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
Front Power Window Motor Inspection: Driver-side
- Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Remove the power window main switch. (See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION .)
- Remove the front door trim. (Driver-side) (See FRONT DOOR TRIM REMOVAL/INSTALLATION .)
- Disconnect the front power window motor connector.
- Apply battery positive voltage and connect the ground to front power window motor terminals E and F, and then inspect the front power window motor operation.TERMINAL VOLTAGE DESCRIPTION
B+ Terminal Ground Terminal Operation E F Close F E Open - If the front power window motor does not operate as indicated in the table, replace it. (See FRONT POWER WINDOW MOTOR REMOVAL/INSTALLATION .)
- Connect the front power window motor connector.
- Connect the power window main switch connector. (See POWER WINDOW MAIN SWITCH REMOVAL/INSTALLATION .)
- Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Operate the front power window motor and verify the wave patterns for terminals B and C.
- Terminal: B (+), C (+) ↔ ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- If the malfunction, replace the front power window motor. (See FRONT POWER WINDOW MOTOR REMOVAL/INSTALLATION .)
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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