NHTSA ID Number: 10245464
Manufacturer Communication Number: L-SB-0048-23
TSB/Document Date: 2023-11-27
Summary
TSB: Some 2023 model year RX 350 vehicles equipped with a T24A-FTS engine may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P05CE00 (Cold Start ?B? Camshaft Position Timing Performance Bank 1). The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition.
L-SB-0048-23
October 13, 2023
MIL ON With DTC P05CE00
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2023
RX350
VDS(s): BAMBA, BAMCA, CHMAA
Engine(s): T24
Introduction
Some 2023 model year RX 350 vehicles equipped with a T24A-FTS engine may exhibit a MIL ON
condition with Diagnostic Trouble Code (DTC) P05CE00 (Cold Start “B” Camshaft Position Timing
Performance Bank 1). The Engine Control Module (ECM) (SAE term: Powertrain Control
Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair
Procedure in this bulletin to address this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL2314
0.7
89661-OEK###*
8A
74
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being
repaired by searching for the parts in the Electronic Parts Catalog using the VIN filter.
APPLICABLE WARRANTY
This repair is covered under the Lexus
Federal 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 occurrence of the specified condition described in
this bulletin.
Draft - Confidential
© 2023 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 4
L-SB-0048-23
October 13, 2023
Page 2 of 4
MIL ON With DTC P05CE00
Parts Information
PART NUMBER
PART NAME
QTY
89661-0EK00
Computer, Engine Control
–
NOTE
The ECM (PCM) should NOT be replaced as part of the Repair Procedure.
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Battery Diagnostic Tool
DCA-8000P_T
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVI*
PART NUMBER
TSADVUNIT
Techstream 2.0
TS2UNIT
ADE
1
Techstream Lite
TSLITEPDLR01
Techstream Lite (Green Cable)
TSLP2DLR01
*Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
GTS+ software version 2023.03.002.02 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
Use Techstream or an approved J2534 interface to perform flash reprogramming updates. Visit
techinfo.toyota.com for more information regarding J2534 reprogramming.
Draft - Confidential
QTY
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0048-23
October 13, 2023
Page 3 of 4
MIL ON With DTC P05CE00
Calibration Information
CALIBRATION ID
MODEL YEAR
MODEL
ENGINE
DRIVE TYPE
PREVIOUS
RX 350 (CBU)
FWD
2023
T24A-FTS
RX 350 (NA)
4WD
8A2224825000
8A2224825100
8A2224825200
8A2220E10000
8A2220E10100
8A2220E10200
8A222-0E11000
8A222-0E11100
8A222-0E11200
NEW
8A2224825300
8A2220E10300
8A2220E11300
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a MIL ON condition with DTC P05CE00 (Cold Start “B” Camshaft
Position Timing Performance Bank 1) present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Use GTS+ to confirm if the ECM (PCM) calibration has been updated.
Is the calibration ID listed in GTS+ the latest ECM (PCM) calibration?
YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to step 3.
Draft - Confidential
© 2023 Lexus, a division of Toyota Motor Sales, USA
L-SB-0048-23
October 13, 2023
Page 4 of 4
MIL ON With DTC P05CE00
Repair Procedure (continued)
3. Flash reprogram the ECM (PCM).
NOTE
The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage
at 13.5V while flash reprogramming the vehicle.
For details on how to use the battery diagnostic station, refer to the DCA-8000 Instruction Manual
located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
Follow the procedures outlined in L-SB-0036-22 GTS+ECU Flash Reprogramming Procedure
With Security Signature, and flash the ECM (PCM) with the NEW calibration
file update.
4. Clear ANY DTCs and test-drive the vehicle in accordance with the driving pattern described in
the confirmation driving pattern to confirm the condition is no longer present.
Refer to TIS, applicable model and model year Repair Manual:
2023 RX 350:
Engine/Hybrid System – Engine Control – “T24A-FTS (Engine Control): SFI System (for
Gasoline Model): P001400, P001500, P05CE00; Camshaft Position “B” – Timing
Over-advanced or System Performance Bank 1”
Draft - Confidential
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TSB/Document ID: L-SB-0048-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-10-13
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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