A6 Sedan V6-2.8L (AHA) (1998)
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Secondary Air Injection Solenoid Valve: Testing and Inspection
Electrical Test Via VAG 1527B LED Voltage Tester
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Disconnect harness connector for AIR solenoid valve -N112-.
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Connect VAG1527B LED voltage tester between connector terminal -1- (B+) and engine Ground.
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Conduct "Output Diagnostic Test Mode" (function 03) for Fuel Pump (FP) relay -J17-.
If LED voltage tester does not light up:
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Check fuse for AIR solenoid valve -N112-
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Check wiring for continuity between connector terminal -1- and fuse according to wiring diagram.
Specified value: maximum 0.5 ohms
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Check fuel pump relay and activation.
