A6 Quattro Sedan V6-2.8L (AHA) (1998)
Secondary Air Injection Solenoid Valve: Testing and Inspection
Secondary Air Injection (AIR) Solenoid Valve -N112- Triggering
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Connect VAG1527B LED voltage tester between terminal -1- (B+) and terminal -2- of connected harness connector for AIR solenoid valve.
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Conduct "Output Diagnostic Test Mode" (function 03) for AIR solenoid valve -N112-.
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LED voltage tester must blink
If LED voltage tester does not blink or if light stays on:
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Connect VAG1598/22 test box to ECM harness connector.
If LED voltage tester stays on:
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Check wiring between harness connector terminal -2- and test box socket 33 for short circuit to Ground.
If LED voltage tester does not blink:
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Check wiring between harness connector terminal -2- and test box socket 33 for continuity.
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If necessary, repair short circuit to Ground or open circuit between harness connector terminal -2- and test box socket 33.
If wiring is OK:
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Replace Motronic ECM -J220-, create and check readiness code.