NHTSA ID Number: 11034435
Manufacturer Communication Number: 07-002-26a
TSB/Document Date: 2026-07-03
Summary
07-002/26 06/10/26 DESCRIPTION Some customers may complain that the A/C does not cool. This concern may be due to an internal short circuit in the A/C compressor
, caused by an overcurrent. On some vehicles, the A/C high-voltage fuse opens and DTC P0D6D is stored. To eliminate this concern, the electrical circuit of the A/C compressor has been modified to prevent a short circuit even if an overcurrent occurs. REPAIR PROCEDURE 2. Replace the A/C compressor with an updated one according to the procedure in MGSS (ELECTRIC COMPRESSOR REMOVAL/INSTALLATION [e-SKYACTIV PHEV]).
BULLETIN NOTES
Customers having this concern should have their vehicle repaired using the following repair procedure.
Previous TSBs:
Date(s) Issued:
07-002/26
06/10/26
APPLICABLE MODEL(S)/VINS
2024-2026 CX-90 PHEV with VINS lower than JM3KK******350779 (produced before January 20, 2026)
2025-2026 CX-70 PHEV with VINS lower than JM3KJ******378756 (produced before January 20, 2026)
NOTE: MASH authorization is required for all parts replacement except A/C compressor. Review Mazda
Warranty Policies and Procedures Policy No.:3.28 for details.
DESCRIPTION
Some customers may complain that the A/C does not cool. This concern may be due to an internal short circuit in the A/
C compressor, caused by an overcurrent. On some vehicles, the A/C high-voltage fuse opens and DTC P0D6D is stored.
DTC
System malfunction location
P0D6D:00-PCM
Electric compressor (voltage sensor): Low input
U0605:00-PCM
LIN communication system: Communication error between electric compressor
and PCM
Other related
DTCs
System malfunction location
P0EC5:00-PCM
Error signal received from electric compressor
P0AA6:00-PCM
High-voltage insulation malfunction: Decrease in vehicle insulation resistance
To eliminate this concern, the electrical circuit of the A/C compressor has been modified to prevent a short circuit even if
an overcurrent occurs.
Customers having this concern should have their vehicle repaired using the following repair procedure.
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SI125
REPAIR PROCEDURE
WARNING: Exposure to high-voltage electrical systems and battery components can cause severe injury, electrical
burns, shock, arc flash events, and death if handled improperly. All service, repair, diagnostics, disabling, reenergizing, and handling of high-voltage systems and components on hybrid, plug-in hybrid (PHEV), and battery
electric vehicles (EV) must be performed only by technicians who have completed high-voltage training and hold the
appropriate certification/qualification for high-voltage work.
IMPORTANT: This repair requires Master Certification and completion of Course 40086ILT - High Voltage Battery
Repair ILT.
1. Verify the customer concern.
Is A/C inoperative AND DTC P0D6D:00 stored?
• YES: Go to next step.
• NO: This TSB does not apply. If the A/C is inoperative without DTC P0D6D, diagnose using normal MGSS
troubleshooting.
2. Replace the A/C compressor with an updated one according to the procedure in MGSS (ELECTRIC COMPRESSOR
REMOVAL/INSTALLATION [e-SKYACTIV PHEV]).
After the compressor replacement, is DTC P0D6D still stored?
YES: Go to next step.
NO: Verify the vehicle is repaired.
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3. Check the continuity of the high-voltage circuit including the A/C fuse.
a. Safely place the vehicle on a lift.
b. Move the driver's seat to the most forward position to make it easy to access the service plug.
c. Confirm the items below.
• The high-voltage battery is not being charged.
• Deactivate Connected Vehicle Services (Connected Vehicle Maintenance Mode) (SERVICE CAUTIONS
FOR VEHICLES WITH TELEMATICS COMMUNICATION SYSTEM)
d. Turn off the vehicle (IG-OFF).
e. Disconnect the 12V battery negative terminal.
f. Wear insulated gloves to remove the service plug ( SERVICE PLUG REMOVAL/INSTALLATION).
g. Raise the vehicle.
h. Remove the Front Under Cover No.3 and Floor Under Cover (Left side).
i. Wait for 10 minutes after removing the service plug before continuing to next step.
MASH Authorization Request (MAR) - PHEV Internal Battery Repair Form
Click here for MASH Authorization Form
This form is intended to document voltage and resistance measurements for
attachment to the Siebel file in support of MASH authorization through the online MAR
process. The QR code can be scanned to enter and save measurements into the form
on a cell phone.
j. Wear insulated gloves to remove the terminal cover.
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k. Measure the voltage between the terminals, and between each terminal and body ground to verify that all three
(3) measurements indicate zero volts. If greater than zero volts, wait a little longer until voltage is zero.
l. Disconnect all three (3) high-voltage cables at the front of the high-voltage battery pack.
m. Measure the resistance between the positive terminal of the high-voltage connector and the terminal box (+)
side shown below.
• Good fuse measurement will be 1 ohm or less.
• Blown fuse measurement will be open (OL).
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n. Measure the resistance between terminal box (+) and the positive high-voltage connector for the DCDC
Converter and the PTC Heater.
• Good fuse measurements will be 1 ohm or less.
Is the A/C high-voltage fuse open?
YES: Continue to step 4.
NO: This TSB does NOT apply. Continue diagnosis using MGSS.
4. Replace Junction Box 1 (+) according to the following procedure.
Note: the tuorial video linked below is available for reference.
A/C Fuse Replacement Tutorial Video
JUNCTION BOX ASSY FR-LH REMOVAL
WARNING: If the following sign
is indicated in the procedure, high-voltage components (live parts with over 50V)
are involved. Make sure to take the necessary actions before servicing an electric vehicle, or you may get an electric
shock that can result in a serious injury or death in the worst case. Before servicing the electric vehicle, refer to the
(HIGH-VOLTAGE SERVICE CAUTIONS) in MGSS and make sure to take all necessary actions to start services This
repair can only be performed by properly trained technicians.
Items to be prepared
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Target parts
Location (red part)
Part number
Location (red part)
[Non-reusable parts]
(1) KBB4-302K5
(2) KBB3-302K3
(3) KBB4-302K3
(4) KBB4-302K8
(5) KBB4-302K2
NOTE: When performing the procedure below, use only hand tools and calibrated torque wrenches for all internal work
and reassembly operations.
a. Remove the HV Battery. Refer to HIGH-VOLTAGE BATTERY REMOVAL/INSTALLATION
High Voltage Battery Replacement Tutorial Video
b. Remove the COVER ASSY-BAT
. Refer to COVER ASSY-BATTERY LEFT SIDE.
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c. Check the coverage area of the insulating mat
.
NOTE: The insulating mat was included in the HV Safety kit auto shipped to dealers (49HV21KIT2) and is
available separately from the Mazda Tool & Equiment site (230-JDI-IM).
WARNING: The insulating mat must always cover parts other than the parts to be worked on.
*Red: parts to be worked on.
d. Remove the PLUG ASSY-SERVICE
. Refer to PLUG ASSY-SERVICE REMOVAL.
e. Remove the BUSS BARS shown in the images.
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1) Lift the terminal covers of battery BUSS BARS and remove the nuts to remove the BUSS BARS.
Tightening torque when installing: 6.8 ± 1.1 ft·lb (9.3 ± 1.5 N·m)
2) Close the terminal covers after removing each BUSS BAR.
3) Remove the 3 small BUSS BARS between Junction Box 1 (+) and the Terminal Block.
Tightening torque when installing: 6.8 ± 1.1 ft·lb (9.3 ± 1.5 N·m)
f. Remove the JUNCTION BOX ASSY FR-LH.
1) Disconnect the connector and harness clip.
Reference: Connector shape and mounting position.
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2) Remove Junction Box 1 (+).
Tightening torque when installing: 6.8 ± 1.1 ft·lb (9.3 ± 1.5 N·m)
JUNCTION BOX ASSY FR-LH INSTALLATION
g. Install it in reverse to the removal procedure
h. Verify the repair and confirm that there are no DTCs stored and no abnormal warning lights present.
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COVER ASSY-BATTERY LEFT SIDE REMOVAL
WARNING: If the following sign
is indicated in the procedure, high-voltage components (live parts with over 50V)
are involved. Make sure to take the necessary actions before servicing an electric vehicle, or you may get an electric
shock that can result in a serious injury or death in the worst case. Before servicing the electric vehicle, refer to the
(HIGH-VOLTAGE SERVICE CAUTIONS) in MGSS and make sure to take all necessary actions to start services This
repair can only be performed by properly trained technicians.
Items to be prepared
SST - 49JP-046A0 - LIB_AIR_TIGHT_TESTER_PHEV-2
IMAGE
NAME
COUPLER A
COUPLER B
GAGE SET
Important: Once MASH has been approved for this repair. A loaner tool kit will be shipped overnight. Once repairs are
complete the tool must be returned using the supplied return label.
Target parts
Location (red part)
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[Non-reusable parts]
Part number
Location (red part)
(1) KBB4-302K5
(2) KBB3-302K3
(3) KBB4-302K3
(4) KBB4-302K8
(5) KBB4-302K2
NOTE: When performing the procedure below, use only hand tools and calibrated torque wrenches for all internal work
and reassembly operations.
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1. Measure the voltage
.
Voltage between terminals: 0V
2. Measure the voltage
.
Voltage between terminals: 0V
3. Apply insulating tape.
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4. Remove the PLATE ASSY.
a. Remove the bolts.
Tightening torque when installing: 6.8 ± 1.1 ft·lb (9.3 ± 1.5 N·m)
5. Disconnect the CABLE-MODULE
.
a. Remove the nut
.
Tightening torque when installing: 8.0 ± 1.1 ft·lb (10.8 ± 1.5 N·m)
b. Apply insulating tape
.
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c. Detach the harness clip
.
d. Remove the nut
.
Tightening torque when installing: 8.0 ± 1.1 ft·lb (10.8 ± 1.5 N·m)
e. Apply insulating tape
.
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6. Disconnect the CABLE-MODULE
a. Lower the cover
.
.
b. Remove the nut
.
Tightening torque when installing: 8.0 ± 1.1 ft·lb (10.8 ± 1.5 N·m)
c. Apply insulating tape
- ALL SIZES YOU NEED - The fuses automotive kit covers 182pcs...
- HIGH QUALITY - The auto fuse is made of Premium zinc alloy...
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If the TSB PDF does not show, download or view it on the NHTSA Website.
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TSB/Document ID: 07-002-26a
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-17
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem: A/C
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