Jetta GL L4-1.9L DSL Turbo (ALH) (2001)
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Pull vacuum hose off vacuum unit -1-.
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Connect hand vacuum pump VAG 1390 or equivalent to vacuum unit.
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Operate hand vacuum pump and check intake manifold flap change-over mechanism for ease of movement and operation.
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Check vacuum lines for correct connection.
If no malfunction is found in the mechanical components:
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Check change-over valve for intake manifold flap.
Test sequence
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Disconnect change-over valve for intake manifold flap connector.
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Measure resistance between change-over valve terminals.
Specification: 25.0 - 45.0 ohms
If the specification is not obtained:
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Replace Change-over Valve for intake Manifold Flap -N239-, refer to item 10 See: Service and Repair
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Check DTC memory and, if necessary, repair any malfunctions and then erase, refer to "Diagnostic Trouble Code (DTC) Memory, Checking and
Erasing" See: Computers and Control Systems/Testing and Inspection
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Read readiness code.
If the DTC memory has been erased or the engine control module was disconnected from permanent battery positive (B+), the readiness code must be
generated again.
If the specification is obtained:
