Toyota bulletin 22TC01 Technical
What it saysTI: technical instructions for 22TC01 data communication module (DCM) reprogramming certain 2021 model year C-HR, RAV4 prime, tundra certain 2021-2022 4RUNNER, highlander, highlander HV, prius prime, sequoia, tacoma… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Oct 18, 2023, received Mar 14, 2022, about the electrical system — 3 documents under this number. It names 14 model years (2021–2022). 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 communicationTI: TECHNICAL INSTRUCTIONS FOR 22TC01 DATA COMMUNICATION MODULE (DCM) REPROGRAMMING CERTAIN 2021 MODEL YEAR C-HR, RAV4 PRIME, TUNDRA CERTAIN 2021-2022 4RUNNER, HIGHLANDER, HIGHLANDER HV, PRIUS PRIME, SEQUOIA, TACOMA CERTAIN 2022 PRIUS
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 22TC01 Technical | Service bulletin | Oct 18, 2023 | 10245474 | not found |
| 22TC01 Technical | Service bulletin | Apr 27, 2022 | 10211819 | not found |
| 22TC01 Technical | Service bulletin | Feb 24, 2022 | 10209017 | not found |
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 14 model years this bulletin names have filed 1,243 complaints with NHTSA since 2015. 66 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.
The contact owns a 2021 Toyota Highlander Hybrid. The contact stated that upon starting the vehicle, the instrument panel lights were flashing. The vehicle then independently turned off and restarted repeatedly. The vehicle was towed to the dealer, where it was determined that the battery level was low and needed to be replaced.
2021 Toyota Highlander · Electrical System · filed with NHTSA Feb 26, 2026 · ODI 11720641
When I turn the key to crank my radio doesn’t come on , A/C won’t blow and I have to jiggle the keys or restart it to end the issue. My husband has witnessed thi happen many times. Scared I might have an electrical issue. Contact me back for assistance to me for this issue please. It doesn’t happen every time either
2021 Toyota Tundra · Electrical System · filed with NHTSA Oct 11, 2025 · ODI 11692748
The contact owns a 2021 Toyota C-HR. The contact stated that while driving at an undisclosed speed, several unknown warning lights were illuminated. Additionally, the message "Service Vehicle Now" was displayed. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure.
2021 Toyota C-HR · Electrical System · filed with NHTSA Jan 24, 2025 · ODI 11638283
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 group69 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… |
| 26TC02 | Service campaign | Jun 25, 2026 | After calibrating a trailer and using the Trailer Backup Guide feature, subsequent use of this feature may result in a “Trailer not detected… |
| 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-SB-0016-26 | Service bulletin | Feb 26, 2026 | Some 2024 – 2026 model year Tacoma vehicles may exhibit a “chirp” noise from the HVAC magnetic clutch upon engagement. |
| T-SB-0106-22 OBSOLETE | Service bulletin | Jan 30, 2026 | OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26. |
| T-SB-0001-26 | Service bulletin | Jan 28, 2026 | Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool… |
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 22TC01 Technical 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 22TC01 Technical 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 22TC01 Technical cover?
The manufacturer filed it against 14 model years: 2022 Toyota 4Runner, 2021 Toyota 4Runner, 2021 Toyota C-HR, 2022 Toyota Highlander, 2021 Toyota Highlander, 2022 Toyota Prius and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.