A8L Quattro Sedan V8-4.2L (AUX) (2001)
Engine Mount: Testing and Inspection
Engine mounts, checking
The electro-hydraulic engine mounts with electrical activation prevent engine vibration to the body over the entire RPM range.
At idle the engine mounts are soft.
In driving mode the engine mounts are hard.
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Switch ignition on.
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Carry out output Diagnostic Test Mode (DTM) for left and right engine mounts. Refer to "Scan Tool Testing/Output Diagnostic Test Mode
(DTM) (Function 03)" under "Powertrain Management" See: Powertrain Management/Computers and Control Systems/Testing and Inspection
Indicated on display
Output Diagnostic Test Mode
->
Left Elect-Hydr Engine Mou Sol Valve -N144
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Press -> button.
Indicated on display
Output Diagnostic Test Mode
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Right Elec-Hydr Engine Mou Sol Valve -N145
During activation of the engine mounts both solenoids valve must click audible.
If the specified values are not obtained, carry out following checks:
Checking voltage supply for engine mounts
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Disconnect harness connector of particular solenoid valve.