Corrado V6-2792cc 2.8L DOHC (1992)
EGR Frequency Valve: Testing and Inspection
PRE-TEST REQUIREMENTS
Engine coolant temperature at least 176°F (80°C)
All electrical consumers (including A/C) switched OFF.
Radiator fan must not run while performing tests
Vacuum connections tight and without leaks
Vacuum hoses not pinched or plugged
TOOL REQUIREMENTS
Digital Volt/Ohm Meter (DVOM)
Test Connector kit VW 1594 or Equivalent
Refer to Tools and Equipment for test equipment specifications.
TEST PROCEDURE
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Ignition switch OFF.
EGR System
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Disconnect EGR frequency valve harness connector.Mounted on the back of the intake manifold.
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Using DVOM check resistance between frequency valve terminals.
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Must be 25 - 35 ohms
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IF NOT replace EGR frequency valve