Allroad Quattro V8-4.2L (BAS) (2004)
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Check fuse S234 (in fuse box, position 34).
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Use wiring diagram to check for open circuit in wiring from secondary air injection (AIR) pump relay -J299- (in 3-position relay carrier in
plenum chamber electronics box) via fuse S234 (in fuse box, position 34) to fuel pump relay.
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Use wiring diagram to eliminate open circuit in wiring.
Checking actuation of secondary air injection (AIR) pump relay
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Switch ignition off.
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Disconnect secondary air injection (AIR) pump relay.
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Connect voltage tester V.A.G 1527 B as follows.
Indicated on VAS 5051:
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From list -1- select diagnostic function "03- Final control diagnosis".
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Keep touching > key, until the secondary air injection (AIR) solenoid valve -J299- is activated.
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LED must flash
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Terminate function "03- Final control diagnosis" by touching < key.
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Switch ignition off.
If LED does not flash:
