# Service bulletin A21100B

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: 10202598
- Published by NHTSA: 2021\-10\-28
- Manufacturer's number: A21100B
- Manufacturer's date: 2021\-10\-22
- NHTSA component: SEATS; AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; AIR BAGS

## NHTSA's summary

ServiceNews Article \- There are several possible causes for the SRS DTC U3000\-49 \(Internal Failure of the SRS Unit\) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step\-by\-step process in isolating the faulty component. In most situations, the SRS Unit should be last on the list of components to replace. Here is a quick tip for troubleshooting a faulty seat weight sensor.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202598-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202598-9999.pdf)

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

## Components

Air bags, Seats

## Trouble codes named

U3000

## Vehicles listed

- 2020 HONDA ACCORD
- 2020 HONDA CIVIC
- 2020 HONDA CLARITY ELECTRIC
- 2020 HONDA CLARITY FUEL CELL
- 2020 HONDA CLARITY PLUG\-IN HYBRID
- 2020 HONDA CR\-V
- 2020 HONDA FIT
- 2020 HONDA HR\-V
- 2020 HONDA INSIGHT
- 2020 HONDA ODYSSEY
- 2020 HONDA PASSPORT
- 2020 HONDA PILOT
- 2020 HONDA RIDGELINE

## Recalls for the same vehicles and component

- [2026251](/recalls/tc/2026251.md), 2026-05-21: Seats And Restraints
- [26V332000](/recalls/nhtsa/26V332000.md), 2026-05-21: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
- [2026181](/recalls/tc/2026181.md), 2026-04-09: Seats And Restraints
- [26V227000](/recalls/nhtsa/26V227000.md), 2026-04-09: AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE:SOFTWARE
- [2024059](/recalls/tc/2024059.md), 2024-02-01: Airbag
- [24V064000](/recalls/nhtsa/24V064000.md), 2024-02-01: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
- [2023127](/recalls/tc/2023127.md), 2023-03-09: Seats And Restraints

## Other bulletins for the same vehicles and component

- [A19\-024](/bulletins/10234579.md), 2023-04-20, Service bulletin: SEATS. Service Bulletin \- There is a loud buzzing or whining when adjusting the driver’s or front passenger’s seat forward and backward. This is due to the issue that the flex cable in the seat adjustment mechanism is not correctly lubricated.
- [ATI\&01172023](/bulletins/10230590.md), 2023-01-25, Service bulletin: SEATS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&01032023903](/bulletins/10229681.md), 2023-01-11, Service bulletin: SEATS; SEATS:MID/REAR ASSEMBLY:HEAD RESTRAINT. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&12132022905](/bulletins/10228198.md), 2022-12-21, Service bulletin: SEATS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&11282022908](/bulletins/10227234.md), 2022-12-06, Service bulletin: SEATS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&11122022903](/bulletins/10226205.md), 2022-11-15, Service bulletin: SEATS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [ATI\&10272022901](/bulletins/10225473.md), 2022-11-01, Service bulletin: SEATS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2020\-2022 Pilots with a customer complaint of the driver’s side 3rd row headrest not staying upright. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.
- [A21100B](/bulletins/10206988.md), 2022-02-04, Service bulletin: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT. ServiceNews Article \- There are several possible causes for the SRS DTC U3000\-49 \(Internal Failure of the SRS Unit\) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step\-by\-step process in isolating the faulty component. In most situations, the SRS Unit should be last on the list of components to replace. Here is a quick tip for troubleshooting a faulty seat weight sensor.
- [A21100B](/bulletins/10206395.md), 2022-01-11, Service bulletin: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; SEATS. ServiceNews Article \- There are several possible causes for the SRS DTC U3000\-49 \(Internal Failure of the SRS Unit\) to be stored. If you can duplicate the DTC, the troubleshooting will take you through the step\-by\-step process in isolating the faulty component. In most situations, the SRS Unit should be last on the list of components to replace. Here is a quick tip for troubleshooting a faulty seat weight sensor.
- [ATI\&07282021901](/bulletins/10199749.md), 2021-08-03, Service bulletin: AIR BAGS. Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2018\-2020 Accords \& 2019\-2020 CR\-Vs with a customer complaint of the SRS light on with the DTC B0020\-13 \(Open or Increased Resistance in the Driver's Side Airbag Inflator\) or B0028\-13 \(Open or Increased Resistance in the Front Passenger's Side Airbag Inflator\) stored or in active fault. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

JSON: [/v1/bulletins/10202598](/v1/bulletins/10202598)

[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%20A21100B&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10202598&vehicle=Service%20bulletin%20A21100B)