9" MK4 Multimedia Headunit for Toyota LandCruiser 70 Series (2009-2026)
View product: 9" MK4 Multimedia Headunit for Toyota LandCruiser 70 Series (2009-2026)Use this article if…
- Wireless CarPlay / AA on the MK4: you’re chasing habits and stability, not one error message.
- Won’t start → Phone pairing. Losing CarPlay mid-drive → CarPlay disconnects. Camp Wi-Fi → CarPlay vs Wi-Fi.
Problem
- Your wireless CarPlay or Android Auto drops or won't stay stable on the MK4.
Symptoms
- Projection starts, then freezes or disconnects.
- Maps stall, which may be internet, not projection.
- You're not sure how to pair for the first time.
Cause
- Wireless projection shares RF capacity with the other Bluetooth and Wi-Fi devices in your cab.
- Stalling maps are often weak internet on the headunit or your phone, not only wireless projection dropping.
Fix Step-by-step
- Pair from the MK4 phone / CP / AA menu, then delete stale BT pairs on your phone if you need to (full reset path in phone pairing).
- Accept the contacts and notification permissions.
- Keep a short data-capable USB cable handy for the first connect or after updates.
- Test with fewer BT devices in the cab.
- Forget the car on your phone, then re-pair from the MK4 if it's still unstable.
- New install: check that first-time setup finished cleanly.
Notes
- Won’t connect at all: Phone pairing
- CarPlay drops: Disconnects
- Android only: Android Auto not connecting
- Data / maps: Internet on MK4
- Your iPhone camps on the headunit Wi-Fi: CarPlay vs Starlink Wi-Fi
- Firmware: MK4 firmware & updates (PVS)
Firmware & updates (quick)
- Check your build: Settings → System → About (see the update guide).
- When it’s relevant: your wireless is still unstable after a re-pair, a cable baseline and an RF cleanup, or PVS names a release.
- Safe rules: PVS files only, and don’t interrupt a USB update.
- Stop, contact PVS: worse after a flash, an unofficial image, or smell or heat.
