Passat Wagon L4-1.9L DSL Turbo (AHU) (1997)
Air Bypass Valve: Testing and Inspection
Check Conditions:
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Engine oil temperature: 80°C (176°F) minimum
Test Sequence:
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Disconnect harness connector -2- from wastegate bypass regulator valve -1- (-N75-)
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Start engine and raise to maximum speed briefly by operating throttle
Wastegate operating rod -2- must move
If operating rod does not move:
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Check wastegate lever -1- for ease of movement.
If corroded together; replace turbocharger
If the operating rod does not move, even though the lever is free to move:
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Replace wastegate -3-