NHTSA ID Number: 11021499
Manufacturer Communication Number: SA-023-25a
TSB/Document Date: 2025-08-05
Summary
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 " ".
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TSB/Document ID: SA-023-25a
Replacement Service Bulletin Number:
MFR Communication Date: 2025-07-14
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem: Infotainment System
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 SAs:
Date(s) Issued:
SA-023/25
05/15/25
SA-017/24
11/14/24, 09/10/24, 04/11/24 and 03/14/24
SA-009/23
10/23/23, 08/28/23, 08/15/23, 07/05/23, 06/12/23, 05/24/23, 04/25/23, 03/28/23, 03/01/23 and 02/06/23
SA-017/22
12/13/22, 10/10/22, 08/25/22, 05/06/22, 04/04/22
SA-013/21
12/22/21, 10/13/21, 09/14/21, 05/11/21,
04/27/21, 03/15/21, 02/22/21, 02/08/21 and 02/02/2021
SA-031/20
12/09/20,11/30/20, 11/06/20, 10/28/20, 06/16/20, 06/05/20, 06/01/20, 05/18/20,
04/14/2020, 04/02/20, 03/11/20 and 02/27/20
APPLICABLE MODEL(S)/VINS:
2019-2026 Mazda3
2021-2023 CX-9
2024-2025 CX-90
2020-2025 CX-30
2022-2023 MX-30
2024-2025 MX-5
2021-2025 CX-5
2023-2025 CX-50
2025 CX-70
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 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 "\".
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Index
•
•
•
•
•
MAZDA CONNECT Indication
Remote Engine Start Will Not Function
Remote Engine Start Function Will turn engine OFF
Customer Subscription Status
TCU Communication Line Status
MAZDA CONNECT Indication
Indication
Explanation
• Radio waves are not being received.
Move to a location with good reception.
• Data line has been closed due to Opt-Out
(Deactivation) request.
To open data line, accept T&C in CV
enrollment
○
○
Weak reception.
Good Receptioin
Strong reception.
Currently conducting an operation check of the
communication unit. If this condition continues, consult an
Authorized Mazda Dealer.
Currently conducting an operation check of the onboard
communication unit.
NOTE: Communication is not possible during this display.
The communication function is temporarily disabled due to
infotainment system setting.
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07/14/2025 07:39 PM tlawrenc
• TCU Communication Line Status is Closed
• No CV Contract
• Connected Service contract has ended
(Subscription expired)
• TCU has not been initialized, go to SA-004/21
Customer deactivated Connected Services (Opt-Out)
• eMDCS Warranty Vehicle Inquiry will show
Campaign CSP04 Status Open
Connected Services disabled (box unchecked)
Connected Services Disabled message
appears at engine start up
Enable Connected Services (box checked) to prevent
message appearing at engine start up.
Note: If customer Opted-Out ( CSP04), advise customer
to keep Connected Services box checked. The vehicle will
not transmit data.
Connected Vehicle Maintenance Mode
Connected Vehicle Maintenance Mode enabled.
Go to MGSS SERVICE CAUTIONS FOR VEHICLES
WITH TELEMATICS COMMUNICATION SYSTEM to
disable Maintenance Mode.
NOTE: Connected Vehicle Maintenance Mode is
unnecessary if the customers vehicle TCU
Communication Line Status is Closed .
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Remote Engine Start Will Not Function under the following conditions
Item
Condition
1
Remote Engine Start function is not available on EV and PHEV (inline 4) models. See SA-038/23
2
Vehicle battery voltage low
3
Automatic Transmission shift position except "P"
4
Vehicles equipped with manual transmission
5
Vehicle speed above 3 mi/h (5 km/h)
6
Brake pedal switch malfunction
7
Engine has been running by remote engine start function
8
Engine started by remote engine start more than 2 consecutive times while the vehicle is not driven.
The vehicle must be driven 1-mile or 24-hours must pass from the last successful Remote Engine
Start for the use count to reset.
2021 Mazda3, 2021 CX-30, CX-50, MX-30: Vehicle's electrical control area network (CAN) is in
"Sleep Mode"
9
or
10 A registered key is detected in the vehicle
11 Brake pedal switch detects brake application
Low fuel warning
12
13
Engine starts, then turns OFF due to abnormal high engine rpm detected. (Engine rotation over
3000 rpm continued for more than 0.2[s])
14
No engine rpm detected after sending engine start request. (Engine rotation 0 rpm continued for
more than 0.2[s])
15 When the CAN data signal for engine shut off is present (e.g.: door ajar signal)
16 After 10 second maximum cranking time
17
Burglar alarm status is "Alarm" and "Alarm stand by" (CAUTION - DO NOT enable, see TheftDeterrent System section in SA-012/20)
18 Room fuse blown/missing
19 Connected Services Disabled
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Connected Vehicle Maintenance Mode enabled (Restricted Transmitting Mode in MDARS)
20
21
Vehicle is parked (stored) for approximately 1 week or longer or in deep sleep mode.
Drive the vehicle for a few miles to recover.
DTC Stored
22
23 Aftermarket Remote Engine Start accessory installed.
Mazda Remote Engine Start (BCKA-V7-620) accessory installed (No MyMazda app remote engine
start function).
24 Mazda Remote Engine Start (RES) Removal
a. Remove the Mazda Remote Engine Start (RES) accessory module.
b. Deactivate and activate Advanced Key(s). Refer to MGSS IMMOBILIZER SYSTEMRELATED PARTS PROGRAMMING [(US)]
25
First remote control attempt fails, second attempt works fine.
Go to TSB 16-002/20.
26 CSP04 Status Open
Remote Engine Start Function Will turn engine OFF under the following conditions
Item
Condition
1
Vehicle door(s) opened
2
Vehicle trunk opened
3
Vehicle hood opened
4
Ignition switch push button "ON" detected
5
Remote engine STOP request
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07/14/2025 07:39 PM tlawrenc
6
Brake pedal switch detects brake application
7
DTC Stored
8
Engine will stop running automatically after 15 minutes for safety, security and emissions.
Customer Subscription Status
No Subscription
Mazda
Free Trial
Connected Subscription
Vehicle
Viewer
(MCVV)
Paid Subscription
No Subscription
eMDCS
Mazda Connected Vehicle Viewer (MCVV) link will be in red text
• Communication
Line Closed
• No CV
Page 6 of 56
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Contract
Mazda Connected Vehicle Viewer (MCVV) link will be in green text
Subscription
• Communication
Line Open
• CV Contract
3-year, unlimited mileage, complementary free trial
Free Trial
Subscription Period
•
•
•
•
•
•
•
•
•
2019-2024 Mazda3
2020-2024 CX-30
2021-2024 CX-5
2023-2024 CX-50
2025 CX-70
2021-2023 CX-9
2024 CX-90
2022-2023 MX-30
2024 MX-5
1-year, unlimited mileage, complementary free trial
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07/14/2025 07:39 PM tlawrenc
•
•
•
•
•
•
•
2025 - Current Mazda3
2025 - Current CX-30
2025 - Current CX-5
2025 - Current CX-50
2026 - Current CX-70
2025 - Current CX-90
2025 - Current MX-5
NOTE:
• MCVV FREETRIAL Subscription End Date is currently showing incorrect
information of 3 years instead of 1 year for the vehicles listed above. MCVV
will be corrected soon to show the correct 1 year Subscription End Date.
• All customer communications say 1-year free trial period information.
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07/14/2025 07:39 PM tlawrenc
TCU Communication Line Status
NOTE:
• Customer/Dealer can activate CV services anytime via MyMazda app
Note: There might be a slight delay in making the backend connection since it was temporarily deactivated.
Go to Repair Procedure -> Enrollment / Take-Over.
• When the TCU communication line is closed, infotainment Over-the-Air (OTA) Connectivity Master Unit (CMU)
software update is not possible (disabled).
○
○
TCU Communication Line Status Check:
Reception Icon Shows normal strength
Communication
Line is Open
Infotainment
Communication
Center
Line is Closed
Display
Reception Icon Shows "X"
• No CV
Contract
• One Time
Passcode
(OTP) is
processing
Communication Line is Closed
Mazda
Connected
Vehicle
Viewer
(MCVV)
Vehicle Status
Reference
Enter VIN and
then select
"Search"
Communication Line is Open and CV Contract is active
Page 9 of 56
07/14/2025 07:39 PM tlawrenc
TCU Communication Line is Closed
Vehicle
Communication
Line Status
Reference
TCU Communication Line is in the process of opening
One Time Passcode (OTP) is processing (Status -> Open Requested)
Enter VIN and
then select
"Search"
TCU Communication Line is Open
Page 10 of 56
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REPAIR PROCEDURE
CAUTION: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with another
vehicle will disable Connected Services on both vehicles.
Repair Flowchart
Start
Preparation
Remote function(s)
inoperative
MyMazda App
Paid Subscription
Concern
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