Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE
Pcm Configuration (Using As-Built Data)
CAUTION:
- When the configuration is performed, CAN communication between the PCM and control module connected to the CAN circuit is cut temporarily, and communication error DTCs may be detected. After performing the configuration, verify the DTCs for the control module connected to the CAN circuit and clear it if any DTC is detected.
- Connect the M-MDS to the DLC-2.
- After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- Select "Module Programming".
- Then, select items from the screen menu in the following order.
- Select "As-Built".
- Select "PCM".
- Perform the configuration according to the directions on the screen.
- Verify the DTCs for all of the control modules connected to the CAN circuit.
- If any DTC is stored, clear it.
- If the DTC is cleared, finish the procedure because the configuration has been completed normally.
- If the DTC remains, perform troubleshooting according to the DTC.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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