NHTSA ID Number: 10201862
Manufacturer Communication Number: SA-027-21b
TSB/Document Date: 2021-10-05
Summary
MAZDA
CONNECT Symptom Troubleshooting (7th Generation Vehicles). Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
- 💝【Questions? We’re Here Anytime】MK808S is a...
- 🔥🔥🔥【2026 NEWLY RELEASED BI-DIRECTIONAL...
- 【28+ MOST POPULAR RESET SERVICE FOR 150 MAKES】Autel...
- 【ALL SYSTEM DIAGNOSTICS, FACTORY-LEVEL SCANNER】The...
- 【AUT0 SCAN & AUT0V1N, 10X FASTER】How much have you spent...
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: SA-027-21b
Replacement Service Bulletin Number:
MFR Communication Date: 2021-09-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
BULLETIN NOTES
This service alert supersedes the previously issued service alert listed below. The changes are noted in Red text.
Previous Service Alert:
Date(s) Issued:
SA-027/21
06/24/21 and 04/07/21
SA-027/20
10/16/20, 09/22/20, 09/11/20, 07/16/20, 06/23/20, 04/08/2
0, 03/19/2020 and 02/11/20
SA-042/19
12/12/19 and 09/25/19
APPLICABLE MODEL(S)/VINS
2019-2021 Mazda3
2021 CX-5
2020-2021 CX-30
2021 CX-9
DESCRIPTION
Customers having MAZDA CONNECT concerns should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
NOTE: Before proceeding:
• Document the vehicle current MAZDA CONNECT CMU software version.
• Confirm that the Connectivity Master Unit (CMU) is updated to the latest software version.
Go to MGSS -> Infotainment -> MAZDA CONNECT Updates
Go to TSB 16-001/20 to view MAZDA CONNECT CMU software fix list.
• Confirm that the customers device is compatible. Go to connect.mazda.com -> Support -> Compatibility.
• Confirm that the customers device is updated to the latest software version.
• If CMU log data collection is necessary, collect the data and continue troubleshooting using this document. If no
failure is found, release the vehicle to the customer and inform them that the infotainment system data is being
analyzed. Hotline will contact you at a later date with the results.
• Apple Carplay/Android Auto FAQ, go to SA-001/19.
• If you suspect a counterfeit Navi SD card, ask the customer for proof of purchase. It cannot be determined by
visually looking at the label. If Mazda Toolbox is used and a counterfeit SD card is detected, the customer VIN
may be locked-out.
• If possible, complete any one of the Microsoft Forms Questionnaires. Go to MGSS -> Infotainment -> MAZDA
CONNECT Questionnaire.
○
○
Page 1 of 16
09/30/2021 08:07 AM tlawrenc
Index:
No. 1 Blank Screen
No. 2. Rear View Camera is not displayed
No. 3 Rebooting
No. 4 Infotainment System Has No Sound
No. 5 Commander Switch Does Not Work
No. 6 Bluetooth device will not pair
No. 7 Incorrect GPS position
No. 8 Voice Recognition Does Not Work
No. 9 Cannot Make a Hands-Free Call
No. 10 Cannot Play Bluetooth Audio
No. 11 How to update the Navigation SD Card Map
No. 12 How to Check Navi SD Card VIN Lock
Page 2 of 16
09/30/2021 08:07 AM tlawrenc
No. 1 Blank Screen
Step
Inspection
Result
Action
Yes
Go to step 2.
No
Refer to No. 2. Rear View Camera is not displayed
Press and hold the Power Button. Is the
screen displayed correctly?
Yes
Normal Operation
No
Go to step 3.
3
Press the "HOME" button. Is the HOME
screen displayed correctly?
Yes
Normal Operation
No
Go to step 4.
4
Using M-MDS, are any infotainment
system DTC's stored?
Yes
Go to MGSS for DTC diagnosis
No
Go to step 5.
5
Is there a device connected to the USB
port?
Yes
Go to step 6.
No
Go to step 7.
Disconnect the USB device. Does the
display function properly after USB
device is disconnected?
Yes
USB device is not compatible
6
No
Go to step 7.
7
Is the connector for the Center Display
inserted correctly
Yes
Go to step 8.
No
Insert the connector correctly.
8
Are the connectors for the CMU
inserted correctly?
Yes
Go to step 9.
No
Insert the connectors correctly.
Is the CMU voltage out (PWR CTRL
OUT) at 0920-101A Terminal 1S, SB
wire, of the CMU normal?
Yes
Go to step 10.
9
No
Go to step 11.
Swap the Center Display with good
known vehicle. Is the screen display
normal?
Yes
Check / Replace the Center Display.
10
No
Go to step 11.
1
Is the Rear View Camera displayed?
2
Check / Replace the CMU.
Yes
11
Swap the CMU with good known
vehicle. Is the screen display normal?
No
• Retrieve the data log if possible before
replacing the CMU
• Document date and time of the condition
Repair / Replace wiring harness. Go to MGSS
View Content -> Wiring Diagram -> Body and
Accessories -> Entertainment System.
Page 3 of 16
09/30/2021 08:07 AM tlawrenc
No. 2 Rear View Camera is not displayed
Step
Inspection
Result
Action
1
Using M-MDS, are any infotainment
system DTC's stored?
Yes
Go to MGSS for DTC diagnosis
No
Go to step 2.
2
Is the vehicle equipped with 360
View Monitor?
Yes
Go to step 3.
No
Go to step 4.
3
Is the Front Camera and Side
Cameras displayed normally?
Yes
Check / Replace the 360 View Monitor control unit.
No
Go to step 4.
4
Are images other than the Rear
View Camera displayed?
Yes
Go to step 5.
No
Go to No. 1 Blank Screen.
5
Is the connector for the Rear View
Camera Inserted correctly?
Yes
Go to step 6.
No
Insert the connector correctly.
6
Is the connector for the Center
Display Inserted correctly
Yes
Go to step 7.
No
Insert the connector correctly
7
Are the connectors for the CMU
Inserted correctly
Yes
Go to step 8.
No
Insert the connectors correctly
8
Swap the Rear View Camera with
good known vehicle. Is the screen
display normal?
Yes
Check / Replace the Rear View Camera
See TSB 09-021/19
No
Go to Step 9
Check / Replace the CMU.
9
Swap the CMU with good known
vehicle. Is the screen display
normal?
Yes
No
• Retrieve the data log if possible before
replacing the CMU
• Document date and time of the condition
Repair / Replace wiring harness. Go to MGSS View
Content -> Wiring Diagram -> Body and Accessories > Entertainment System.
Page 4 of 16
09/30/2021 08:07 AM tlawrenc
No. 3 Rebooting
Step
Inspection
Result
Is the customers device a Doro 7050, 7060 phone
Yes
that is connected by bluetooth?
Action
Update CMU software version to
7000C0A-NA01_11006 or later.
1
No
Go to next step
Yes
Go to MGSS for DTC diagnosis
No
Go to step 3.
Yes
Go to step 4.
No
Check / Replace the Navigation SD
card.
Go to SA-014/21 if applicable
Yes
Go to step 5.
No
Go to step 6.
2
Using M-MDS, are any infotainment system
DTC's stored?
3
Does the reboot continue after removing the
Navigation SD card?
4
Is there a device connected to the USB port?
5
Disconnect the USB device. Does the reboot stop Yes
after USB device is disconnected?
No
Yes
USB device is not compatible
Go to step 6.
Go to step 7.
Check / Replace the CMU.
6
Does the reboot continue after ignition key OFF
then back ON?
No
• Retrieve the data log if possible
before replacing the CMU
• Document date and time of the
condition
Check / Replace the CMU.
7
Does the reboot continue after vehicle battery
disconnect?
Yes
No
• Retrieve the data log if possible
before replacing the CMU
• Document date and time of the
condition
No repair needed.
Page 5 of 16
09/30/2021 08:07 AM tlawrenc
No. 4 Infotainment System Has No Sound
Step
Inspection
Result
Action
1
Using M-MDS, are any infotainment
system DTC's stored?
Yes
Go to MGSS for DTC diagnosis
No
Go to step 2.
2
Is sound normal other than navigation
guidance?
Yes
Go to step 3.
No
Go to step 4.
3
Can you hear the voice after raising the
navigation volume?
Yes
Normal Operation.
No
Go to step 5.
4
Can you hear sound after turning on audio Yes
mode?
No
Yes
5
Replace the Navigation SD Card. Can you
hear voice after Navigation SD Card
No
replacement?
6
Can you hear sound after raising the
volume of audio?
7
>
Are there any problems with the media and
the music files?
Yes
>
Are there any problems with the antenna
and the reception?
>
Are there any problems with Bluetooth?
No
8
Normal Operation.
Go to step 6.
Complete
Check / Replace the CMU. Retrieve
• Retrieve the data log if possible before
replacing the CMU
• Document date and time of the condition
Yes
Normal Operation
No
Go to step 7.
- 🔥🔥🔥2026 New Functions Making X7HD the Top Dog - Big Surprise!!! ANCEL X7HD truck scanner 10 major functional advantages .✅>Full HDOBD/OBD2 Function ✅>ALL System Diagnostic ✅>42+ Reset Function ✅>Active Test / Bi-Directional Control✅>ECU Coding✅>Graphing Live Data✅>Wide Compatibility ✅>2 Yrs Free Update✅>Remote Operation✅>Bluetooth 5.0 & Wifi In addition, 8 major hardware advantages: ✅>6000 mAh✅>10.1 inch Tablet✅>2G RAM
✅>32G ROM (Expandable to 128GB)✅>Data Record & Replay & Print✅>Android 10.0✅>Bluetooth 5.0 & Wifi✅>14 Languages - 🚛OEM DPF Forced Regen & Cylinder Cutout Test & more - ANCEL X7HD diesel scanner diagnostic tool not only supports DPF regeneration, DPF reset, DPF related information reset, DPR state reset, DPD forced regeneration etc, which helps you better solve the exhaust aftertreatment system problems, but also supports activate motor to do exhaust air in ABS Automatically. Moreover, it features TPMS activation, cylinder cut-off and learning functions
- 🚛Advanced ECU Coding & Programming - ANCEL X7HD 10.1inch truck scanner diagnostic tool is equipped with advanced ECU coding, supports Level calibration, Idle speed learning and Adjustment, Camshaft timing control learning, Control unit adaptations, Injector Codes, Read/Write VIN, Road speed limit optional vehicle speed set, etc... PLEASE NOTE that ECU codes are not compatible with all vehicles, please send us your VIN# to check vehicle compatibility
- 🚛42+ Reset Functions & Bidirectional Control - 2026 newest top heavy duty truck scan tool, comes with 42+ special services (ECU, Speed Limit and Idle Reset, Oil Reset, Injector Coding, EPB, ABS, SRS, Suspension, Throttle, etc. and always keep growing), which meet all your various needs for service and maintenance
- 🚛10 Inch All Systems Diesel Scanner & Full HDOBD/OBD2 Modes - ANCEL X7HD diesel truck scan tool supports all systems scan, such as Engine, Brake, Retarder, TECU Transmission, Tachograph, ABS, SRS, TPMS, EPB, SAS, ESP, and other vehicle systems, comes with 10 obd2 service modes: read/erase error codes, Data Stream, I/M Readiness, Vehicle Information, Actuations, DTC Lookup, EVAP, view freeze frame, etc
- 【Extensive Compatibility】HD601 heavy duty truck scanner supports 12V & 24V commercial vehicles and all major truck models that comply with standard protocols (SAE J1939, SAE J1708, ISO 14230-4, ISO 15765-4 and ISO 9141-2, ISO 27145-4 and Euro6). Fits for Cummins, Paccar, Detroit, Caterpillar, Freightliner, International, Peterbilt, Ford Heavy Truck, Class 4-Class 8 trucks, etc. It also supports engine diagnosis on most cars, minivans, light trucks and pickups
- 【 Full System Diagnostic】HD601 Diesel Scanner supports all system scans of heavy trucks compliant with standard protocols SAE J1939 & J1708, such as Engine, ABS, Transmission, Braking System, ESP, EPS, Fuel System, etc, It is a great scan tool for Cummins, Caterpillar, Detroit, Caterpillar, Maxxforce, Bendix,Wabash, Wabaco, Haldex, Allison, Eaton heavy trucks, With this truck tool, you can get deep analysis data about the system and do some repairs by yourself, saving much time and money. Note: Only heavy truck vehicles that comply with the above protocol can diagnose the entire system
- 【Enhanced Diesel OBD Scanner】The HD601 Diesel OBD Scanner offers unparalleled diagnostic capabilities for heavy-duty trucks. Beyond code reading, clearing, and live data display, it retrieves vehicle information, freeze frames, and DTCs. With 6, 9, and 16 pin cables, it ensures compatibility with various engines. This scanner's real-world testing prowess ensures comprehensive support for a wide array of heavy-duty truck engines, making it an indispensable tool for truck diagnostics
- 【DTC Library】+【Life Time Free Update】The built-in DTC library allows you to retrieve the codes directly without searching for the definition in the book. Whether you are a professional mechanic or a DIY car owner, HD601 diesel scanner explains the existing problem, makes it easier for you to understand code definitions and helps you locate vehicle faults. Note: This device cannot directly solve the fault. Plus, you get a lifetime free internet updates, so you always have the latest software for diagnostics in English and Spanish languages.
- 【Friendly Design, Easy of Use】This scanner is plug and play, simple and convenient, and very friendly for beginners. With improved buttons for easy menu navigation. The excellent 2.8 inch LCD color screen makes it easy to view the displayed results and gives you a better overview of your car's problem areas and the identified codes. In addition, the processor is super-fast and responds without lagging, providing maximum comfort and efficiency in diagnostic and service work
- Why NEXAS NL102 Truck Scan Tool? The NL102 outshines other truck scanner with its extensive diagnostic features. It offers full system diagnostics for major trucks meeting standard protocols, along with complete OBD2 functionality. Beyond read fault codes, clear codes and live data display, it enables vehicle info retrieval, freeze frame capture, and DTC lookup. Equipped with 6-pin, 9-pin, 16-pin connectors, it ensures broad truck compatibility. Plus, enjoy lifetime free updates in English, Spanish, and French, keeping your diagnostic scanner software current.
- Wide Compatibility - Friendly Reminder: To avoid compatibility issues, please confirm with us via Amazon Messages before purchasing. This heavy duty truck scanner is compatible with all heavy-duty trucks and semi that adhere to standard protocols (J1587, J1939, J1708). It covers a wide range of vehicle models, including Cummins, Detroit, Caterpillar, Freightliner, International, Kenworth, John Deere, Peterbilt, Sterling, Mack, Paccar, Western Star, Mercedes-Benz, Volvo, Scania, MAN, Renault, ERF, Foden, Seddon-Atkinson, Iveco, DAF, SISU, STEYR, ISUZU etc. Equipped with 6-pin, 9-pin, and 16-pin connectors for versatile device compatibility, ensuring stable plug-and-play connections.
- Save Hundreds of Money for All Heavy Duty Trucks – This diesel diagnostic scanner supports accurate full-system scans for all heavy-duty trucks that comply with standard protocols (J1587, J1939, and J1708). It can read and clear trouble codes across a range of vehicle systems, including the engine, transmission, instrument panel, drivetrain, brake system, suspension, ABS, ESP, EPS, fuel system, etc. The truck scanner communicates directly with your truck's computer to provide real-time data stream analysis, letting you pinpoint issues with precision. This cuts down on waste from unnecessary part replacements, saving you time and hundreds or even thousands of dollars.
- All OBD2 Functions + Battery Health Monitoring – Unlike many obd2 scanners on the market that only cover partial OBD2 features, ours gives you full OBD2 capability: read & clear codes, live data, freeze frame data, I/M readiness checks, EVAP tests, on-board monitor, O2 sensor tests, vehicle info, and DTC lookup. That means more detailed insights for pros and DIYers alike. The NL102 isn't just a code scanner – it's a battery saver. Regularly check your car's battery health, and catch issues before it dies completely. No more unexpected no-starts in the driveway or on the road. It diagnoses battery condition accurately, helping you avoid costly last-minute repairs.
- Plug and Play & One-click for DTC: NEXAS diesel scanner is user-friendly. It comes with an intuitive screen and easy-to-understand interface, making it accessible even for non-professionals to get started. And the built-in DTC library in the code reader allows you to directly retrieve codes without searching for definitions in books, making it easier to understand the code definitions and solve problems more quickly.
This product presentation was made with AAWP plugin.
Last update on 2026-05-13 / Affiliate links / Images from Amazon Product Advertising API