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Service bulletins for the 2023 Toyota CROWN

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

138 on file from NHTSA, as of 2026-10-19.

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By component

By trouble code

Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
24TC032024-07-23. Service bulletin. ELECTRICAL SYSTEM. The Data Communication Module (DCM), which supports Toyota Connected Services in your vehicle, may not have activated properly during vehicle delivery. This results in all connected services becoming inoperative, including Safety Connect features such as the SOS emergency calling feature.
24TC032024-07-23. Service bulletin. ELECTRICAL SYSTEM. The Data Communication Module (DCM), which supports Toyota Connected Services in your vehicle, may not have activated properly during vehicle delivery. This results in all connected services becoming inoperative, including Safety Connect features such as the SOS emergency calling feature.
24TC032024-07-23. Service bulletin. ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 24TC03 DATA COMMUNICATON MODULE (DCM) UPDATE CERTAIN 2023 COROLLA, COROLLA CROSS, COROLLA HATCHBACK, COROLLA HV, GR COROLLA, CROWN, HIGHLANDER, HIGHLANDER HV, PRIUS, RAV4, RAV4 PRIME, RAV4 HV, VENZA HV
24TC032024-07-23. Service bulletin. ELECTRICAL SYSTEM. The Data Communication Module (DCM), which supports Toyota Connected Services in your vehicle, may not have activated properly during vehicle delivery. This results in all connected services becoming inoperative, including Safety Connect features such as the SOS emergency calling feature.
24TC032024-07-23. Service bulletin. ELECTRICAL SYSTEM. The Data Communication Module (DCM), which supports Toyota Connected Services in your vehicle, may not have activated properly during vehicle delivery. This results in all connected services becoming inoperative, including Safety Connect features such as the SOS emergency calling feature.
T-SB-0120-20 Rev22024-07-06. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Some 2021 – 2024 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit (ECU) is replaced. GTS+ software has been modified to indicate when configuration software is required. A new Configure column has been added to the GTS+ Health Check Results screen to show when configuration software is available for a specific ECU. REVISION NOTICE April 18, 2024 Rev2: •Applicability has been updated to include 2024 model year Tundra, Tundra Hybrid, Venza Hybrid, bZ4X, Corolla, Corolla Cross, Corolla Cross Hybrid, Corolla Hybrid, Crown, GR Corolla, Corolla Hatchback, Prius, Prius Prime, Sequoia Hybrid, Highlander, Grand Highlander, Grand Highlander Hybrid, Land Cruiser, Tacoma, Tacoma Hybrid, and Mirai vehicles and 2023 model year Corolla Hatchback and Prius Prime vehicles. •The Introduction section has been updated. •The Operation Procedure section has been removed. •The Standard ECU Configuration Procedure and ECU Configuration Value Writing Procedure sections have been added.
T-SB-0111-20 Rev22024-07-06. Service bulletin. ELECTRICAL SYSTEM. When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. The GTS+ Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU Security Key. REVISION NOTICE April 11, 2024 Rev2: •Applicability has been updated to include 2023 – 2024 model year 86, Corolla, Corolla Cross, Corolla Cross Hybrid, Crown, GR Corolla, Mirai, Prius, Prius Prime, RAV4 Prime, Sequoia Hybrid, Sienna Hybrid, Tundra, Tundra Hybrid, Venza Hybrid, and Yaris and 2024 model year bZ4X, Highlander, Highlander Hybrid, Grand Highlander, and Grand Highlander Hybrid vehicles. •The entire bulletin has been updated to represent GTS+ Software. July 08, 2022 Rev1: •Applicability has been updated to include 2022 model year 86, Corolla Cross, Mirai, Tundra, and Tundra Hybrid vehicles and 2023 model year bZ4X vehicles. Any previous printed versions of this bulletin should be discarded.
T-SB-0120-20 Rev22024-07-06. Service bulletin. ENGINE; ELECTRICAL SYSTEM. Some 2021 – 2024 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit (ECU) is replaced. GTS+ software has been modified to indicate when configuration software is required. A new Configure column has been added to the GTS+ Health Check Results screen to show when configuration software is available for a specific ECU. REVISION NOTICE April 18, 2024 Rev2: •Applicability has been updated to include 2024 model year Tundra, Tundra Hybrid, Venza Hybrid, bZ4X, Corolla, Corolla Cross, Corolla Cross Hybrid, Corolla Hybrid, Crown, GR Corolla, Corolla Hatchback, Prius, Prius Prime, Sequoia Hybrid, Highlander, Grand Highlander, Grand Highlander Hybrid, Land Cruiser, Tacoma, Tacoma Hybrid, and Mirai vehicles and 2023 model year Corolla Hatchback and Prius Prime vehicles. •The Introduction section has been updated. •The Operation Procedure section has been removed. •The Standard ECU Configuration Procedure and ECU Configuration Value Writing Procedure sections have been added.
T-SB-0111-20 Rev22024-07-06. Service bulletin. ELECTRICAL SYSTEM. When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. The GTS+ Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU Security Key. REVISION NOTICE April 11, 2024 Rev2: •Applicability has been updated to include 2023 – 2024 model year 86, Corolla, Corolla Cross, Corolla Cross Hybrid, Crown, GR Corolla, Mirai, Prius, Prius Prime, RAV4 Prime, Sequoia Hybrid, Sienna Hybrid, Tundra, Tundra Hybrid, Venza Hybrid, and Yaris and 2024 model year bZ4X, Highlander, Highlander Hybrid, Grand Highlander, and Grand Highlander Hybrid vehicles. •The entire bulletin has been updated to represent GTS+ Software. July 08, 2022 Rev1: •Applicability has been updated to include 2022 model year 86, Corolla Cross, Mirai, Tundra, and Tundra Hybrid vehicles and 2023 model year bZ4X vehicles. Any previous printed versions of this bulletin should be discarded.
Toyota Second Ke2024-04-15. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. The table describes the phases currently planned for the Second Key Delivery Program and the estimated timing of announcement. This table will be updated during each phase launch and as more details become available.
23TJ01_P5_Dealer2024-04-15. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. DP: The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
T-SB-0014-242024-04-15. Service bulletin. ELECTRICAL SYSTEM. TSB: Some 2023 model year Crown vehicles may exhibit a delay and/or reduction in output of warm air from the HVAC system while the vehicle engine is at normal operating temperatures (over 170°F). This condition usually occurs immediately after a hot restart, while the vehicle is in Ready ON, but before the internal combustion engine starts. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition.
T-SB-0013-242024-04-15. Service bulletin. ELECTRICAL SYSTEM. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
TSB0104212024-04-01. Service bulletin. SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:COOLING SYSTEM; LANE DEPARTURE. TSB: Some 2018 ? 2024 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, M20A-FKS, or M20A-FXS engine may exhibit one or more of the following conditions: ?Milky/discolored engine oil. ?An ?Oil Pressure Low? warning message on the Multi-information Display (MID). ?A MIL ON condition with Diagnostic Trouble Codes (DTCs) P05202A (Engine Oil Pressure Sensor/Switch ?A? Signal Stuck in Range) and/or P052477 (Engine Oil Pressure Too Low [Severe]) present. Moisture from blow-by gases condenses and accumulates in the engine oil during short trips in extreme cold weather. When the moisture in the oil freezes, the oil pressure may drop, and the aforementioned warning indicators may display. Follow the procedures in this bulletin to address these conditions.
Current Phase Ti2024-03-04. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. The table describes the phases currently planned for the Second Key Delivery Program and the estimated timing of announcement. This table will be updated during each phase launch and as more details become available.
Dealer Packet2024-03-04. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. DP: The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
Dealer Letter2024-03-04. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. DP: The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
TTT074023A2024-01-29. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TT: Some 2023MY Crown Platinum grade ONLY may require a transaxle and transmission control module (TCU) replacement for low-speed vibration from Transaxle and/or DTC for P084000/P084087.
TSB0101232024-01-29. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. TSB: 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.
TTT0740232024-01-29. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. TT: Some 2023MY Crown Platinum grade ONLY may require a transaxle and transmission control module (TCU) replacement for low-speed vibration from Transaxle and/or DTC for P084000/P084087.
23TJ01P5_TI_Publ2024-01-16. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. TI: TECHNICAL INSTRUCTIONS FOR 23TJ01 Second Key Delivery Program Multiple Models and Model Years
23TJ01P5_RL_Publ2024-01-16. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. RL: The supply of Smart Keys available for Toyota vehicles has been temporarily limited to one (1) on select models since October 2022 due to global semiconductor shortages impacting certain microchips. Affected vehicles have been delivered with only one Smart Key and a second mechanical key.
23TJ01_P5_Dealer2024-01-16. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. DP: The subject vehicles were delivered with only one (1) Smart Key on select models since October 2022 due to a global semiconductor shortage impacting certain microchips. The affected vehicles were delivered with one (1) Smart Key and a second mechanical key.
23TJ01P4C2023-12-26. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. TI: TECHNICAL INSTRUCTIONS FOR 23TJ01 Second Key Delivery Program Multiple Models and Model Years
23TJ01P4B2023-12-26. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER; ELECTRICAL SYSTEM. RL: The supply of Smart Keys available for Toyota vehicles has been temporarily limited to one (1) on select models since October 2022 due to global semiconductor shortages impacting certain microchips. Affected vehicles have been delivered with only one Smart Key and a second mechanical key.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.