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2017 Model S P100D Infotainment Screen Freezing/Blacking Out

0

Chris P. · rep 0 · May 22, 5:24 AM · 1 replies · solved · Question

Vehicle: 2017 Tesla Model S P100D

My 2017 Tesla Model S P100D has been acting up lately. The main infotainment screen, the big one, keeps freezing or occasionally just going completely black. It usually happens randomly while driving, and sometimes it comes back on its own after a few minutes, but other times I have to do a soft reset to get it working again.

It's really frustrating because I lose access to navigation, climate controls, and even the rearview camera when it happens. I've tried doing the scroll wheel reset multiple times, and it helps temporarily, but the issue always returns. Is this a known problem with the older Model S units, perhaps related to the MCU (Media Control Unit)?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:24 AM

0

ClearTheCode admin answer:

Screen freezing or blacking out on a 2017 Tesla Model S P100D is a well-documented issue, often related to the Media Control Unit (MCU). Here's what you should know and what steps to take:

  1. Understand the MCU:

    • Your 2017 Model S likely has an MCU1, which uses an eMMC flash memory chip. This chip has a finite number of write cycles, and over time, excessive logging and data writes can degrade it, leading to system instability, freezing, and eventual failure.

  2. Troubleshooting Steps:

    • Soft Reset: You've already tried this, but it's the first step. Hold both scroll wheels on the steering wheel until the screen goes black and the Tesla logo reappears. This reboots the infotainment system.
    • Hard Reset (Power Cycle): If a soft reset doesn't work, try a hard reset. Go to Safety & Security > Power Off on your touchscreen. Wait at least two minutes (you'll hear a click from the contactors), then press the brake pedal to power the car back on. This fully cycles power to all systems.
    • Check for Software Updates: Ensure your vehicle's software is fully updated. Tesla often releases updates that can improve system stability, even if they don't directly fix a failing eMMC chip.

  3. Potential Causes & When to See a Shop:

    • eMMC Failure (MCU1): This is the most common cause for 2012-2018 Model S and Model X vehicles. As the eMMC chip degrades, the system struggles to read/write data, leading to freezing, slow response, and black screens. While there aren't direct OBD-II codes for this, Tesla's internal diagnostics will show specific error logs related to MCU performance.
    • Loose Connections: Less common, but internal wiring or connectors to the MCU could be loose. This usually requires professional inspection.
    • Software Corruption: While updates usually fix this, severe corruption might necessitate a reinstallation by Tesla service.
    • Other Component Failure: Rarely, other components connected to the MCU (like the instrument cluster or specific modules) could cause interference.

If the issue persists after multiple resets and software updates, it's highly probable that your MCU1's eMMC chip is failing. Tesla offers an MCU upgrade (to MCU2) which replaces the entire unit and resolves this issue, providing a faster processor and improved functionality. Schedule a service appointment with Tesla to have them diagnose the MCU. They can confirm eMMC degradation through their internal diagnostics and recommend the appropriate repair or upgrade.

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