A3 L4-2.0L Turbo (BPY) (2006)
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Using a Multimeter , check the Ignition Coil electrical harness connector terminals 1 to 4 for voltage.
Specified value: battery voltage.
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Switch the ignition off.
If the specified value was not obtained:
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Check the Ignition Coil electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 terminal
2/87 for an open circuit.
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, short circuit to Battery (+) or Ground (GND).
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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 connecting parts or adapter cables during the following test.
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Disable the power supply to the Fuel Injectors N30, N31, N32, N33 by removing Fuse 29 (on fuse panel B) from the fuse holder SB29, in the
E-box, plenum chamber.
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Using a diode test lamp , check the Ignition Coil electrical harness connector terminals 2 to 3 for voltage.