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.
DTC B2312 Power Window Switch Malfunction: Description
The power window regulator motor assembly consists of the motor, regulator and ECU. The power window regulator motor assembly is driven by operating the power window regulator switch.
This DTC is output when the ECU built into the regulator motor assembly determines that the power window switch is stuck.
HINT:
This DTC may occur for all the windows.
- When the power window regulator motor is reinstalled or replaced, the power window control system must be initialized.
- After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the AUTO UP function is used. In such cases, the AUTO UP function can be resumed by repeating the following operation at least 5 times:
- Close the power window by fully pulling up the power window switch and holding it in the AUTO UP position.
- Open the power window by fully pushing down the switch.
Master switch:
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2312 | Master switch stuck |
|
Power window regulator motor (for Driver side):
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2312 | Master switch stuck |
|
Power window regulator motor (for Front passenger side):
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2312 | Power window regulator switch stuck |
|
Power window regulator motor (for Rear LH):
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2312 | Power window regulator switch stuck |
|
Power window regulator motor (for Rear RH):
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2312 | Power window regulator switch stuck |
|
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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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