NHTSA ID Number: 10228650
Manufacturer Communication Number: SA-004-22g
TSB/Document Date: 2023-01-05
Summary
Customers having MAZDA
CONNECT concerns should have their vehicle repaired using the following repair procedure.
2021-2022 CX-5 and CX-9 - Update CMU software
version to 7000C0A-NA03_11040 or later, then go
to step 5.
2021-2022 Mazda3, CX-30 and MX-30 - Retrieve
CMU log data and contact Hotline for additional
support.
Yes
Repair Complete.
5
2021-2022 CX-5 and CX-9 - Did CMU
software version 7000C0A-NA03_
11040 or later correct customer
concern?
No
Retrieve CMU log data and contact Hotline for
additional support.
6
Is there a device connected to the
USB port?
Yes
Go to step 7.
No
Go to step 8.
Disconnect the USB device. Does the
reboot stop after USB device is
disconnected?
Yes
USB device is not compatible.
7
No
Go to step 8.
8
Does the reboot continue after ignition
key OFF then back ON?
Yes
Go to step 9.
No
Check / Replace the CMU.
1
2
Using M-MDS, are any infotainment
system DTC's stored?
3
Does the reboot continue after
removing the Navigation SD card?
4
Except CX-50 - Go to 16-004/22. Is
the CMU Serial Number within the
affected range?
Page 6 of 21
01/03/2023 10:49 AM cciz
• Retrieve CMU log data if possible before
replacing the CMU.
• Document date and time of the condition.
• Document customer device Brand/Model/
Model Number/software version on the repair
order.
Check / Replace the CMU.
9
Does the reboot continue after vehicle
battery disconnect?
Yes
No
• Retrieve CMU log data if possible before
replacing the CMU.
• Document date and time of the condition.
• Document customer device Brand/Model/
Model Number/software version on the repair
order.
No repair needed.
Page 7 of 21
01/03/2023 10:49 AM cciz
No. 4 Infotainment System Has No Sound
Step
1
Inspection
Result
Action
Yes
• DTC U3000:49 stored, Mazda3, CX-30 built
after 7/1/2021 - Update CMU to CMU_
7000C0A-NA06_12012 or later.
• DTC U3000:49 stored, MX-30 - Update CMU
to CMU_7000C0A-NA02_11036 or later.
• Except DTC U3000:49 - Go to MGSS for
DTC diagnosis.
No
• 2021-2022 CX-5 and CX-9 - Update CMU
software version to 7000C0A-NA03_11040
or later, then go to step 2.
• 2021-2022 Mazda3 and CX-30 built after July
1, 2021 - Update CMU software version to
7000C0A-NA06_12012 or later, then go to
step 2.
• 2022 MX-30 - Update CMU software version
to 7000C0A-NA02_11036 or later, then go to
step 2.
• Except vehicles listed above - Go to step 3.
Using M-MDS, are any infotainment
system DTC's stored?
Yes
Repair Complete.
No
Go to step 3.
Is sound normal other than navigation
guidance?
Yes
Go to step 4.
No
Go to step 5.
4
Can you hear the voice after raising
the navigation volume?
Yes
Normal Operation.
No
Go to step 6.
5
Can you hear sound after turning on
audio mode?
Yes
Normal Operation.
No
Go to step 7.
Yes
Repair complete.
2
• 2021-2022 CX-5 and CX-9
• 2021-2022 Mazda3 and CX-30
• 2022 MX-30
Did CMU software correct customer
concern?
3
6
Replace the Navigation SD Card. Can
you hear voice after Navigation SD
Card replacement?
Check / Replace the CMU.
No
• Retrieve CMU log data if possible before
replacing the CMU.
• Document date and time of the condition.
Page 8 of 21
01/03/2023 10:49 AM cciz
7
8
Can you hear sound after raising the
volume of audio?
>
Are there any problems with the media
and the music files?
>
Are there any problems with the
antenna and the reception?
>
Are there any problems with
Bluetooth?
Yes
Normal Operation.
No
Go to step 8.
Yes
>
Check the media and the compatible files.
>
Check the antenna, the reception, and the Remote
Tuner side.
>
Check the Bluetooth connection and the Bluetooth
device.
No
Go to step 9.
Check / Replace the CMU.
9
Go to MGSS "DIAGNOSTIC ASSIST
FUNCTION [CONNECTIVITY
MASTER UNIT (US)]" and
perform Functional Inspection/
Adjustment -> Active Speaker Check
Function -> Speaker Inspection.
Did the Speaker Inspection Pass?
Pass
• Retrieve CMU log data if possible before
replacing the CMU.
• Document date and time of the condition.
• Document customer device Brand/Model/
Model Number/software version on the repair
order.
Fail
Go to step 10.
Is the connector for the Speaker(s)
that failed inserted correctly?
Yes
Go to step 11.
No
Insert the connector correctly.
11
Is the connector for the amplifier
inserted correctly?
Yes
Go to step 12.
No
Insert the connector correctly.
12
Are the CMU connectors inserted
correctly?
Yes
Go to step 13.
No
Insert the connectors correctly.
13
Swap speakers from good known
vehicle. Can you hear sound?
Yes
Check / Replace the speakers.
No
Go to step 14.
14
Swap the Amplifier from known good
vehicle. Can you hear sound?
Yes
Check / Replace the Amplifier.
No
Go to step 15.
10
Check / Replace the Remote Tuner
Review the following for possible cause of Remote
Tuner failure.
Swap the Remote Tuner from known
15
good vehicle. Can you hear sound?
16 Swap the CMU from known good
Yes
• CX-30 - Review SA-035/21 and 09-020/21.
• Mazda3 - Review 09-020/21.
• CX-5 and CX-9 - Inspect Remote Tuner for
external water corrosion. Contact the Mazda
National Technical Hotline before attempting
any repairs.
No
Go to step 16.
Yes
Check / Replace the CMU.
Page 9 of 21
01/03/2023 10:49 AM cciz
vehicle. Can you hear sound?
• Retrieve CMU log data if possible before
replacing the CMU.
• Document date and time of the condition.
• Document customer device Brand/Model/
Model Number/software version on the repair
order.
No
Repair/Replace wiring harness. Go to MGSS View
Content -> Wiring Diagram -> Body and
Accessories -> Entertainment System.
No. 5 Commander Switch Does Not Work
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
Does the Commander Switch work
correctly?
Yes
Go to step 3.
No
Go to step 4.
3
Does the Steering Wheel Switch work
correctly?
Yes
Normal Operation.
No
Go to step 5.
4
Is fuse F13 missing?
Yes
Go to SA-025/19.
No
Go to step 8.
5
Go to MGSS "DIAGNOSTIC ASSIST
Pass Go to step 6.
FUNCTION [CONNECTIVITY MASTER
UNIT (US)]"
Perform Functional Inspection/Adjustment - Fail Go to MGSS STEERING SWITCH
INSPECTION.
> Steering SW Inspection -> Did the
Steering SW Inspection Pass?
6
Is the connector for the CMU inserted
correctly?
Yes
Go to step 7.
No
Insert the connector correctly.
Check / Replace the CMU.
7
Swap the CMU from known good vehicle.
Does the Steering Wheel Switch work
correctly?
Yes
No
8
Go to MGSS "DIAGNOSTIC ASSIST
FUNCTION [CONNECTIVITY MASTER
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TSB/Document ID: SA-004-22g
Replacement Service Bulletin Number:
MFR Communication Date: 2022-12-14
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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