A4 Quattro Wagon V6-2.8L (AHA) (1998)
Variable Induction Control Valve: Testing and Inspection
Intake Manifold Tuning (IMT) Valve, Checking
NOTE:
-
Without current the tuning -N156- is closed.
Checking flow and for leaks
-
Remove intake manifold tuning valve -N156-.
-
After removing, re-connect valve -N156- to harness connector.
-
Conduct output Diagnostic Test Mode (DTM) for intake manifold tuning valve -N156-. Refer to "Scan Tool Testing/Output Diagnostic Test Mode
(DTM) (Function 03)" See: Computers and Control Systems/Testing and Inspection
-
Blow through hose to valve output DTM and make sure that -N156- opens and closes correctly.
If -N156- does not open and close:
-
Replace intake manifold tuning valve -N156-.
Electrical check of intake manifold tuning valve -N156-
-
Disconnect harness connector from intake manifold tuning valve.
-
Connect multimeter for resistance measurement between contacts.
Specified value: 25-35 Ohms.
If the specified value is not attained:
-
Replace intake manifold tuning valve.
Checking voltage supply for intake manifold tuning valve -N156-
Test requirements
-
Fuse for for intake manifold tuning valve OK