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
TCM Configuration
NOTE:
- The TCM is built into the control valve body.
- Verify TCM configuration implementation necessity for replacement parts.REPLACEMENT PART DESCRIPTION
Replacement part Configuration necessity Control valve body replacement Necessary Oil pressure switch replacement Unnecessary Automatic transaxle replacement Necessary ON/OFF solenoid replacement Unnecessary Coupler component replacement Unnecessary - Connect the M-MDS to the DLC-2.
- After vehicle identification, the following can be selected from the M-MDS initialization screen.
- Select "Module Programming"
- Then, select the following from the screen menu.
- Select "Programmable Module Installation"
- Select "TCM"
- Perform the configuration following the instructions on the screen.
- Verify that no DTCs are stored. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (EW6A-EL/EW6AX-EL)]
.)NOTE:
- If any DTC (U code) is output, the system is normal.
- Delete the U code and verify that no DTC is output. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (EW6A-EL/EW6AX-EL)]
.)
- If any DTC other than U code is output, repair the malfunctioning location according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (EW6A-EL/EW6AX-EL)] .)
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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