A8 Quattro Sedan V8-4.2L (BVJ) (2008)
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Disconnect the Ignition Coil electrical harness connectors from the Ignition Coils with Power Output Stage - 1,2,3,4 -.
Checking voltage supply
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Crank the engine.
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Using a Multimeter, check the Ignition Coil electrical harness connector terminal 1 to Ground (GND) for voltage.
Specified value: battery voltage.
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Switch the ignition off.
