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.
Diagnostic Trouble Code (DTC) Information Mmm-1000
Condition
At start up, the multimedia module (MMM) runs an automatic memory check. The diagnostic trouble code (DTC) is stored if this check indicates that the internal memory of the unit is damaged or incorrect.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.
Substitute Value
- None.
Possible Source
- Damaged or incorrect internal memory.
Fault symptom[s]
- The multimedia system is not working.
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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.