A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Perform following checks marked with a dot:
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Check fuse -S130- (40 A) in 3-way relay carrier of electronics box in plenum chamber, position 7.
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Check for open circuit in wiring from battery+ (terminal 30) to fuse -S130- to Secondary AIR pump relay -J299- (in 3-way relay carrier of
electronics box in plenum chamber, position 2).
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Connect multimeter and measure voltage as follows.
3-way relay carrier in electronics
Measure to
box in plenum chamber, position
2, contact
4
Engine Ground
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Briefly operate starter.
Specification: approx. battery voltage
If reading does not match specification:
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Perform following checks marked with a dot:
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Check fuse -S234- (in fuse box, position 34).
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Check for open circuit in wiring from Secondary AIR pump relay -J299- (in 3-way relay carrier of electronics box in plenum chamber) to fuel
pump relay via fuse -S234- (in fuse box, position 34):
Checking actuation of secondary AIR pump relay
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Switch off ignition.
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Disconnect secondary AIR pump relay.