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.
2004 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Power Window Control System - Diagnosis: Initialization
- RESET (INITIALIZE) POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) NOTE:
- Resetting the power window regulator motor (initializing the pulse sensor) is necessary if: 1) the battery terminal cable is disconnected; 2) the power window regulator master switch assembly, wire harness, power window regulator switch, power window regulator assembly and power window regulator motor are replaced or removed/installed; or 3) the POWER fuse, FR DOOR fuse, GAUGE fuse and ECU-IG fuses are replaced. If resetting is not performed, the master switch assembly will not be able to operate the AUTO operation function, jam protection function and remote operation function.
- Turn the power switch ON (IG).
- Open the power window halfway by pressing the power window switch.
- Fully pull up on the switch until the power window is fully closed and continue to hold the switch for at least 1 second.
- Check that the AUTO UP/DOWN function operates normally.
If the AUTO UP/DOWN function operates normally, reset operations are complete. If abnormal, follow steps to ( g) below.
- Disconnect the negative battery terminal cable for 10 seconds.
- Connect the battery terminal cable.
- Perform steps ( a) to b c ( d) again.
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.