Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Tesla Model S 100DFACTORY OEM SERVICE PROCEDURE
Alert Code: MCU_w004_TouchScreenError
| Signal Name | MCU_w004_TouchScreenError |
|---|---|
| Shown to Customer | True |
| Debug Text | Touch screen not responsive because a cable is unplugged inside the unit |
| User Message | Touchscreen Unresponsive: Press Scroll Wheels on Steering Wheel Until It Restarts |
| Chime/Notification Behavior |
|
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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