These instructions apply to the Lexus RX Mk4 (AL20) 2015-2022.
For other models, please choose your vehicle here.
The fourth-generation Lexus RX (AL20, 2015–2022) — the RX 350, RX 450h, RX 350L and RX 450hL — drives its large dash display through the console Remote Touch controller, not a touchscreen. A frozen map or unresponsive cursor is fixed by rebooting the head unit with the Power/Volume knob, which keeps every saved setting and takes only about fifteen seconds.
The infotainment system in this RX generation
The AL20 RX pairs an 8-inch or wide 12.3-inch display with Lexus’s Remote Touch controller on the console — a joystick or, on later cars, a touchpad that moves an on-screen cursor with haptic feedback. The screen is non-touch on this generation, so tapping it does nothing; you steer with the puck and the hard keys, and you reboot with the round Power/Volume knob to the left of the display. (Very late 2020–2022 cars added a closer-mounted touchscreen, but the knob reboot is unchanged.) Owners commonly report a frozen screen, a stalled navigation map, or a black display at start-up — symptoms that often look like a hardware fault but usually clear with a reboot.
Soft reset: reboot the Remote Touch head unit
- Keep the car in READY so the 12V supply stays stable through the restart.
- Find the Power/Volume knob at the left edge of the display.
- Press the knob in and hold for about 10 to 15 seconds, keeping the pressure on after the audio mutes.
- The screen goes dark and the Lexus logo appears — release the knob.
- Wait 20–40 seconds while the map, media and Remote Touch cursor reload.
Always try this reboot before assuming the screen needs replacing — the AL20’s “dead” display is far more often a software hang than a failed panel.
This is safe — no data is lost
The Power/Volume knob reboot restarts only the infotainment software. Navigation favourites, paired phones, radio presets, and seat and climate memory all stay intact. It is the same restart the head unit performs after an internal glitch, just triggered on demand, so you can use it freely whenever the screen hangs.
If it stays frozen
- Unplug any phone or USB device and reboot again — a corrupt media source can lock the unit at boot.
- Power the car fully off, open the driver’s door, wait two or three minutes, then restart for a cold boot.
- If the screen restarts in a loop, cut the Bluetooth list to one phone; multiple devices fighting to connect can keep it cycling.
- Disconnect the negative battery terminal for 15–30 minutes to fully discharge the head unit, then reconnect. Have any radio/security code ready.
- If a black or frozen screen returns repeatedly even after all of the above, have the dealer check the display harness connection and scan for a head-unit fault before quoting a screen replacement.
Factory reset (erases data)
To wipe the system to defaults, use the menu rather than the knob: MENU → Setup (gear) → General → Delete personal data, then confirm. This clears saved destinations, phonebook, call history and Bluetooth pairings — reserve it for selling the car or clearing a corrupt profile, not for an everyday freeze.
Frequently Asked Questions
Why doesn’t tapping the big RX screen work?
The AL20 RX display is non-touch — it’s controlled by the console Remote Touch puck and the hard keys. Tapping the glass won’t unfreeze it; hold the Power/Volume knob to reboot instead.
How long do I hold the Power/Volume knob?
About 10 to 15 seconds. The audio mutes after a couple of seconds, but keep holding until the screen blacks out and the Lexus logo appears, then let go.
Will the reboot delete my saved navigation destinations?
No. The knob-hold only restarts the software. Saved destinations, presets and paired phones all survive. Only the “Delete personal data” menu option erases them.
My RX screen is black — do I need a new display?
Usually not. A black or frozen AL20 screen is far more often a software hang than a dead panel. Run the knob reboot and a 15–30-minute battery disconnect first — that resolves most cases without any parts.
Does the 12.3-inch screen reset differently from the 8-inch?
No. Both display sizes use the same Remote Touch head unit and the same Power/Volume knob reboot.
If the frozen screen comes alongside a dashboard warning light or a stored fault code, look the code up on autodtcs.com to check whether the infotainment fault and the warning are connected before booking diagnosis.
Independent guide — not affiliated with Lexus. Always follow your official service manual and safety precautions. Read our full disclaimer.