Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
TEMPERATURE SETTING MAY NOT CHANGE WHEN OPERATED
VERY SLOWLY

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

APPLICABLE MODEL(S)/VINS
2019-2020 Mazda3 with automatic climate control
2020 CX-30 with automatic climate control

DESCRIPTION
Some customers may notice that the temperature setting of the automatic climate control may not change
when the temperature dial is operated very slowly. Due to improper control logic of the automatic climate
control unit (IP-ESU), turning operation may not be detected when the dial is operated very slowly. To
eliminate this concern, the IP-ESU software has been modified.

REPAIR PROCEDURE
1. Verify customer concern.
2. Reprogram the IP-ESU using the Mazda Diagnostic And Repair Software (MDARS). Refer to "MDARS ECU Reprogramming Procedure".
NOTE:





If the current calibration file name on the ECU FILENAME screen is the same as BDGG-66S12-F
or with a later suffix, reprogramming is not necessary.
After reprogramming, pending DTC P2610:00 [PCM] will be stored without the Check Engine Light
ON. Start the engine and clear the DTC.
After reprogramming, if DTC U2120:00 and/or U2500:82 are stored and the i-ACTIVSENSE
warning light (amber) turns ON, refer to SA-036/19.

3. Verify the repair.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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 shots below mention a certain control unit
such as "PCM" or "BCM" as an example.
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.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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.
If MDARS requires Manual PCM Software Number Entry, follow these steps.

a. Look for the small sticker on the PCM that has the software number “**** 18 8K2*” printed on it.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

b. Enter the software number adding “-“ instead of a space.Example:If “PX06 18 8K2H” is printed, enter
“PX06-18-8K2H”.
CAUTION:Entering wrong Software Number can lead to inappropriate software downloading and may
result in abnormal operation of the vehicle.

1. Connect the M-MDS to the vehicle.
2. Launch the Mazda Diagnostic And Repair Software (MDARS).
3. Turn the ignition on, then click “Start”.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

4. Select the “toolbox” tab.

5. Select Work Support group.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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

7. Select the ECU to be reprogrammed.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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

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

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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

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

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20

Last Issued: 04/15/2020

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.

AFTER REPROGRAMMING
NOTE:



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

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc

Bulletin No.: 07-002/20



Last Issued: 04/15/2020

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

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

64

Damage Code

9W

Part Number Main Cause
Quantity
Operation Number / Labor
Hours:

5555-61-190
0
XXS29XFX / 0.3 Hrs.

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.

© 2020 Mazda North American Operations, U.S.A.
04/16/2020 11:14 AM tlawrenc