Customer Health Check
Report button (TIS will launch when button is pressed).
b) Log in to TIS.
c) Input Vehicle Mileage and Repair Order number.
d) Check the “Performed” campaign button for the applicable
campaigns.
e) Select the Report button.

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f)
g)
h)

Confirm Customer Health Check Report information is correct.
Print Customer Health Check Report from TIS.
Sign and provide to the customer.
◄ VERIFY REPAIR QUALITY ►

- Confirm the re-flash completes successfully by have a 2nd person verify the post repair health check report.
- Confirm there are no DTCs after the Calibration update.
- If you have any questions regarding this update, please contact your area representative.

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X. APPENDIX
A. CAMPAIGN DESIGNATION DECODER

Examples:
20TA01 = Launched in 2020, Lexus, Safety Recall Remedy Phase, 1st Safety Recall Launched in 2020
21TC02 = Launched in 2021, Special Service Campaign, 2nd Special Service Campaign Launched in 2021
22TE05 = Launched in 2022, Customer Support Program, 5th Customer Support Program Launched in 2022

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