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NHTSA ID Number: 11034444

Manufacturer Communication Number: SA-040-26

TSB/Document Date: 2026-07-03


Summary

This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-009/25 08/22/25 and 02/18/25 DESCRIPTION Some customers may experience a Connected Vehicle failure. The MyMazda App may display an Error Code. This document provides Error Code description and recovery information to assist with repairs. Index System Outline • MYMAZDA App Connected Vehicle (CV) Error Codes • Vehicle Confirmation Instructions • Troubleshooting Instructions • Resources


Dealer

System error and may or may not be resolved by repeated retries.
If the error continues to occur, there may be a problem with the system
center -> Go to " Troubleshooting Instructions".

E401005
Description

Due to the app’s specifications, if there is a 2+ hour difference or lag with the actual/correct time, an
error could occur.
Please check the time / time zone settings. (E401005)

MyMazda App
Message

Customer

Customer to check and verify their Date & Time settings on their phoneeBay logo (note: most phones will have
the correct time automated based on their time zone).
iPhone Example

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E900500
Description

In case KINTARO cannot get a response from a system outside KINTARO.
KINTARO is working well, and the network fault may be fixed after some minutes

MyMazda App Message

It is taking longer than normal to respond. Please try again later. [E900500]

Error Messages
Internal User SDK error
Customer inadvertently texted “Stop” to 1-949 518-0058
(Twilio SMS)

Description

MyMazda App - Internal Usher SDK error.

MyMazda App Message

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1. Text “Start” to 1-949 518-0058 (Twilio SMS)
2. Retry to create a MyMazda account.
Note: USA and Canada only

Customer

Multiple devices detected
Usually occurs if the same login credentials were used on different devices.
Description
Example, iPhone and Android.
Notification Center
Multiple devices detected
Our records indicate that your MyMazda account is being accessed across multiple devices.

MyMazda App Message

Customer

No action needed

Enrollment in Progress
Description
Enrollment in Progress
Another Connected Services enrollment request is currently in process already. Please try
again later.

MyMazda App
Message

Dealer

CV cancelation has failed. Update TCU to the latest software.

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06/16/2026 02:25 PM tlawrenc

Vehicle Confirmation Instructions
StepeBay logo
Inspection Items
1

2

Is the concern related to a remoteeBay logo control function?

Yes

proceed to step2

No

proceed to step3
proceed to the next stepeBay logo

No

Check the remoteeBay logo
operation condition again
and confirm if it works
properly (example: key
left in vehicle during
remoteeBay logo start function).

Yes

proceed to the next stepeBay logo

No

Select Enable and retry.

Using M-MDS, are there any DTC's stored?
DTC INSPECTION

Yes

Go to normal MGSS
DTC troubleshooting

No

proceed to the next stepeBay logo

Is the TCU and CMU at the latest software version?

Yes

proceed to the next stepeBay logo

No

Update software to the
latest version, then
recheck concern.

Check whether the vehicle requirements for remoteeBay logo operation are met (
example: key left in vehicle during remoteeBay logo start function).
Does the customer's smartphone MyMazda App have a failure message
at the time of occurrence?

3

5

Action

Yes

Check MAZDAeBay logo CONNECT settings.
Confirm Connected Services in System Settings is Enabled.

4

Result

• CMU Software Update
• TCU Software Update

Good
Reception
proceed to the next stepeBay logo

Does the CV reception strength icon show good or weak reception?
6

Does the CV reception strength icon show no contract?

Weak
Reception Move vehicle outside
with a clear view of the
sky and then retry.

No
Contract

7

Check RemoteeBay logo Service Flag Information

1101

Disconnect/Reconnect
the 12V battery, retry
registering the vehicle
from the MyMazda app,
and repeat from StepeBay logo 1.
If the retry result is NG,
proceed to the next stepeBay logo.
proceed to the next stepeBay logo
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DIAGNOSTIC ASSIST FUNCTION [CMU] -> Telematics communication
system linked information verification -> Flag Information
Is the remoteeBay logo service flag 1101 or 0000?
0000

Go to MazdaeBay logo Connected Vehicle Viewer (MCVV) and check
communication line status.
Example of Open Completed

8

Example of Closed Completed

If a MyMazda App error code is displayed, go to the "MYMAZDA App
Connected Vehicle (CV) Error Codes" table and perform Confirmation/
Recovery.
Check the harness (including connectors / terminals) between TEL
antenna No. 1 and TCU.
9

10

11

Disconnect/Reconnect
the 12V battery, retry
registering the vehicle
from the MyMazda app,
and repeat from StepeBay logo 1.
If the retry result is NG,
proceed to the next stepeBay logo.

Open
proceed to the next stepeBay logo
Completed

Disconnect/Reconnect
the 12V battery, retry
registering the vehicle
Closed
from the MyMazda app,
Completed
and repeat from StepeBay logo 1.
If the retry result is NG,
proceed to the next stepeBay logo.

Yes

proceed to the next stepeBay logo

No

Repair or replace the
defective part and verify
repair.

Check the harness (including connectors / terminals) between TEL
antenna No. 2 and TCU.
• Check the relevant circuit. (Reference: Circuit inspection) (Reference:
ConnectoreBay logo inspection)
• Is the circuit normal?

Yes

proceed to the next stepeBay logo

No

Repair or replace the
defective part and verify
repair.

Check for SIM abnormality
Move the vehicle outside with a clear view of the sky.
Check M-MDS PID values

Yes

Replace the TCU.

No

proceed to the next stepeBay logo

Yes

Replace anntena no.1.

No

proceed to the next stepeBay logo

• Check the relevant circuit. (Reference: Circuit inspection)
(Reference: ConnectoreBay logo inspection)
• Is the circuit normal?


TEL1_ANT_6LVL
TEL2_ANT_6LVL

Are both values 0 (0 means out of service)?
*Note: Depending on the vehicle, ***6 LVL or ***3 LVL may be
displayed."
12

Check anntena no.1.
Move the vehicle outside with a clear view of the sky.
Check M-MDS PID value

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TEL1_ANT_6LVL

Does TEL1_ANT_6LVL indicate 0?"
Check anntena no.2.
Move the vehicle outside with a clear view of the sky.
Check M-MDS PID value
13

TEL2_ANT_6LVL

Yes

Replace anntena no.2.

No

"proceed to the next stepeBay logo
(in case of both anntena
value is not equal to 0)"

Yes

Repair Complete.

No

Go to MGSS
MALFUNCTION
DIAGNOSIS FLOW
[CONTROLLER AREA
NETWORK (CAN)]
If CAN communication
has no problem, repeat
from step1 again.
If the problem is not
resolved, contact Hotline
for technical support.

Does TEL2_ANT_6LVL indicate 0?"

Verify
Repair

• Install/connect parts that were removed / disconnected during
fault diagnosis.
• Has the problem been resolved?

Troubleshooting Instructions
StepeBay logo

Inspection

Result

Action

Go to next stepeBay logo
Good
reception
1.

Check CV reception strength icon
Weak
reception

Move vehicle
outside with a clear
view of the sky and
then retry

CV enrollment
needed.
Go to Online
No Contract Enrollment

2.

Perform CMU/TCU Communication Connectivity Test.
Go to MGSS -> Diagnostic Assist Function -> Service Information -> TCU
Linked Information.
Perform:

OK

Go to next stepeBay logo

NG

Go to StepeBay logo 5.

• CMU Communication Connectivity Test (CMU, TCU Connection)
• TCU Communication Connectivity Test (TCU, CarriereBay logo Connection)

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Is the TCU software at the latest software version?
(2019 Mazda3, Confirm CMU software is at the latest version)
Go to MGSS Diagnostic Assist Function -> Service Information -> TCU Linked
Information -> TCU Software Version

3.

Yes

Go to next stepeBay logo.

No

Update TCU
software

Go to MGSS -> Infotainment/TCU -> Telematics Communication Unit (TCU)
Updates and confirm at latest software version.
Check TCU CV Contract Status
a. Go to MCVV -> Select "Vehicle Communication Line Status Reference"
b. Enter VIN and then select "Search"
c. Is the Status Detail "Open Completed" or "Closed Completed"?
Example of Open Completed
4.
Example of Closed Completed

Open
Go to next stepeBay logo
Completed

CV enrollment
Closed
needed
Completed Go to Online
Enrollment

5.

If possible, complete the Dealer Connected Vehicle Questionnaire
Go to MGSS -> MazdaeBay logo Connect Questionnaires -> Dealer Connected Vehicle Questionnaire

6.

If the problem is not resolved, contact Hotline for technical support.

Resources
MAZDAeBay logo CONNECTED SERVICES
Connected Vehicle Online Enrollment Information
1. Installing the MyMazda APP
2. Registering Your User Information
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3. Registering Vehicle Information
4. Registering Connected Service

WARRANTY INFORMATION
NOTE:



This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
This repair will be covered under MazdaeBay logo’s New Vehicle Limited Warranty term.
Additional diagnostic time cannot be claimed for this repair.
Actual time beyond 0.9 hours will require DSA or Preauthorization for non DSA dealers. Actual time over 3 hours
for DSA dealers will require Preauthorization.

Dealer Confirmation/Recovery
Warranty Type

A

Symptom Code

64

Damage Code

99

Part Number Main Cause
Quantity
Operation Number / Labor Hours:

5555-24-003A
0
YY844XRT

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TSB/Document ID: SA-040-26

Replacement Service Bulletin Number:

MFR Communication Date: 2026-06-16

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ELECTRICAL SYSTEM

MFR Component System:

MFR Component Subsystem: Connected Vehicle


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