These instructions apply to the Hyundai i20 Mk1 (PB) 2009-2014. For other models, please choose your vehicle here.
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If your Hyundai i20 Mk1 (PB, 2009–2014) has the electric glass sunroof and its one-touch open/tilt has stopped working — typically after a battery disconnection, a flat battery or a fuse change — the roof needs re-initialising so it relearns its end positions. It is a quick no-tools job from the cabin. This guide shows how.
Why the Sunroof Needs Re-initialising
The sunroof motor stores its fully-closed, tilted and fully-open positions so the one-touch and anti-trap (pinch protection) functions work. Losing power clears that memory — the roof still moves while you hold the switch, but the automatic operation stops until it is re-taught.
How to Re-initialise the i20 Sunroof
Do this with the ignition on (engine can be off):
- Turn the ignition on.
- Close the sliding/tilting roof fully, then release the switch.
- Press the switch to the maximum tilt position, then wait 1 second.
- Press the switch again and hold it — the roof runs through its learn cycle.
- Keep holding until the sliding roof stops moving, then wait 5 seconds.
- Check the one-touch operation — a single press should now tilt/open the roof automatically.
If It Still Won’t Operate Automatically
- Repeat the procedure — the holds must be long enough for the roof to run the full learn cycle.
- Let the cycle finish — don’t release the switch until the roof has stopped moving on its own.
- If you have just done battery work, run this alongside the window initialise.
Frequently Asked Questions
Why did my sunroof stop auto-opening after a battery change?
Disconnecting the battery wipes the roof’s stored end positions, so one-touch and anti-trap switch off until you re-teach it with the routine above.
Do I need any tools?
No — just the overhead switch and the ignition on. No diagnostic equipment is required.
The roof reverses when closing — what’s wrong?
That is the anti-trap protection reacting because the limits aren’t learned. Re-run the initialisation and make sure nothing is obstructing the channel.
My i20 doesn’t have a sunroof — does this matter?
No — only cars optioned with the electric glass sunroof need this step. If yours has none, skip it.
For battery work that triggers this reset, see our i20 battery disconnect/reconnect guide. For warning lights, look up the code on autodtcs.com.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
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