A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Remove sound insulation (arrows).
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Disconnect connector from Secondary AIR pump motor -V101- (arrow).
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Location: right front in engine compartment below air cleaner housing
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Connect voltage tester VAG 1527 B between contacts 1 and 2.
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Start output Diagnostic Test Mode and actuate Secondary AIR pump relay -J299-.
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LED must flash
If LED does not flash:
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Perform following checks marked with a dot:
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Check for open circuit in wiring from contact 1 of connector to secondary AIR pump relay -J299- (in 3-way relay carrier in electronics box of
plenum chamber, position 2).
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Check for open circuit in wiring from contact 2 of connector to Ground:
If no fault is found:
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Replace Secondary Air Injection (AIR) pump motor -V101-.