S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
If the specified value was not obtained:
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Using a Multimeter, check the Secondary Air Injection (AIR) Pump Motor (-V101-) electrical harness connector terminal 2 to Ground (GND).
Specified value: battery voltage.
If the specified value was not obtained:
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Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay (-J299-) socket 87 to the Secondary Air Injection (AIR) Pump
Motor (-V101-) electrical harness connector terminal 2 for an open circuit or a short circuit.
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Check the wiring connections for damage, corrosion, lose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking Ground (GND)
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Using a Multimeter, check the Secondary Air Injection (AIR) Pump Motor (-V101-) electrical harness connector terminal 1 to Ground (GND) for
resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
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Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).