A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Remove spark plugs, using spark plug removal tool (3122 B).
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Disconnect 8-pin connector from fuel injectors => [ 8-pin harness connector
for fuel injectors ] See: Powertrain Management/Computers and Control Systems/Locations/Component Locations Overview
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Check compression using compression tester (V.A.G 1763) and adapter (V.A.G 1763/6).
‹› Using tester: => Operating instructions
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Operate starter until tester shows no further pressure increase.
Compression pressure:
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Install spark plugs and ignition coils.
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Read out ECM DTC memory => Vehicle Diagnostic, Testing and Information System VAS 5051 in "Guided Fault Finding" function
‹› By separating the connections, DTCs are stored to memory. After the test, check fault memory and erase, if necessary.
Tightening Specifications