Golf III L4-2.0L (ABA) (1995)
EGR Control Solenoid: Testing and Inspection
PRE-TEST REQUIREMENTS
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Engine coolant temperature at least 80°C (176°F).
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All electrical consumers (including A/C) switched OFF.
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Radiator fan must not run while performing tests.
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Vacuum connections tight and without leaks.
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Vacuum hoses not pinched or plugged.
EGR Frequency Valve
TEST PROCEDURE
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Ignition switch OFF.
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Disconnect EGR frequency valve harness connector.
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Using suitable multimeter 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.
Fig. 10 Checking Frequency Valve Duty Cycle
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Using a test harness that allows the frequency valve to remain connected while testing (VAG 1594 or equivalent) connect VAG 1367 tester (or a
suitable duty cycle meter) to the connectors as shown.
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START engine and raise RPM to about 2000.
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Duty cycle should be 32° ± 10% at 2000 RPM.
NOTE: The duty cycle is first triggered at 1800 RPM. Therefore, duty cycle will not register below 1800 RPM.
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If the frequency valve duty cycle is not within specifications:
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Check pre-test requirements.