# Service bulletin 07\-003\-24

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: 10254188
- Published by NHTSA: 2024\-05\-04
- Manufacturer's number: 07\-003\-24
- Manufacturer's date: 2024\-04\-22
- NHTSA component: ELECTRICAL SYSTEM; UNKNOWN OR OTHER

## NHTSA's summary

Some customers may complain that the ambient temperature on the instrument cluster is displayed more than 50 °F \(10 °C\) lower than the actual temperature, resulting in insufficient performance of the air conditioning. This is caused by inappropriate soldering in the ambient temperature sensor. To eliminate this concern, the soldering process has been enhanced at the supplier.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10254188-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10254188-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2016 to 2021 MAZDA CX\-3
- 2020 to 2024 MAZDA CX\-30
- 2017 to 2022 MAZDA CX\-5
- 2023 to 2024 MAZDA CX\-50
- 2016 to 2022 MAZDA CX\-9
- 2014 to 2024 MAZDA MAZDA3
- 2014 to 2021 MAZDA MAZDA6
- 2022 to 2023 MAZDA MX\-30
- 2016 to 2018 MAZDA MX\-5
- 2020 to 2022 MAZDA MX\-5

## Recalls for the same vehicles and component

- [19V403000](/recalls/nhtsa/19V403000.md), 2019-05-30: ELECTRICAL SYSTEM:WIRING
- [19V363000](/recalls/nhtsa/19V363000.md), 2019-05-14: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; SEAT BELTS:FRONT:WARNING LIGHT/DEVICES
- [17V744000](/recalls/nhtsa/17V744000.md), 2017-11-21: TRAILER HITCHES; ELECTRICAL SYSTEM:WIRING
- [2017427](/recalls/tc/2017427.md), 2017-09-01: Electrical
- [2014113](/recalls/tc/2014113.md), 2014-04-07: Electrical
- [14V173000](/recalls/nhtsa/14V173000.md), 2014-04-03: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

## Other bulletins for the same vehicles and component

- [SA\-042\-26a](/bulletins/11037900.md), 2026-10-03, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. Mazda Connected Services \- Frequently Asked Questions \(FAQ\) This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA\-042/26 06/30/26 DESCRIPTION Frequently Asked Questions \(FAQ\) Index General Questions MAZDA CONNECT Indication Setup and Getting Started Dealer Processes Registration / Enrollment / Take\-Over Customer Subscription Status WI\-FI General Informatio Opening the TCU Communication Line WI\-FI How\-To Conditions for Remote Engine Start Will Not Function WI\-FI Trial Period Conditions for Remote Engine Start Function Will turn engine OFF Interacting With The App TCU Communication Line Status Service Issues Educational Videos Troubleshooting Resources MyMazda App Error Codes Customer Opt\-Out
- [SA\-041\-26a](/bulletins/11037899.md), 2026-10-03, Service bulletin: ELECTRICAL SYSTEM. DESCRIPTION If you encounter any type of electrical concern \(e.g, dead battery, engine no start, DTC\(s\) stored...\), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC\-2 \(battery discharge/DTC stored\) 2. Devices plugged into the 12V outlet 3. GPS tracking device \(engine no start/battery discharge\) 4. Dash cam \(DTC stored\) 5. Non\-certified USB cable \(Apple Carplay™/ Android Auto™ will not connect\) 6. Over\-sized wheels/tires \(incorrect GPS location\) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button
- [SA\-038\-26b](/bulletins/11037634.md), 2026-10-01, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA\-038/26 08/18/26 and 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
- [SA\-012\-26d](/bulletins/11037632.md), 2026-10-01, Service bulletin: ELECTRICAL SYSTEM. DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode \(OTP\) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT Are the following DTCs stored? YES: Proceed to next step. NO: This service information does not apply. Continue troubleshooting using MGSS.
- [SA\-039\-26a](/bulletins/11037019.md), 2026-09-04, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. This Service Alert supersedes the previously issued SA\(s\) listed below. The changes are noted in Red text. SA\-039/26 06/15/26 Mazda Connect Symptom Troubleshooting DESCRIPTION Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
- [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\-012\-26c](/bulletins/11037017.md), 2026-09-04, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This Service Alert supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-012/26 04/17/26, 03/04/26 and 02/26/2026 DESCRIPTION Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode \(OTP\) may fail. Connected Vehicle Remote functions may fail. The following DTC's may be stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87\-8B:TCU \- COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT \(CMU\) U0198:00\-03:CMU \- COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT
- [SA\-054\-26](/bulletins/11037012.md), 2026-09-04, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This Service Alert supersedes the previously issued Service Alerts listed below: The changes are noted in Red. Infotainment Reboot With Navigation Card Installed This Service Information is no longer valid. Refer to the following updated Technical Service Bulletins: CX\-5 / CX\-9: 16\-002/23 \- UPDATED SOFTWARE RELEASE FOR CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM \(7TH GEN TYPE\) Mazda3 / CX\-30 \(Non\-Turbo\): 16\-008/23 \- UPDATED SOFTWARE RELEASE FOR CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM Mazda3 / CX\-30 \(Turbo\): 16\-007/23 \- UPDATED SOFTWARE RELEASE FOR CONCERNS WITH MAZDA CONNECT INFOTAINMENT SYSTEM
- [SA\-053\-26](/bulletins/11037011.md), 2026-09-04, Service bulletin: ELECTRICAL SYSTEM; WHEELS. This Service Alert supersedes the previously issued bulletin\(s\) listed below. The changes are noted in Red text. SA\-006/23 01/23/23 DESCRIPTION Some customers may complain about the infotainment system and/or the MyMazda App showing incorrect clock and/or tire pressures and/or tire pressure missing. This may be caused by: Incorrect calendar entry \(month/day/year\) after a battery disconnect Infotainment system software update. BCM TPMS unlearn during vehicle storage or transport. Wheel/Tire change REPAIR PROCEDURE This can be corrected by the customer driving the vehicle for a day or two so that the following will occur.
- [SA\-050\-26](/bulletins/11037008.md), 2026-09-04, Service bulletin: ELECTRICAL SYSTEM; UNKNOWN OR OTHER. DESCRIPTION Some vehicles may continue to display the recall notification "IMPORTANT NOTICE. VIEW VEHICLE STATUS MONITOR FOR DETAILS" on the center display even after the recall has been completed. NOTE: Once the warranty claim for the recall campaign is approved by Mazda Japan, the recall notification will be automatically removed via Connected Services on the following day or later. This condition may occur if the Connected Services subscription was canceled while the recall notification was still active. ACTION TO BE TAKEN If you encounter the situation above, use MDARS to manually remove the center display recall notification. Note: MDARS can only remove the recall notification when MCVV shows no CV contract.

JSON: [/v1/bulletins/10254188](/v1/bulletins/10254188)

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