# Service bulletin T\-TT\-0578\-19 Rev

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.

- Type: Service bulletin
- NHTSA id: 10182983
- Published by NHTSA: 2020\-11\-23
- Manufacturer's number: T\-TT\-0578\-19 Rev
- Manufacturer's date: 2020\-10\-12
- NHTSA component: STEERING; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

## NHTSA's summary

TT: Some customers may encounter Bluetooth® connectivity concerns such as: ?Difficulty to pair the phone. ?Intermittent Bluetooth® failure to connect to the vehicle when first turning on the vehicle. ?Various Bluetooth® Audio functions are no longer functioning with customer?s phone such as ability to change the track using the steering wheel controls. These concerns can be caused by changes made on the customer?s phone. Make sure to inquire with the customer if the connectivity concerns occurred after receiving an operating system update on their phone, or if they have restored their phone data/settings recently.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10182983-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10182983-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories, Steering

## Vehicles listed

- 2006 to 2020 TOYOTA 4RUNNER
- 2017 to 2020 TOYOTA 86
- 2009 to 2020 TOYOTA AVALON
- 2018 to 2020 TOYOTA C\-HR
- 2007 to 2020 TOYOTA CAMRY
- 2009 to 2020 TOYOTA COROLLA
- 2019 to 2020 TOYOTA COROLLA HATCHBACK
- 2017 to 2018 TOYOTA COROLLA IM
- 2011 to 2014 TOYOTA FJ CRUISER
- 2004 to 2020 TOYOTA HIGHLANDER
- 2004 to 2011 TOYOTA LAND CRUISER
- 2013 to 2020 TOYOTA LAND CRUISER
- 2009 to 2014 TOYOTA MATRIX
- 2016 to 2020 TOYOTA MIRAI
- 2004 to 2020 TOYOTA PRIUS
- 2012 to 2020 TOYOTA PRIUS C
- 2017 to 2020 TOYOTA PRIUS PRIME
- 2012 to 2017 TOYOTA PRIUS V
- 2018 TOYOTA PRIUS V
- 2009 to 2020 TOYOTA RAV4
- 2012 to 2014 TOYOTA RAV4 EV
- 2017 TOYOTA RAV4 HYBRID
- 2006 to 2020 TOYOTA SEQUOIA
- 2006 to 2020 TOYOTA SIENNA
- 2020 TOYOTA SUPRA
- 2009 to 2020 TOYOTA TACOMA
- 2007 to 2020 TOYOTA TUNDRA
- 2009 to 2016 TOYOTA VENZA
- 2013 to 2020 TOYOTA YARIS
- 2017 to 2018 TOYOTA YARIS IA
- 2016 TOYOTA redundant RAV4 HV

## Recalls for the same vehicles and component

- [25V876000](/recalls/nhtsa/25V876000.md), 2025-12-17: EQUIPMENT ADAPTIVE/MOBILITY:WHEELCHAIR RESTRAINTS/SECUREMENT:LATCH/ANCHOR:
- [25V636000](/recalls/nhtsa/25V636000.md), 2025-09-23: ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY
- [2023589](/recalls/tc/2023589.md), 2023-11-01: Electrical
- [23V734000](/recalls/nhtsa/23V734000.md), 2023-11-01: ELECTRICAL SYSTEM:12V/24V/48V BATTERY
- [22V480000](/recalls/nhtsa/22V480000.md), 2022-07-06: EQUIPMENT:OTHER:LABELS
- [2021723](/recalls/tc/2021723.md), 2021-11-24: Electrical
- [2021718](/recalls/tc/2021718.md), 2021-11-23: Steering
- [21V920000](/recalls/nhtsa/21V920000.md), 2021-11-23: STEERING:HYDRAULIC POWER ASSIST SYSTEM; STEERING:RACK AND PINION
- [21V688000](/recalls/nhtsa/21V688000.md), 2021-09-02: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:WIRING
- [20V734000](/recalls/nhtsa/20V734000.md), 2020-11-25: AIR BAGS:FRONTAL; STEERING:COLUMN

## Other bulletins for the same vehicles and component

- [22TE09](/bulletins/11033412.md), 2026-06-04, Warranty extension: ELECTRICAL SYSTEM. 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 36,000 miles \(whichever comes first\), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start.
- [T\-SB\-0021\-26](/bulletins/11031158.md), 2026-04-08, Service bulletin: ELECTRICAL SYSTEM. Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the rear underbody air conditioner tube and accessory assembly. The anti\-corrosion material has been updated to reduce the possibility of this condition.
- [T\-SB\-0106\-22 Rev2](/bulletins/11028726.md), 2026-02-11, Service bulletin: ELECTRICAL SYSTEM. OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T\-SB\-0001\-26.
- [T\-SB\-0001\-26](/bulletins/11028722.md), 2026-02-11, Service bulletin: ELECTRICAL SYSTEM. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool \(SST\) USB flash drive to update the map, points of interest, and system software.
- [T\-TT\-0797\-26](/bulletins/11028713.md), 2026-02-11, Service bulletin: ELECTRICAL SYSTEM. Some RAV4 vehicles power seat where the automatic seat adjustment by the memory function does not work.
- [22TE09](/bulletins/11028711.md), 2026-02-11, Warranty extension: ELECTRICAL SYSTEM. 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 36,000 miles \(whichever comes first\), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start.
- [25TD01](/bulletins/11024098.md), 2025-10-08, Service campaign: ELECTRICAL SYSTEM. The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially enter the HV Floor Underwire connector housing and could cause corrosion over time. Excessive corrosion could cause AM Radio Static during certain driving cycles, or the vehicle may not start.
- [25TD01](/bulletins/11024097.md), 2025-10-08, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR 25TD01 REAR TRACTION MOTOR CABLE CORROSION CERTAIN 2019 \- 2024 RAV4 HV \(AWD\), 2021\- 2024 RAV4 PRIME, 2020\-2024 HIGHLANDER HV \(AWD\), 2021\-2024 VENZA HV, 2023\-2024 CROWN HV VEHICLES
- [25TD01](/bulletins/11024096.md), 2025-10-08, Service campaign: ELECTRICAL SYSTEM. The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially enter the HV Floor Underwire connector housing and could cause corrosion over time. Excessive corrosion could cause AM Radio Static during certain driving cycles, or the vehicle may not start.
- [25TD01](/bulletins/11024090.md), 2025-10-08, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR 25TD01 REAR TRACTION MOTOR CABLE CORROSION CERTAIN 2019 \- 2024 RAV4 HV \(AWD\) 2021\- 2024 RAV4 PRIME 2020\-2024 HIGHLANDER HV \(AWD\) 2021\-2024 VENZA HV 2023\-2024 CROWN HV

JSON: [/v1/bulletins/10182983](/v1/bulletins/10182983)

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