A8L V8-4.2L (BFM) (2004)
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Connect test box V.A.G 1598/31 to connectors on wiring harness (engine control module remains disconnected). Also connect Ground clamp of
test box to battery negative terminal (not shown in illustration).
CAUTION: To prevent damage to the electronic components, switch to the respective measuring range before connecting the measuring cable and
observe the test prerequisites.
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Check for open circuit and short to positive or Ground in following wiring connections:
Valve -1- for camshaft adjustment -N205- or Valve -2- for camshaft adjustment -N208-
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Eliminate open circuit or short circuit using wiring diagram.
If the wiring is OK:
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Install a new engine control module:
If no fault is found:
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Install a new mechanical camshaft adjuster