# Service bulletin 09\-036\-19\-3623a

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: 10169535
- Published by NHTSA: 2019\-12\-20
- Manufacturer's number: 09\-036\-19\-3623a
- Manufacturer's date: 2019\-12\-17
- NHTSA component: EQUIPMENT; EXTERIOR LIGHTING; VISIBILITY; EQUIPMENT ADAPTIVE/MOBILITY

## NHTSA's summary

Some customers may complain about an instrument cluster warning message "Auto Light System Malfunction. Turn On/Off Lights Manually". DTC B10AD:09 \(Humidity sensor/solar radiation sensor/auto light sensor/rain sensor malfunction\) may also be stored with the exterior light warning indicator light ON. This is caused by the rain sensor detecting a temperature higher than the operation range and temporarily stopping the auto light system. As a fail\-safe, the low beam headlights are turned on. The auto light system will start to operate normally when the A/C is turned on and the interior temperature drops. To correct this concern, the heat resistance performance of the rain sensor has been enhanced.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10169535-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10169535-9999.pdf)

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

## Components

Equipment and accessories, Glass, wipers and mirrors, Lighting

## Trouble codes named

B10AD

## Vehicles listed

- 2019 to 2020 MAZDA MAZDA3

## Recalls for the same vehicles and component

- [2019369](/recalls/tc/2019369.md), 2019-07-29: Visual System
- [19V558000](/recalls/nhtsa/19V558000.md), 2019-07-29: VISIBILITY:GLASS, SIDE/REAR
- [2019224](/recalls/tc/2019224.md), 2019-05-14: Lights And Instruments

## Other bulletins for the same vehicles and component

- [SA\-038\-26a](/bulletins/11037018.md), 2026-09-04, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE; EXTERIOR LIGHTING. This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA\-038/26 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote functions inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Index MAZDA CONNECT 2 Center Display Status Icon MAZDA CONNECT 3 Center Display Status Icon Remote Engine Start Will Not Function Remote Engine Start Function Will turn engine OFF Customer Subscription Status TCU Communication Line Status
- [SA\-043\-26](/bulletins/11035606.md), 2026-08-04, Service bulletin: VISIBILITY/WIPER. This SA supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-063/24 09/06/24 DESCRIPTION The Blind Spot Monitoring \(BSM\) system can malfunction with the following symptoms if the rear side radar sensors are installed facing the wrong direction.
- [SA\-023\-25c](/bulletins/11026916.md), 2026-01-04, Service bulletin: ENGINE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop • Door Lock / Unlock • Lights ON / OFF • Climate Control • 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ". Page
- [SA\-023\-25b](/bulletins/11022725.md), 2025-09-04, Service bulletin: UNKNOWN OR OTHER; ENGINE; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
- [SA\-023\-25a](/bulletins/11021499.md), 2025-08-05, Service bulletin: EXTERIOR LIGHTING; ENGINE; UNKNOWN OR OTHER. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
- [SA\-023\-25](/bulletins/11019179.md), 2025-06-05, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE; EXTERIOR LIGHTING. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control 3. MAZDA CONNECT connected vehicle reception strength icon shows "X" or " ".
- [SA\-025\-25](/bulletins/11019160.md), 2025-06-05, Service bulletin: VISIBILITY/WIPER. Some vehicles may exhibit wiper blade contact with the A\-pillar trim, with or without a chattering noise. This condition may be caused by worn or contaminated wiper blades. It can also be caused by bent wiper arms, or loose wiper arm retaining nuts due to improper handling. Improper handling occurs when pulling on or forcing the wiper arms. Technicians should be aware that while replacement of the wiper blade may resolve some cases, correction of bent components or repositioning of the wiper arms, particularly when the retaining nut is loose, requires additional steps to ensure proper alignment and function.
- [SA\-017\-24b](/bulletins/11008573.md), 2024-10-05, Service bulletin: ELECTRICAL SYSTEM; ENGINE; EXTERIOR LIGHTING. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control
- [SA\-017\-24a](/bulletins/10254190.md), 2024-05-04, Service bulletin: EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING; LATCHES/LOCKS/LINKAGES. Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code \(OTP\) during the MyMazda App Connected Vehicle enrollment. 2. Remote function\(s\) inoperative. Engine Start / Stop Door Lock / Unlock Lights ON / OFF Climate Control
- [SA\-007\-24a](/bulletins/10254185.md), 2024-05-04, Service bulletin: SERVICE BRAKES, HYDRAULIC; FORWARD COLLISION AVOIDANCE; EQUIPMENT ADAPTIVE/MOBILITY. This information will give you the necessary knowledge to respond to customers concerns of Smart Brake Support \(SBS\) unintended braking. By educating the customer on the system operation, it should reduce their anxiety or distrust of the vehicle.

JSON: [/v1/bulletins/10169535](/v1/bulletins/10169535)

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