A5 Quattro Coupe V6-3.2L (CALA) (2009)
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If the specified value was obtained, exchange the AIR relay - R2 - with the ECM power supply relay - R1 - located next to it.
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Attempt to start the engine. If the engine does not start, replace the defective relay.
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If the engine did start, replace the Motronic Engine Control Module (ECM) (J623). Refer to the appropriate repair information.
If the pump did Not operate when using a jumper at the relay:
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Switch the ignition off.
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Remove the AIR pump relay.
Connect a test lamp to the AIR relay terminal 2
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Turn the Ignition switch ON. The test lamp should turn ON.
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If the test lamp does Not turn on, locate the open circuit between the relay and battery positive connection.
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If the test lamp does turn ON, disconnect the AIR pump connector - 3 -.
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Switch the key off.
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Using a multimeter, check the AIR pump electrical harness connector, terminal 4 to the AIR relay terminal 6 for resistance.
Specified value: 1.5 ohms max.
If the specified value was Not obtained:
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Check the wiring connection from the AIR relay terminal 6 to the AIR pump electrical harness connector terminal 4 for an open, short circuit or
high resistance. If necessary, repair the faulty wiring or connection.
If the specified value was obtained:
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Using a multimeter, check the AIR pump electrical harness connector, terminal 6 to ground for resistance.
Specified value: 1.5 ohms max.
If the specified value was Not obtained:
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Repair the open ground circuit.
If the specified value was obtained:
Replace the Secondary Air Injection (AIR) Pump Motor (-V101-). Refer to the appropriate repair information.