TSB010123

T-SB-0101-23
December 20, 2023
MIL ON With DTC P2C9000
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2023
Crown
VDS(s): AFAAF
Engine(s): T24
Introduction
Some 2023 model year Crown vehicles may exhibit a MIL ON condition with Diagnostic Trouble
Code (DTC) P2C9000 (Crankcase Ventilation System - Hose A Disconnected) present without any
related hoses disconnected. 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.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VIN
shown below.
MODEL YEAR
MODEL
ENGINE
PRODUCTION CHANGE EFFECTIVE VIN
2023
Crown
T24A-FTS
JTDAFAAF5P3004503
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL2320
Reprogram the ECM (PCM)
0.7
89661-4D650
8A
74
APPLICABLE WARRANTY
 This repair is covered under the Toyota 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.
© 2023 Toyota Motor Sales, USA
Page 1 of 3
T-SB-0101-23
December 20, 2023
Page 2 of 3
MIL ON With DTC P2C9000
Parts Information
PART NUMBER
PART NAME
QTY
89661-4D650
Computer, Engine Control
1
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
PART NUMBER
Techstream ADVI*
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 2023.04.003.02 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.
Calibration Information
CALIBRATION ID
MODEL YEAR
MODEL
ENGINE
PREVIOUS
NEW
8A2223009200
2023
Crown
QTY
T24A-FTS
8A2223009100
8A2223009000
© 2023 Toyota Motor Sales, USA
8A2223009300
T-SB-0101-23
December 20, 2023
Page 3 of 3
MIL ON With DTC P2C9000
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a MIL ON condition with the DTC P2C9000 (Crankcase Ventilation
System – Hose A Disconnected) present without ANY related hoses disconnected?

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Diagnose the DTC P2C9000.
Refer to TIS, applicable model and model year Repair Manual:

2023 Crown:
Engine/Hybrid System – Engine Control – “T24A-FTS (Engine Control): SFI System:
P2C9000; Crankcase Ventilation System – Hose “A” Disconnected”
Does the diagnosis indicate ANY of the procedure steps in the Repair Manual as the cause?

YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

NO — Continue to step 3.
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 T-SB-0107-20 GTS+ ECU Flash Reprogramming With
Security Signature, and flash the ECM (PCM) with the NEW calibration file update.
4. Using GTS+, 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 Crown:
Engine/Hybrid System – Engine Control – “T24A-FTS (Engine Control): SFI System:
P2C9000; Crankcase Ventilation System – Hose “A” Disconnected”
© 2023 Toyota Motor Sales, USA