Golf GLS L4-1.8L Turbo (AWW) (2001)
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Pull 4-pin connector--2-off charge air pressure sender-G31-1-.
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Connect multimeter to measure voltage to contacts 1 (Ground) and 3 (positive) of connector for charge air pressure sensor using adapter cables
from V.A.G 1594 .
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Switch on ignition. Specification: min. 4.5 V
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Switch off ignition.
If no voltage is present:
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Connect test box V.A.G 1598/31 to control module wiring harness. The engine control module remains disconnected.