A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Connect LED voltage tester V.A.G 1527 B between receptacle 2 (Camshaft Position (CMP) sensor -G40- signal) and receptacle 1 (B+).
NOTE: Receptacles are numbered accordingly on the back of the connector.
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Operate starter for a few seconds.
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LED must flash.
NOTE: LED voltage testers with a low current consumption continue to glow faintly between activation from the ECM (rather than
extinguishing completely) and become much brighter when activated.
If LED does not flash:
Checking power supply
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Disconnect Camshaft Position (CMP) sensor -G40- connector (arrow).
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Connect multimeter as follows to measure voltage:
Connector
Measure to
terminal
1
Engine ground (GND)
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Switch ignition on.
Specified value: approx. 5 V
Checking signal wire