# Service bulletin 15\-002\-15\-3109

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: 10105653
- Published by NHTSA: 2017\-06\-08
- Manufacturer's number: 15\-002\-15\-3109
- Manufacturer's date: 2015\-12\-09
- NHTSA component: LANE DEPARTURE: BLIND SPOT DETECTION

## NHTSA's summary

SOME VEHICLES WITH BLIND SPOT MONITORING \(BSM\) MAY EXPERIENCE THE FOLLOWING CONDITIONS \(SIMILAR TO WHEN THE BSM CONTROL MODULES DETECT DIRT ON THE REAR BUMPER SURFACE\):• THE BSM TURNS “OFF” AND THE BSM OFF INDICATOR TURNS “ON” IN THE INSTRUMENT CLUSTER WHILE DRIVING • THE BSM WILL NOT TURN ON AGAIN DURING THE DRIVE CYCLE • AFTER CYCLING THE IGNITION SWITCH OFF AND ON AGAIN, THE BSM OPERATES NORMALLY • DTC U1A4B:97 OR U3000:97 IS STORED IN MEMORY \- DTC U1A4B:97 \- RADAR SENSOR SENSITIVITY TEMPORARILY DECREASES DEPENDING ON VARIOUS EXTERNAL AND ENVIRONMENTAL FACTORS \(BLIND SPOT MONITORING \(BSM\) CONTROL MODULE \(RH\)\) \- DTC U3000:97 \- RADAR SENSOR SENSITIVITY TEMPORARILY DECREASES DEPENDING ON VARIOUS EXTERNAL AND ENVIRONMENTAL FACTORS \(BLIND SPOT MONITORING \(BSM\) CONTROL MODULE \(LH\)\) TO CORRECT THIS PROBLEM, THE CONTROL LOGIC OF THE BSM CONTROL MODULES HAS BEEN CHANGED.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Driver assistance, Blind spot detection

## Trouble codes named

U1A4B, U3000

## Vehicles listed

- 2016 MAZDA MX\-5

## Other bulletins for the same vehicles and component

- [09\-005\-26](/bulletins/11028099.md), 2026-02-03, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION; ELECTRICAL SYSTEM. If the right\-side Blind Spot Monitoring \(BSM\) control module is replaced for any reason, it is also necessary to replace the left\-side BSM control module in order to complete the radar aiming procedure. If the right\-side BSM control module is replaced alone, "Automatic Configuration" and "BSM Radar Aiming" cannot be completed due to a programming error in the module. In most cases, if the left\-side BSM control module is replaced alone, "Automatic Configuration" and "BSM Radar Aiming" can be completed without any problem \(See CAUTION below for more details\). Other possible symptoms that may be found if the right\-side BSM module is replaced alone: BSM aiming fails “BSM OFF" indicator ON Center Display warning message BSM failsafe \(No operation\) DTC U3000:54 stored in memory DTC U1A4B:54 stored in memory \(CX\-3, MX\-5 only\) NOTE: Since a new BSM control module does not retain the vehicle specification information, it is necessary to acquire and store the vehicle specification information transmitted via CAN communication from the combination meter through automatic configuration after replacement.
- [System](/bulletins/10213445.md), 2022-06-06, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION. Blind spot monitoring \(BSM\) system change
- [0901316](/bulletins/10213430.md), 2022-06-06, Service bulletin: ELECTRICAL SYSTEM:ADAS:BLINDSPOT:WARNING:LAMP. Excessive condensation or water within the headlamp assembly caustion
- [00\-003/22](/bulletins/10209766.md), 2022-04-05, Service bulletin: EQUIPMENT; LANE DEPARTURE: BLIND SPOT DETECTION. In support of the new Mazda MX\-5 and CX\-3, Mazda will make available for loan on as\-needed basis, a Special Service Tool \(SST\) to allow for the radar aiming of the blind spot monitoring \(BSM\) system. The BSM radar aiming is performed whenever the BSM control module, the BSM bracket or the rear bumper is replaced.
- [MTI\_1115](/bulletins/10186261.md), 2021-02-01, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS; LANE DEPARTURE. Multi\-Model \- Blind Spot Monitoring \(BSM\) System Change \(update\)
- [00\-002\-20\-3749](/bulletins/10182091.md), 2020-11-03, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS; VISIBILITY. In support of the new Mazda MX\-5 and CX\-3, Mazda will make available for loan on an “as\-needed” basis, a Special Service Tool \(SST\) to allow for the radar aiming of the blind spot monitoring \(BSM\) system. The BSM radar aiming is performed whenever the BSM control module, the BSM bracket or the rear bumper is replaced.
- [09\-017\-19\-3473](/bulletins/10155439.md), 2019-03-29, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION; EQUIPMENT ADAPTIVE/MOBILITY. If the right\-side Blind Spot Monitoring \(BSM\) control module is replaced for any reason, it is also necessary to replace the left\-side BSM control module in order to complete the radar aiming procedure. If the right\-side BSM control module is replaced alone, "Automatic Configuration" and "BSM Radar Aiming" cannot be completed due to a programming error in the module. Other possible symptoms that may be found if the right\-side BSM module is replaced alone: BSM aiming fails, “BSM OFF" indicator ON, Center Display warning message, BSM failsafe \(No operation\), DTC U3000:54 stored in memory, DTC U1A4B:54 stored in memory \(CX\-3, MX\-5 only\).
- [15\-005\-17\-3358](/bulletins/10118466.md), 2017-10-04, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION; VISIBILITY; ELECTRICAL SYSTEM. Some customers may complain that when passing a vehicle slowly, even if the vehicle is still in the alert area, the BSM indicator light on the outer mirror glass does not illuminate. Customers who have owned previous Mazda vehicles are more likely to complain. The BSM control module has been modified to address this customer concern.
- [SA\-054\-17](/bulletins/10111030.md), 2017-08-10, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION. Blind Spot Monitoring \(Advanced BSM\) system frequently asked questions \(FAQ\)
- [15\-001\-17\-3301](/bulletins/10111013.md), 2017-08-10, Service bulletin: LANE DEPARTURE: BLIND SPOT DETECTION. Some vehicles with Blind Spot Monitoring \(BSM\) may experience the following conditions \(similar to when the BSM control modules detect dirt on the rear bumper surface\):

JSON: [/v1/bulletins/10105653](/v1/bulletins/10105653)

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