Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
NEXT SERVICE DATE SETTING CHANGES TO MANUAL BY ITSELF
AND/OR DISPLAYED AVERAGE FUEL ECONOMY GRADUALLY GETS
WORSE WITHOUT RESET

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

APPLICABLE MODEL(S)/VINS
2019 Mazda3 (Japan built) vehicles with VINs lower than JM1BP******142784 (produced before May 27,
2019)
2019 Mazda3 (Mexico built) vehicles with VINs lower than 3MZBP******113637 (produced before May 28,
2019)

DESCRIPTION
Some customers may experience one or both of the following:



The “Next Service Date” setting under Vehicle Status Monitor in the center display changes to
“Manual” by itself after being set to “Automatic” and even with the “Manual” setting in the display,
the internal calculation works as if set to “Automatic”. The “Engine oil change” message is then
displayed when the oil deterioration level reaches the threshold. This is caused by a communication
error between the PCM, BCM and CMU.
.

Page 1 of 10
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.

Bulletin No.: 09-037/19



Last Issued: 10/16/2019

The average fuel economy display in the instrument cluster gradually gets worse after 1,200 miles
(2,000 km) of driving without a reset regardless of the actual driving situation. This concern is only
present in the display and not in the actual fuel consumption.

To correct these issues, the software of the BCM has been modified.

REPAIR PROCEDURE
1. Perform BCM software update using Mazda Diagnostic And Repair Software (MDARS). Refer to
"MDARS - ECU Reprogramming Procedure".
NOTE:





For 5HB vehicles, also perform LFU software update. If LFU reprogramming is not performed, it
may result in other concerns as stated in TSB 09-035/19.
After the reprogramming, pending DTC P2610:00 [PCM] will be stored without the CHECK ENGINE
light on. Start the engine and clear the DTC.
If DTC U2120:00 or/and U2500:82 are stored and i-ACTIVSENSE warning light (amber) turns on
after the reprogramming, refer to SA-036/19.

NOTE: If the current calibration file name on the ECU FILENAME screen is the same as shown below or
with a later suffix, reprogramming is not necessary.

VIN

Body BCM file name

BCM_SUB file name

LFU file name

BCWK-66S06-E
Start with JM1 5HB BEMD-66S02-J
B0J8-66S03(Japan built) 4SD BCKA-66S02-M
N/A
(BCKB-66S03- for later suffix
Start with 3MZ
BCM software)
4SD BDTS-66S02-J
N/A
(Mexico built)
2. Verify the repair.
MDARS ECU Reprogramming Procedure
NOTE: This procedure explains a generic reprogramming for all Electrical Control Units (ECU) such as
PCM, BCM, ESU, etc. Be aware that some sentences and screen images below mention a certain control
unit such as "PCM" or "BCM" as an example.

Page 2 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

ATTENTION: READ ALL CAUTIONS AND NOTES BEFORE AND AFTER REPROGRAMMING!
CAUTION:






A poor connection between the vehicle and M-MDS and/or low voltage may result in
abnormal termination and/or data corruption. A low battery voltage may cause a
reprogramming failure resulting in unexpected ECU replacement.
Make sure that the following connections are firmly connected, then DO NOT touch the VCM
and DLC cable to prevent noise and a poor connection.
 Between the vehicle-side connector and the DLC cable
 Between the PC-side connector and the USB port of the PC
When reprogramming with MDARS, power consumption and voltage fluctuation are greater
than with IDS. Use the Power Supply mode in the Battery Management System (GR8) and
connect an AC adapter to the PC to stabilize voltage fluctuation.

BEFORE REPROGRAMMING
NOTE:








Turn off all electrical loads (i.e. A/C blower, audio system, rear defogger and headlights).
Perform a self-test and verify no DTCs are stored. If any DTCs are stored, repair the concern and
delete the DTCs.
Disconnect any aftermarket accessories (non-genuine Mazda accessories).
Terminate all programs other than MDARS on the PC. Running other programs may interfere with
the MDARS performance, resulting in the PC freezing or other problems.
Perform reprogramming with a proper internet connection. When using a wireless network, make
sure the connection is strong.
Make sure to keep enough free space on the PC’s hard disc. Insufficient free space (less than 1
GB) may result in the PC freezing during reprogramming.

1. Connect the M-MDS to the vehicle.
2. Launch the Mazda Diagnostic And Repair Software (MDARS).

Page 3 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

3. Turn the ignition on, then click “Start”.

4. Select the “toolbox” tab.

Page 4 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

5. Select Work Support group.

6. Select “Software update”, then click "Run".

Page 5 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

7. Select the ECU to be reprogrammed.

8. Confirm the current and new software versions, then click “Next”.
NOTE: When reprogramming the BCM, two softwares will be shown.

Page 6 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

9. Wait for the download, then click “Next”.
NOTE: When reprogramming the BCM, downloading will occur twice.

10. Read the screen instructions, then click “Next”.

Page 7 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

11. Follow the instructions on the screen, then click “Next”.

12. Wait for the reprogramming to complete.
NOTE:




The progress bar will stay at 90% for 30 seconds. This is not a failure.
When reprogramming the BCM, this process will occur twice.

Page 8 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

AFTER REPROGRAMMING
NOTE:



Select “Vehicle History” under “Collect Diagnostic Information”, then click “Run”.



Confirm the reprogramming on the screen and save the screen copy as a record.

Page 9 of 10
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.

Bulletin No.: 09-037/19

Last Issued: 10/16/2019

WARRANTY INFORMATION
NOTE:





This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under Mazda’s New Vehicle Limited Warranty term.
Additional diagnostic time cannot be claimed for this repair.

Warranty Type

A

Symptom Code

65

Damage Code

9W

Part Number Main Cause
Quantity
Operation Number / Labor
Hours:

5555-67-560
0
XXR9JXFX / 0.2 Hrs.

After reprogramming, be sure to keep a copy of screen on M-MDS of the ECU FILENAME along with the
repair order and warranty application sheet.

Page 10 of 10
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.