# Service bulletin HOY Region Email

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: 10146502
- Published by NHTSA: 2018\-11\-05
- Manufacturer's number: HOY Region Email
- Manufacturer's date: 2017\-12\-20
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Region Email: The subject vehicles are voluntarily equipped with an event data recorder \(EDR\). The EDR only collects, stores, and allows retrieval of vehicle event data, including crash events. It does not control the operation of the vehicle or crash safety systems. Due to a software error in the air bag ECU where EDR data is stored, the EDR data for ?Frontal Airbag Deployment, Time to 1st Stage Deployment,? and ?Frontal Airbag Deployment Time to 2nd Stage Deployment,? will show the same value at the time an event is recorded. This software error has no effect on the actual air bag?s deployment times for both stages. Both air bags operate as designed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10146502-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10146502-0001.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2018 TOYOTA SEQUOIA
- 2018 TOYOTA TUNDRA

## Recalls for the same vehicles and component

- [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
- [18V685000](/recalls/nhtsa/18V685000.md), 2018-10-04: ELECTRICAL SYSTEM:SOFTWARE; AIR BAGS
- [2018100](/recalls/tc/2018100.md), 2018-02-21: Electrical

## Other bulletins for the same vehicles and component

- [T\-TT\-0790\-25](/bulletins/11022964.md), 2025-09-09, Service bulletin: ELECTRICAL SYSTEM. Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free. This is caused by the phone Hands Free volume being too low.
- [T\-SB\-0058\-23 Rev1](/bulletins/11020657.md), 2025-07-10, Service campaign: ELECTRICAL SYSTEM. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
- [TSB002620](/bulletins/10247828.md), 2023-12-26, Service bulletin: UNKNOWN OR OTHER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE; FORWARD COLLISION AVOIDANCE; AIR BAGS. TSB: All 2020 ? 2023 model year 4Runner, 2018 ? 2022 model year Sequoia, 2018 ? 2023 model year Tacoma, and 2018 ? 2021 model year Tundra vehicles are equipped with Pre\-collision System \(PCS\) and Dynamic Radar Cruise Control \(DRCC\) as part of the Toyota Safety Sense \(TSS\) package. The PCS and DRCC systems are designed to help mitigate a potential collision and maintain a pre\-determined traveling distance. It is recommended to disable the PCS and DRCC systems on vehicles that have been modified \(ride height, oversized wheels/tires, brush bars, etc.\) in a way that potentially disrupts the functionality of these systems. Vehicle owner?s written consent is required before performing the calibration to permanently disable the PCS and DRCC systems. Follow the Repair Procedure in this bulletin to disable the PCS and DRCC systems.
- [T\-SB\-0057\-18](/bulletins/10238157.md), 2023-06-26, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. TSB: The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system.
- [TSB004522Rev1](/bulletins/10224102.md), 2022-10-17, Service bulletin: PARKING BRAKE; ELECTRICAL SYSTEM; AIR BAGS. TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 01013E\), Entune? Audio Plus \(version 010156 or 01015C\), or Entune? Premium Audio \(versions 010171, 010170, or 01017D\) may exhibit one or more of the following conditions: ?Head unit reboots at a specific location. ?Abnormal Destination Search app operation. ?Rebooting caused by no songs on the USB\-connected iPhone. ?A one\-time reboot after ignition is cycled to ACC\-ON. ?Audio stays muted after the key is cycled. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 010144\), Entune? Audio Plus \(version 01015E\), Entune? Premium Audio \(version 010182\), or earlier may exhibit one or more of the following conditions: ?Head unit reboots intermittently. ?Home screen intermittently half blank after shifting out of reverse, if the driver uses reverse after using the maintenance reminder screen. ?Screen freezes during an incoming phone call. ?Incorrect time displays on the diagnostic menu. ?Radio station information does not match the radio station that is playing.?Abnormal playlist browsing operation. ?Mute stays enabled after key cycle. ??Search along my route? is inoperative. ?Traffic data scales improperly. ?Unit of measure is missing from distance to destination \(showing ?11? instead of ?11mi/km?\). ?Multi\-information display \(MID\) compass does not match navigation screen when switching to North up. ?Navigation does not match MID when switching from miles to kilometers. ?Speed limit is blank on navigation screen. ?Go button on VR screen is inoperative. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 010145\), Entune? Audio Plus \(version 010161\), Entune? Premium Audio \(version 010189\), or earlier may exhibit one of the following conditions: ?Map will not display after it has been reprogrammed from the map micro SD card. Updated system software is now
- [TSB004522Rev1](/bulletins/10220177.md), 2022-09-15, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. TSB: Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 01013E\), Entune? Audio Plus \(version 010156 or 01015C\), or Entune? Premium Audio \(versions 010171, 010170, or 01017D\) may exhibit one or more of the following conditions: ?Head unit reboots at a specific location. ?Abnormal Destination Search app operation. ?Rebooting caused by no songs on the USB\-connected iPhone. ?A one\-time reboot after ignition is cycled to ACC\-ON. ?Audio stays muted after the key is cycled.
- [T\-SB\-0045\-22](/bulletins/10211830.md), 2022-05-16, Service bulletin: VEHICLE SPEED CONTROL; ELECTRICAL SYSTEM; EQUIPMENT. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 01013E\), Entune? Audio Plus \(version 010156 or 01015C\), or Entune? Premium Audio \(versions 010171, 010170, or 01017D\) may exhibit one or more of the following conditions: ?Head unit reboots at a specific location. ?Abnormal Destination Search app operation. ?Rebooting caused by no songs on the USB\-connected iPhone. ?A one\-time reboot after ignition is cycled to ACC\-ON. ?Audio stays muted after the key is cycled. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 010144\), Entune? Audio Plus \(version 01015E\), Entune? Premium Audio \(version 010182\), or earlier may exhibit one or more of the following conditions: ?Head unit reboots intermittently. ?Home screen intermittently half blank after shifting out of reverse, if the driver uses reverse after using the maintenance reminder screen. ?Screen freezes during an incoming phone call. ?Incorrect time displays on the diagnostic menu. ?Radio station information does not match the radio station that is playing.?Abnormal playlist browsing operation. ?Mute stays enabled after key cycle. ??Search along my route? is inoperative. ?Traffic data scales improperly. ?Unit of measure is missing from distance to destination \(showing ?11? instead of ?11mi/km?\). ?Multi\-information display \(MID\) compass does not match navigation screen when switching to North up. ?Navigation does not match MID when switching from miles to kilometers. ?Speed limit is blank on navigation screen. ?Go button on VR screen is inoperative. Some 2016 ? 2018 model year Toyota vehicles equipped with Entune? Audio \(version 010145\), Entune? Audio Plus \(version 010161\), Entune? Premium Audio \(version 010189\), or earlier may exhibit one of the following conditions: ?Map will not display after it has been reprogrammed from the map micro SD card. Updated system software is now avail
- [T\-TT\-0687\-22](/bulletins/10210373.md), 2022-04-18, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: When customers have a concern about a discharged battery, no start, or general battery concern, the DCA\-8000 is the only appropriate tool to use for diagnosis
- [T\-SB\-0003\-22](/bulletins/10207963.md), 2022-02-14, Service bulletin: ELECTRICAL SYSTEM:WIRING. TSB This Service Bulletin includes guidelines meant to help determine whether to repair or replace a wire harness assembly based on damage type. This Service Bulletin should be used in conjunction with the applicable model and model year Electronic Wiring Diagram \(EWD\) and/or Repair Manual.
- [K0B\-MAC\-032819](/bulletins/10197445.md), 2021-06-14, Service bulletin: FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: RADAR; ELECTRICAL SYSTEM:SOFTWARE. Based on the inspection results in the K0B technical instructions, the millimeter wave radar sensor may require replacement.

JSON: [/v1/bulletins/10146502](/v1/bulletins/10146502)

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