Reinitialise the Electric Windows

Last updated: June 4, 2026

If the electric windows on your Hyundai i30 Mk2 (GD, 2012–2017) have stopped going up with a single touch — they now only move while you hold the switch — the window controller has lost its calibration. It happens after the battery is disconnected or goes flat, after a fuse is pulled, or after a window motor or regulator is replaced. The fix is a quick re-initialisation you can do yourself in under a minute per window, with no tools.

Why One-Touch and Anti-Trap Disappear

Each door module needs to know exactly where the window’s fully-closed position is so it can run the glass automatically and stop it if it meets resistance (the anti-trap safety function). When power is lost, the module clears that reference as a precaution. Until you re-teach it, the window only inches while you hold the switch, and the one-touch auto-up will not work.

Before You Start

• Sit in the car with the doors closed.
• Turn the ignition on (engine off is fine; the switches must be live).
• Keep fingers and objects clear of the glass — during the relearn the anti-trap protection is not active.

How to Re-initialise an i30 Window

Do this one window at a time:

1. Turn the ignition on.
2. Pull and hold the window close switch until the window is fully closed.
3. With the window fully closed, keep holding for 1 second, then release. This stores the closed position.
4. Repeat for the passenger window (and the rear windows on five-door cars).
5. Test the one-touch function — a brief pull up should now run the window all the way closed on its own.

Once re-initialised, the one-touch up and the anti-trap protection return.

If the Window Still Won’t Auto-Close

• You didn’t hold long enough: the most common cause — repeat and keep the switch held a clear second after the window seats.
• Glass binding: a dry or twisted runner stops the module seeing a clean end stop. Clean and lubricate the window channel, then retry.
• Anti-trap keeps dropping the glass: friction (often a stiff seal in cold weather) makes the module think it has hit an obstacle. Warm the car, lubricate the rubbers and relearn again.
• Happened after a battery job: that is expected — the window relearn is one of the steps in our i30 Mk2 battery disconnect/reconnect guide.
• No window will calibrate: if the motor strains or is silent, the regulator, motor or switch may have failed and a body-control fault may be stored — check the code on autodtcs.com.

Frequently Asked Questions

Do I need a diagnostic tool to reset the i30 windows?

No. The relearn is done entirely with the window switch as described. A scan tool is only needed if a genuine motor, regulator or switch fault is stored.

Why did more than one window lose one-touch at once?

Because they lost power together — almost always after a flat or disconnected battery or a pulled fuse. Re-initialise each one and they all come back.

Is the anti-trap working while I re-teach the window?

No — that is why you must keep hands and objects clear of the glass during the relearn. Full protection returns once calibration is complete.

How long do I hold the switch?

Hold the close switch until the window is fully shut, then keep it held for about one more second before releasing, so the module stores the end position.

If you also need to clear a service reminder after the work, see our Hyundai i30 Mk2 service indicator reset guide.