Toyota bulletin 24TC03
What it saysThe Data Communication Module (DCM), which supports Toyota Connected Services in your vehicle, may not have activated properly during vehicle delivery. NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Jun 10, 2024, received Jul 23, 2024, about the electrical system — 6 documents under this number. It names 8 model years (2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThe 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.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005107 | |
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005103 | |
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005102 | |
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005049 | |
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005045 | |
| 24TC03 | Service bulletin | Jun 10, 2024 | 11005044 |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 24TC03R1 | DCM OTA Reflash | 0.8 hrs |
Read by machine from the document NHTSA serves (9 pages), read Sep 30, 2026. A part number is shown only where it matches Toyota’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 8 model years this bulletin names have filed 762 complaints with NHTSA since 2015. 188 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2023 Toyota RAV4 Prime, the 15 owners who gave an odometer reading for Electrical System reported it at a median of 39,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
I own a 2023 Toyota RAV4 XSE that currently has an active safety recall related to the instrument cluster/speedometer display going blank. My vehicle is experiencing this issue — the speedometer/instrument screen has gone completely blank, preventing me from seeing my speed, warning lights, or critical vehicle information while driving.
2023 Toyota RAV4 Prime · Electrical System · filed with NHTSA Feb 9, 2026 · ODI 11716664
The digital instrument cluster display failed completely while the vehicle was in operation. The speedometer, warning indicators, and safety alerts were not visible, making it unsafe to drive due to inability to monitor speed or receive critical warnings. There were no prior warning messages before the failure occurred.
2023 Toyota RAV4 Prime · Electrical System · filed with NHTSA Feb 6, 2026 · ODI 11716205
The contact owns a 2023 Toyota Crown. The contact stated that the instrument panel screen had turned blank. The contact received the recall notification of NHTSA Campaign Number: 25V595000(Electrical System). The vehicle was taken to the local dealer, who confirmed that the recall remedy parts were not available.
2023 Toyota Crown · Electrical System · filed with NHTSA Dec 31, 2025 · ODI 11708080
In depth: 2023 Toyota Corolla Cross electrical problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group71 other manufacturer communications filed against these Toyota models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 26TC01 | Service campaign | Sep 8, 2026 | An electrical connection for the rear window defogger may not have been installed correctly during vehicle assembly. Overtime, this can caus… |
| T-SB-0050-26 | Over-the-air update | Aug 19, 2026 | A head unit software update (version 8612G42397) is now available for 2026 model year RAV4 Hybrid, and RAV4 Plug-in Hybrid vehicles via OTA… |
| T-TT-0803-26 | Service bulletin | May 21, 2026 | Some 26MY RAV4 HV/PHV vehicles with HU (head unit) versions 1136 or older may exhibit one or more of theintermittent conditions below: • No… |
| T-TT-0800-26 | Service bulletin | May 20, 2026 | Some 2026 RAV4 HV vehicles may display a Distance to Empty (DTE) that is higher than expected at initial fill-up. The DTE is computed using… |
| 22TE09 | Warranty extension | May 14, 2026 | Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36… |
| T-SB-0029-26 | Over-the-air update | Apr 24, 2026 | A new head unit software update is available for 2023 – 2024 model year RAV4, RAV4 Hybrid, and RAV4 Prime vehicles equipped with Toyota Mult… |
| T-SB-0021-26 | Service bulletin | Mar 18, 2026 | Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due… |
| T-TT-0798-26 | Service bulletin | Feb 4, 2026 | Some systems such as remote engine start and remote door lock/unlock may be inoperative if they are not enabled/registered after ECU replace… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Toyota, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Toyota 24TC03 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 24TC03 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Toyota warranty extension on file lists the ones Toyota has filed.
Which vehicles does 24TC03 cover?
The manufacturer filed it against 8 model years: 2023 Toyota Corolla, 2023 Toyota Corolla Cross, 2023 Toyota Crown, 2023 Toyota Highlander, 2023 Toyota Prius, 2023 Toyota RAV4 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.