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
Power Window Main Switch
TERMINAL VOLTAGE DESCRIPTION
| Terminal | Signal name | Connected to | Measurement condition | Voltage (V) | Inspection item(s) |
|---|---|---|---|---|---|
| 1A | Open signal | Power window subswitch (RR) | Power cut switch is off (power cut switch is not pressed) and rear door glass (right side) is performing open operation | B+ |
|
| Other | 1.0 or less | ||||
| 1B | Open signal | Power window subswitch (passenger's side) | Power cut switch is off (power cut switch is not pressed) and front door glass (passenger's side) is performing open operation | B+ |
|
| Other | 1.0 or less | ||||
| 1C | Close signal | Power window subswitch (RR) | Power cut switch is off (power cut switch is not pressed) and rear door glass (right side) is performing close operation | B+ |
|
| Other | 1.0 or less | ||||
| 1D | Close signal | Power window subswitch (passenger's side) | Power cut switch is off (power cut switch is not pressed) and front door glass (passenger's side) is performing close operation | B+ |
|
| Other | 1.0 or less | ||||
| 1E | - | - | - | - | - |
| 1F | Door open/close signal | BCM | Terminal used for communication therefore determination based on terminal voltage is not possible. | ||
| 1G | Open signal | Power window subswitch (LR) | Power cut switch is off (power cut switch is not pressed) and rear door glass (left side) is performing open operation | B+ |
|
| Other | 1.0 or less | ||||
| 1H | Open signal | Power window motor (driver's side) | Front door glass is performing open operation | B+ | Power window motor (driver's side) |
| Front door glass is performing open operation during approx. 40 s after ignition is switched from ON (engine off or on) to off | B+ | ||||
| Other | 1.0 or less | ||||
| 1I | Close signal | Power window subswitch (LR) | Power cut switch is off (power cut switch is not pressed) and rear door glass (left side) is performing close operation | B+ |
|
| Other | 1.0 or less | ||||
| 1J | Close signal | Power window motor (driver's side) | Front door glass is performing close operation | B+ | Power window motor (driver's side) |
| Front door glass is performing close operation during approx. 40 s after ignition is switched from ON (engine off or on) to off | B+ | ||||
| Other | 1.0 or less | ||||
| 1K | IG1 | P.WINDOW1 30 A fuse | Ignition is switched ON (engine off or on) | B+ |
|
| 1L | Power supply | P.WINDOW2 25 A fuse | Under any condition | B+ |
|
| 2A | Ground | Body ground | Under any condition | 1.0 or less | Body ground |
| 2B | Hall effect switch ground | Power window motor (driver's side) | Under any condition | 1.0 or less | Power window motor (driver's side) |
| 2D | Hall effect switch No. 1 | Power window motor (driver's side) | Front door glass (driver's side) is operating | Wave pattern (See INSPECTION USING AN OSCILLOSCOPE (REFERENCE )) | Power window motor (driver's side) |
| 2F | Hall effect switch No. 2 | Power window motor (driver's side) | Front door glass (driver's side) is performing open operation | Wave pattern (See INSPECTION USING AN OSCILLOSCOPE (REFERENCE) ) | Power window motor (driver's side) |
| 2N | Hall effect switch power supply | Power window motor (driver's side) | Ignition is switched ON (engine off or on) | B+ | Power window motor (driver's side) |
| Ignition is switched off (LOCK) | 1.0 or less | ||||
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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