Repair / Replace CMU wiring
harness.
Page 7 of 11

CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2019 Mazda North American Operations, U.S.A.

Service Alert No.: SA-042/19

11

Last Issued: 09/25/2019

Check / Replace the CMU. Retrieve CMU data log if
possible before replacing CMU.
Did DTC B119F:49 clear?

No

Check / Replace the CMU.
Retrieve CMU data log if possible
before replacing CMU.

Yes

Repair completed.

No

Repair / Replace GPS antenna.

NOTE: Remove aftermarket GPS devices that may interfere with vehicle GPS antenna.
Example: Some radar detectors may emit radio waves that interfere with the vehicle GPS antenna.

No. 8 Voice Recognition Does Not Work
Step

Inspection

Result

Action

Yes

Go to MGSS for DTC diagnosis

No

Go to step 2.

1

Using M-MDS, are any infotainment system DTC's
stored?

Go to step 3.

2

Go to MGSS "DIAGNOSTIC ASSIST FUNCTION
Pass
[CONNECTIVITY MASTER UNIT (US)]"
Perform Functional Inspection/Adjustment - Steering
Fail
SW Inspection - Did the Steering SW Inspection
Pass?
Pass

3

Go to MGSS "DIAGNOSTIC ASSIST FUNCTION
[CONNECTIVITY MASTER UNIT (US)]"
Perform Functional Inspection/Adjustment Microphone Inspection Did the Microphone Inspection Pass?

Check / Replace the CMU. Retrieve
CMU data log if possible before
replacing CMU.

Fail

Go to MGSS MICROPHONE
INSPECTION.

Go to MGSS STEERING SWITCH
INSPECTION.

No. 9 Cannot Make a Hands-Free Call
Step
1

Inspection

Result

Using M-MDS, are any infotainment system DTC's Yes
stored?
No

2

Is Bluetooth enabled on the customers device?

3

Is the customers device data service strength
good?

4

Is the customers device paired to the vehicle?

Action
Go to MGSS for DTC diagnosis
Go to step 2.

Yes

Go to step 3.

No

Enable Bluetooth on the customers
device.

Yes

Go to step 4.

No

Move to a location where data service
strength is good and retest.

Yes

Go to step 5.

No

Pair the customers device to the vehicle.
Page 8 of 11

CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2019 Mazda North American Operations, U.S.A.

Service Alert No.: SA-042/19

Last Issued: 09/25/2019

Yes

Go to step 6.

No

Select the customers device from
Bluetooth settings.

Yes

Normal Operation

5

Is the customers device selected in MAZDA
CONNECT settings?

6

Delete the device from MAZDA CONNECT and
then re-pair it.
Does Bluetooth work correctly?

No

Go to step 7.

Go to http://infotainment.mazdahandsfree.com Yes
Web Site.
No
Is the customers device compatible?

Go to step 8.

7

8

Does the same symptom occur on another same Yes
model/year vehicle?
No

Go to step 9.

9

Reboot the customers device. Does Bluetooth
work correctly?

10

Is the Bluetooth device in a place where radio
waves may be blocked?
(Behind or under a sheet, in a box, in a
purse/bag, ext.)

11

12

13

14

15

Vehicle operation is normal.

No

Go to step 10.

Yes

Move the Bluetooth device away from
hidden location.

No

Go to step 11.

Is a Bluetooth device and a USB device connected Yes
at the same time?
No

Does the same symptom occur on another
Bluetooth device?

Does the voice recognition system operate using
other functions such as Bluetooth Audio?

Go to step 10.

Yes

Is the Bluetooth device contacting or blocked by Yes
metal objects?
No

Does the problem occur in a specific geological
location only?

The customers device is not compatible.

Move the Bluetooth device away from
metal objects.
Go to step 12.
Disconnect other USB device.
Go to step 13.

Yes

Move to a different location.
This may be caused by electrical
interference by radio stations, specific
small power radio stations, or amateur
radio stations for mobile identification
used in industrial, scientific and medical
devices.

No

Go to step 14.

Yes

Go to step 15

No

The customers device is not compatible.

Yes

Check / Replace the CMU. Retrieve CMU
data log if possible before replacing CMU.
Document device model, software
version and occurrence condition.

No

Go to No. 8 Voice Recognition Does Not
Work
Page 9 of 11

CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2019 Mazda North American Operations, U.S.A.

Service Alert No.: SA-042/19

Last Issued: 09/25/2019

No. 10 Cannot Play Bluetooth Audio
Step
1

2

3

4

Inspection
Using M-MDS, are any infotainment system DTC's
stored?
Is Bluetooth enabled on the customers device?

Is the customers device data service strength good?

Is the customers device battery strength good?

Result

Action

Yes

Go to MGSS for DTC diagnosis

No

Go to step 2.

Yes

Go to step 3.

No

Enable Bluetooth on the customers
device.

Yes

Go to step 4.

No

Move to a location where data service
strength is good and retest.

Yes

Go to step 5

No

Connect the customers device to a
charger or recharge the device, then
retest.

Yes

Go to step 6.

No

Pair the customers device to the
vehicle.

Yes

Go to step 7.

No

Select the customers device from
Bluetooth settings.

5

Is the customers device paired to the vehicle?

6

Is the customers device selected in MAZDA
CONNECT settings?
Delete the device from MAZDA CONNECT and then
re-pair it.
Does Bluetooth work correctly?

Yes

Normal Operation

7

No

Go to step 8.

Yes

Go to step 9.

8

Go to http://infotainment.mazdahandsfree.com
Web Site.
Is the customers device compatible?

No

The customers device is not
compatible.

9

Does the same symptom occur on another same
model/year vehicle?

Yes

Go to step 10.

No

Go to step 11.

10

Reboot the customers device. Does Bluetooth work Yes
correctly?
No

Vehicle operation is normal.

11

Is the Bluetooth device in a place where radio waves
Yes
may be blocked?
(Behind or under a sheet, in a box, in a purse/bag,
No
ext.)

Move the Bluetooth device away from
hidden location.

12

Is the Bluetooth device contacting or blocked by
metal objects?

Go to step 11.

Go to step 12.

Yes

Move the Bluetooth device away from
metal objects.

No

Go to step 13.
Page 10 of 11

CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2019 Mazda North American Operations, U.S.A.

Service Alert No.: SA-042/19

Last Issued: 09/25/2019

Yes
13

Is a Bluetooth device and a USB device connected at
the same time?
No

Disconnect other USB device.
Check / Replace the CMU. Retrieve
CMU data log if possible before
replacing CMU.

Page 11 of 11
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.

© 2019 Mazda North American Operations, U.S.A.