BULLETIN NOTES
This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text.
Previous TSBs:

Date(s) Issued:

07-003/20

07/16/20

APPLICABLE MODEL
2020 CX-30 (Mexico built) vehicles (with Auto A/C) with VINs lower than 3MV DM**** ** 137194 (Produced before Mar.
25, 2020)
2019-2020 Mazda3 (Japan built) vehicles (with Auto A/C) with VINs lower than JM1 BP**** ** 176444 (Produced before
Apr. 16, 2020)
2019-2020 Mazda3 (Mexico built) vehicles (with Auto A/C) with VINs lower than 3MZ BP**** ** 140271 (Produced before
Mar. 25, 2020)

DESCRIPTION
Some customers may hear a repeating click sound when using the HVAC system (Auto A/C equipped vehicles only).
The click sound may be caused by the air mix doors moving back and forth. This concern has been eliminated by a
dash-electrical supply unit control software modification.
Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE
1. Verify the customer concern.
2. Reprogram the DASH-ESU with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic and Repair
Software (MDARS). Refer to MDARS ECU Reprogramming Procedure.
NOTE: Be sure to submit Diagnostic Information (ODR) data as it is a required item and will be checked during
warranty claim submission. Instructions can be found under M-MDS -> MDARS (Uploading Diagnostic
Information (ODR) Data).

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• Reprogramming is not necessary if current calibration file name in the ECU FILENAME screen is the same as
shown in Calibration Files Information or with later suffix.
• After the reprogramming, pending DTC P2610:00 [PCM] may be stored without the CHECK ENGINE light ON.
Since this DTC may turn to a current DTC depending on operations after the reprogramming, clear DTC after all
repair work is done.
3. Clear any other DTCs.
4. Verify the repair by starting the engine (READY ON) and confirming there is no CHECK ENGINE light ON or abnormal
warning lights present.
NOTE: If any DTCs should remain after deleting DTC, diagnose the DTCs according to the appropriate Troubleshooting
section in MGSS.
Explanation to Customer Regarding Avg. Fuel Economy:
Any ECU reprogramming resets the BCM's average fuel economy (remaining mileage).Therefore, the remaining mileage
may change when the customer drives the vehicle after reprogramming. After learning the customer's average fuel
consumption (calculated over several drives), the remaining mileage will be correctly displayed.
CALIBRATION
File Name
BDGF-66S11-L

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

82

Damage Code

9W

Part Number Main Cause
Quantity
Operation Number / Labor Hours:

5555-61-590
0
XXS3FXFX / 0.2 Hrs.

NOTE:
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• After reprogramming, keep a copy of the ECU FILENAME on M-MDS screen along with the repair order and
warranty application sheet.
• This bulletin does not apply to vehicles equipped with a manual A/C system.

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