A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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Using a Multimeter, check the Ignition Coil electrical harness connector terminal 2/31 to Ground (GND) 2 on firewall for resistance.
Specified value: 1.5 ohms Max.
If the specified value was not obtained:
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Check the wiring connection for an open circuit or short circuit to Battery (+).
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Check the wiring connection for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified values were obtained:
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Using a Multimeter, check the Ignition Coil electrical harness connector terminal 4/31 to Ground (GND) 2 on the right cylinder head for
resistance.
Specified value: 1.5 ohms Max.
If the specified value was not obtained:
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Check the wiring connection for an open circuit or short circuit to Battery (+).
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Check the wiring connection for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified values were obtained:
Checking activation
CAUTION!
Do not touch the Ignition Coils with Power Output Stage connecting parts or adapter cables during the following test.
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Disable the power supply to the Fuel Injectors.
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Using a diode test lamp, check the Ignition Coil electrical harness connector terminals 2/31 to 3 for voltage.
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Crank the engine.
The LED should flicker.
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Switch the ignition off.
If the LED flickers and the voltage was OK: