# Service bulletin T\-SB\-0066\-20 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: 10182969
- Published by NHTSA: 2020\-11\-23
- Manufacturer's number: T\-SB\-0066\-20 Rev
- Manufacturer's date: 2020\-10\-06
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT

## NHTSA's summary

TSB: Some 2020 model year vehicles equipped with Audio Plus \(version 1021\) or Premium Audio \(version 1021\) or earlier may exhibit one or more of the following conditions: ?Barge in function defaulted to OFF. ?Limited phone book grammar. ?Difficult Hand Free operation. ?Abnormal Electronic Owner?s Manual operation ?Music does not automatically resume when using Android Auto?. ?Cover art is not displayed. ?Vehicle position is not sent to Destination Assist server. ?System inoperative after using the return button when using voice recognition. Some 2020 model year vehicles equipped with Audio Plus \(version 1035\) or Premium Audio \(version 1035\) or earlier may exhibit one or both of the following conditions: ?Abnormal screen play while using Apple CarPlay® \(primarily during phone calls\). ?Poor sound quality during phone calls while using Apple CarPlay®. Some 2020 model year vehicles equipped with Audio Plus \(version 1047\) or Premium Audio \(version 1047\) or earlier may exhibit one or more of the following conditions: ?USB audio does not resume after ignition cycle. ?Intermittent rebooting. ?Bluetooth disconnecting during a phone call when using Apple CarPlay®. ?Intermittent screen freezing. ?Navigation intermittently will not boot up. ?Home Screen Audio widget is blank after a Destination Assist call. ?Song, artist, or album data missing. ?Abnormal clock operation. ?Apple CarPlay® intermittently inoperative. ?Radio takes a long time to boot up. Some 2020 model year vehicles equipped with Audio Plus \(version 1060\) or Premium Audio \(version 1060\) or earlier may exhibit the following concern: ?Distorted screen when using Apple CarPlay® while making a hands\-free phone call. A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10182969-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10182969-9999.pdf)

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

## Components

Electrical system, Equipment and accessories

## Vehicles listed

- 2020 TOYOTA 4RUNNER
- 2020 TOYOTA CAMRY
- 2020 TOYOTA CAMRY HYBRID
- 2020 TOYOTA HIGHLANDER
- 2020 TOYOTA HIGHLANDER HYBRID
- 2020 TOYOTA SEQUOIA
- 2020 TOYOTA TUNDRA
- 2021 TOYOTA VENZA HYBRID

## Recalls for the same vehicles and component

- [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

## 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.
- [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
- [25TD01](/bulletins/11024089.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.

JSON: [/v1/bulletins/10182969](/v1/bulletins/10182969)

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