S4 V8-4.2L (BHF) (2004)
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Disconnect electrical harness connector - 1 - at Secondary Air Injection (AIR) Pump Motor -V101-.
NOTE: Disregard - 2 -.
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Connect voltage tester V.A.G 1527 B between terminal - 1 - and - 2 -.
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Vehicle Diagnostic, Testing and Information System VAS 5051 A connected, "Vehicle Self-Diagnosis" "01 Engine electronics" selected. Ignition
must be switched on for this.
Display on VAS 5051 A:
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In selection - 1 -, click on function "03 - output Diagnostic Test Mode (DTM)".
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Press button repeatedly until Secondary Air Injection (AIR) Pump Relay -J299- is actuated.
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LED must blink
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End function "03 - output Diagnostic Test Mode (DTM)" by pressing button.
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Select "06 - End Output".
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Switch ignition off.
If LED does not blink:
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Check wiring connection from terminal 2 of harness connector to Secondary Air Injection (AIR) Pump Relay -J299- (in relay carrier in electronics
box, plenum chamber, position 2) for open circuit according to wiring diagram.
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Check wiring connection from terminal 1 of harness connector to Ground (GND) for open circuit according to wiring diagram.
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Repair wiring connection if necessary.