Engine mount control DDE 5.0/5.1

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”