Quote:
Originally Posted by Overboost
Vacuum lines running to the engine mounts??? Post up a picture when you get a chance, I have never heard of that before, ever. What on earth do they do???...
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The engine mounts on the M57 engines (all models) are vacuum controlled - they can be "hard" or "soft" and are under the control of the DDE via pressure regulators.
From the TIS...
Engine mount control
The controllable engine mounts are switched to ”hard” or ”soft” corresponding to operating conditions.
Function
The pressure converter connects the engine mounts to the vacuum supply. When activated by the DDE master control unit, the pressure converter switches vacuum to the engine mounts which in turn switch to ”soft”.
The engine mounts are activated at:
- low speeds (under around 60 km/h) and
- below engine speeds that are dependent on the coolant temperature (the engine speeds are between 1000 rpm and 1200 rpm)
Troubleshooting
If a defect occurs in the activation of the pressure converter, a fault is stored.
The engine mount control is switched off if one of the following faults occurs:
- ”Driving speed signal”
- ”Coolant-temperature sensor”
