A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
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Checking voltage supply
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Switch the ignition on.
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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 8 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.
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Check the wiring connection for damage, corrosion, loose 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.
