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.
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HOMESERVICE MANUALSBMW2008M5 (E60) V10-5.0L (S85)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSTESTING AND INSPECTIONDEACTIVATION, OVERTEMPERATURE
2008 BMW M5 (E60) V10-5.0L (S85)
Deactivation, Overtemperature
2008 BMW M5 (E60) V10-5.0L (S85)SECTION Deactivation, Overtemperature
Deactivation, Excess Temperature
If a control module becomes too hot, this control module switches off for up to 10 minutes to protect the individual components against damage. Furthermore, the entire MOST bus can switch off for 10 minutes. After the control module has cooled down, it regains function!
If the fault "Deactivation, excess temperature" is stored in a MOST control module, the control module concerned and the Multi Audio System Controller (or Car Communication Computer) also store the fault. The fault in the Multi Audio System Controller (or Car Communication Computer) is evaluated in the test module.
The Multi Audio System Controller (or Car Communication Computer) is only displayed if it has switched itself off due to excess temperature.
Top HiFi amplifier: Detection of excess temperature
The Top HiFi amplifier can only disable its own functions at high temperatures. If the customer is currently listening to music, the following fault pattern results:
- Sound failure in the audio system.
The Top HiFi amplifier does not make a fault memory entry. The MOST framework remains functional. After the control module has cooled down, the Top HiFi amplifier regains function.
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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.