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.
2020 Mazda CX-30 Base, AWDFACTORY OEM SERVICE PROCEDURE
Power Window Sub Switch Inspection: Notes
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
- Remove the power window sub switch. (See POWER WINDOW SUB SWITCH REMOVAL/INSTALLATION .)
- Verify that the resistance between power window sub switch terminals B and D is as indicated in the table.
Switch Position Resistance (ohm) Terminal Auto Down 445. 5-454. 5 B-D Auto Up 683. 1-696. 9 Manual Up 1069. 2-1090.8 - If not as indicated in the table, replace the power window sub switch. (See POWER WINDOW SUB SWITCH REMOVAL/INSTALLATION .)
- Verify that the continuity between the power window sub switch terminals C and D is as indicated in the table.
Switch Position Continuity Terminal Manual Down C-D - If not as indicated in the table, replace the power window sub switch. (See POWER WINDOW SUB SWITCH 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.