NHTSA ID Number: 10228662
Manufacturer Communication Number: 07-004-22b
TSB/Document Date: 2023-01-05
Summary
Some customers may complain the A/C blows warm. This may be caused by one of two things. Cause 1: After accelerating in hot weather, the A/C blows warm air for a longer time than other models. This is caused by improper control software of the PCM not allowing the A/C compressor to resume properly after acceleration. During a hard acceleration above a certain throttle level opening, the PCM stops the A/C compressor operation for better acceleration. It then resumes the compressor operation after the acceleration. To eliminate this concern, the control software of the PCM has been modified. Cause 2: Insufficient cooling performance at ambient temperature of around 68 °F (20 °C) in daytime. This is caused when both the ambient temperature and the cabin temperature are at around 20 °C (68 °F), auto A/C set at around 20 °C (68 °F) may not cool down the cabin temperature properly. To eliminate this concern, control software of the dash-electrical supply unit (Dash-ESU) has been modified.
BULLETIN NOTES
This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red.
Previous TSBs:
Date(s) Issued:
07-004/22
10/10/22 and 09/23/22
07-006/20
12/07/20
APPLICABLE MODEL(S)/VINS
2019-2022 Mazda3 (Japan built) with VINS lower than JM1BP******516941 (produced before March 1, 2022)
2019-2022 Mazda3 (Mexico built) with VINS lower than 3MZBP******302558 (produced before February 27, 2022)
2020-2022 CX-30 with VINS lower than 3MVDM******414338 (produced before February 27, 2022)
NOTE: To identify vehicles with cylinder deactivation, examine the 8th digit of the VIN.
• L: 2.5L without cylinder deactivation
• M: 2.5L with cylinder deactivation
DESCRIPTION
Some customers may complain the A/C blows warm. This may be caused by one of two things.
• Cause 1: After accelerating in hot weather, the A/C blows warm air for a longer time than other models. This is
caused by improper control software of the PCM not allowing the A/C compressor to resume properly after
acceleration. During a hard acceleration above a certain throttle level opening, the PCM stops the A/C compressor
operation for better acceleration. It then resumes the compressor operation after the acceleration. To eliminate
this concern, the control software of the PCM has been modified.
• Cause 2: Insufficient cooling performance at ambient temperature of around 68 °F (20 °C) in daytime. This is
caused when both the ambient temperature and the cabin temperature are at around 20 °C (68 °F), auto A/C set
at around 20 °C (68 °F) may not cool down the cabin temperature properly. To eliminate this concern, control
software of the dash-electrical supply unit (Dash-ESU) has been modified.
Customers having this concern should have their vehicle repaired using the following repair procedure.
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01/03/2023 11:58 AM cciz
REPAIR PROCEDURE
1. Verify customer concern.
2. Perform one or both of the following reprogramming procedures, depending on the VIN and production date.
• Reprogram the PCM for the following vehicles (for Cause 1). Refer to MDARS ECU Reprogramming Procedure.
2019-2021 Mazda3 (Japan built) with VINS lower than JM1BP******319059 (produced before October 28,
2020)
2019-2021 Mazda3 (Mexico built) with VINS lower than 3MZBP******208291 (produced before October 30,
2020)
2020-2021 CX-30 with VINS lower than 3MVDM******231004 (produced before November 13, 2020)
○
○
○
• Reprogram the ESU for the following vehicles (for Cause 2). Refer to MDARS ECU Reprogramming Procedure.
2019-2022 Mazda3 (Japan built) with VINS lower than JM1BP******516941 (produced before March 1,
2022)
2019-2022 Mazda3 (Mexico built) with VINS lower than 3MZBP******302558 (produced before February 27,
2022)
2020-2022 CX-30 with VINS lower than 3MVDM******414338 (produced before February 27, 2022)
○
○
○
NOTE:
• If the current calibration file name in the ECU FILENAME screen is the same as shown in the Calibration Files
Information 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.
• 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.
3. Clear the DTC, turn the ignition off, and get out of the vehicle.
4. Close and lock the door.
5. Wait for at least ten minutes.
6. Verify the repair by starting the engine and making sure the Check Engine light is OFF and no abnormal warning lights
are ON.
NOTE: If any DTC should remain after performing a DTC erase, diagnose the DTC according to the instructions on
MGSS.
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01/03/2023 11:58 AM cciz
CALIBRATION
For ESU
File Name
BDGF-66S11-M
For PCM
2019-2021 US / Canada spec.
Mazda3 (Japan built) with VINS starting with JM1
Engine
Drive
AT
2WD
MT
2WD
2.0L
2WD
2.5L w/
cylinder
deactivaton
AT
4WD
MT
2WD
2WD
AT
2.5L w/out
cylinder deactivation
4WD
MT
2WD
File Name
Note
PAH9-188K2-L
PAJ1-188K2-M
Denso
PAJ2-188K2-K
PAJ3-188K2-L
Denso
PX05-188K2-N
PX06-188K2-N
Denso
PX07-188K2-R
PX08-188K2-R
Denso
PX58-188K2-M
PX59-188K2-M
Denso
PXJ7-188K2-F
PXJ8-188K2-G
Denso
PX4V-188K2-C
PX4W-188K2-C
Denso
PX4X-188K2-C
PX5A-188K2-C
Denso
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01/03/2023 11:58 AM cciz
Mazda3 (Mexico built) with VINS starting with 3MZ
Engine
Drive
AT
2WD
MT
2WD
2.0L
2.5L w/
cylinder
deactivaton
2WD
AT
4WD
2WD
2.5L w/out
cylinder deactivation
AT
4WD
File Name
Note
PAJ8-188K2-G
PAJ9-188K2-H
Denso
PAK1-188K2-F
PAK2-188K2-G
Denso
PX13-188K2-H
PX14-188K2-H
Denso
PX15-188K2-H
PX16-188K2-H
Denso
PXK5-188K2-E
PXK6-188K2-F
Denso
PX6R-188K2-C
PX6S-188K2-C
Denso
File Name
Note
PA6W-188K2-F
PA6X-188K2-F
Denso
PA7G-188K2-F
PA7H-188K2-F
Denso
PA6T-188K2-F
PA6V-188K2-F
Denso
PXH7-188K2-F
PXH8-188K2-F
Denso
PXJ9-188K2-F
PXK1-188K2-F
Denso
PXM1-188K2-F
PXL4-188K2-F
Denso
PXM2-188K2-F
PXL5-188K2-F
Denso
CX-30
Engine
Drive
2WD
AT
2.0L
4WD
MT
2.5L w/
cylinder
deactivaton
2WD
2WD
AT
4WD
2WD
2.5L w/out
cylinder deactivation
AT
4WD
Page 4 of 6
01/03/2023 11:58 AM cciz
Mexico spec.
Mazda3 (Japan built) with VINS starting with JM1
Engine
Drive
AT
2WD
MT
2WD
AT
2WD
MT
2WD
2.0L
2.5L
File Name
Note
PAJ4-188K2-K
PAJ5-188K2-L
Denso
PAJ6-188K2-K
PAJ7-188K2-L
Denso
PX09-188K2-K
PX10-188K2-L
Denso
PX11-188K2-K
PX12-188K2-L
Denso
File Name
Note
PAK3-188K2-G
PAK4-188K2-H
Denso
PAK5-188K2-G
PAK6-188K2-H
Denso
PX17-188K2-G
PX18-188K2-H
Denso
PX19-188K2-G
PX20-188K2-H
Denso
Mazda3 (Mexico built) with VINS starting with 3MZ
Engine
Drive
AT
2WD
MT
2WD
AT
2WD
MT
2WD
2.0L
2.5L
Page 5 of 6
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CX-30
Engine
Drive
2.0L
AT
2WD
AT
2WD
AT
4WD
2.5L
File Name
Note
PA7A-188K2-D
PA7B-188K2-D
Denso
PXH9-188K2-D
PXJ1-188K2-D
Denso
PXK2-188K2-B
PXK3-188K2-B
Denso
WARRANTY INFORMATION
NOTE:
• This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
• Additional diagnostic time cannot be claimed for this repair.
Warranty Type
A
Symptom Code
60
Damage Code
9W
Part Number Main Cause
Quantity
Operation Number / Labor Hours:
5555-18-881 (Cause 1)
5555-61-590 (Cause 2)
0
XXS8NXFX / 0.3 Hrs. (Cause 1)
XXW4CXFX / 0.3 Hrs. (Cause 2)
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01/03/2023 11:58 AM cciz
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TSB/Document ID: 07-004-22b
Replacement Service Bulletin Number:
MFR Communication Date: 2022-12-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
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