# Service bulletin T\-TT\-0553\-19

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: 10164352
- Published by NHTSA: 2019\-09\-03
- Manufacturer's number: T\-TT\-0553\-19
- Manufacturer's date: 2019\-07\-16
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT

## NHTSA's summary

TT: The new DCA\-8000 Diagnostic Charger may cause your facility?s Ground Fault Circuit Interrupter \(GFCI\) breaker to trip. A GFCI breaker can be tripped for various reasons, one of the reasons may be related to the DCA\-8000. We are investigating this issue to determine the root cause. Other reasons the GFCI breaker may trip ? Circuit demand is too high for GFCI rating ? Worn out GFCI internal contacts ? Improper installation or wiring of GFCI breaker

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10164352-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10164352-9999.pdf)

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

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- 2017 to 2020 TOYOTA 4RUNNER
- 2017 to 2020 TOYOTA 86
- 2017 to 2020 TOYOTA AVALON
- 2017 TOYOTA C\-HR
- 2018 to 2020 TOYOTA C\-HR
- 2017 to 2020 TOYOTA CAMRY
- 2017 to 2019 TOYOTA COROLLA
- 2020 TOYOTA COROLLA HATCHBACK
- 2020 TOYOTA COROLLA HYBRID
- 2017 to 2020 TOYOTA HIGHLANDER
- 2017 to 2019 TOYOTA LAND CRUISER
- 2017 to 2020 TOYOTA MIRAI
- 2017 to 2020 TOYOTA PRIUS
- 2017 to 2020 TOYOTA PRIUS C
- 2019 to 2020 TOYOTA PRIUS PRIME
- 2017 TOYOTA PRIUS V
- 2018 TOYOTA PRIUS V
- 2017 to 2020 TOYOTA RAV4
- 2017 to 2020 TOYOTA RAV4 HYBRID
- 2017 to 2020 TOYOTA SEQUOIA
- 2017 to 2020 TOYOTA SIENNA
- 2020 TOYOTA SUPRA
- 2017 to 2020 TOYOTA TACOMA
- 2017 to 2020 TOYOTA TUNDRA
- 2017 to 2019 TOYOTA YARIS

## 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
- [21V688000](/recalls/nhtsa/21V688000.md), 2021-09-02: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM:WIRING
- [20V410000](/recalls/nhtsa/20V410000.md), 2020-07-15: EXTERIOR LIGHTING:TURN SIGNAL; ELECTRICAL SYSTEM:WIRING
- [2020284](/recalls/tc/2020284.md), 2020-06-25: Electrical
- [2020149](/recalls/tc/2020149.md), 2020-04-08: Electrical

## 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/10164352](/v1/bulletins/10164352)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20T-TT-0553-19&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10164352&vehicle=Service%20bulletin%20T-TT-0553-19)