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 B1140: Driver's Power Window Position Detect Circuit Error
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back to ON (II).
- Open and close the driver's power window by using the driver's switch manually.
- Check for DTCs with the HDS.
Are DTCs B1125 or B1126 indicated?
YES - Troubleshoot the DTC B1125 (see DTC B1125: DRIVER'S POWER WINDOW MOTOR A PULSE ERROR ) or B1126 (see DTC B1126: DRIVER'S POWER WINDOW MOTOR B PULSE ERROR ).
NO - Go to step 5.
- Reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT ).
- Check for DTCs with the HDS.
Is DTC B1140 indicated?
YES - Faulty door multiplex control unit; replace the power window master switch.
NO - The system is recovered at this time.
NO RELATED
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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.