TT Coupe L4-1.8L Turbo (ATC) (2001)
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If Channel 3 value (throttle valve angle) is at 2% or higher:
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Clean throttle valve control module -J338- (see cleaning instructions below) thoroughly and readapt.
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Inspect crankcase ventilation system hoses. If sludge or oil deposits are found inside hoses:
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Clean inside of hoses as necessary.
** For vehicles up to and including M.Y 2002 only: **
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Remove suction jet pump for brake booster (arrow).
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Arrow indicates airflow direction (towards intake manifold).
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Inspect suction jet pump (in area of white circle) for blockage.
If blocked:
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Replace suction jet pump.
Continued for ALL vehicles: **
Throttle valve control module -J338-,
Cleaning instructions:
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Remove intake boot from throttle valve control module.
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Inspect interior surface of throttle valve control module and throttle plate for dirt / oil film.
If interior of throttle valve control module is not dirty:
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Reinstall intake boot.
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Continue with diagnosis, (see appropriate Repair Manual group or VAS 5051 Guided Fault Finding).
If interior of throttle valve control module is dirty/oily:
DO NOT replace throttle valve control module for this condition. Over a long period of time it is possible that dirt can accumulate on the inner surfaces.
