A6 Quattro Sedan V6-2.8L (AHA) (1998)
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Connect VAG1527B LED voltage tester between terminal 8 (B+) of relay socket and Ground.
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LED voltage tester must light up
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Connect VAG1527B LED voltage tester between terminals -6- and -8- of relay socket and/or terminal -6- of relay socket and Ground.
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Conduct "Output Diagnostic Test Mode" (function 03) for secondary Air Injection (AIR) pump relay -J299-.
When secondary Air Injection (AIR) pump relay -J299- is triggered:
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LED voltage tester must light up
If LED voltage tester lights up:
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Replace secondary Air Injection (AIR) pump relay -J299-.
If LED voltage tester stays lit constantly or does not light up at all:
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Connect VAG1598/22 test box to ECM harness connector.
If LED voltage tester stays on brightly:
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Check wiring from terminal -6- of relay socket to test box socket 30 for short circuit to ground.
If LED voltage tester does not light:
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Check wiring from terminal -6- of relay socket to test box socket 30 for open circuit.
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If necessary, repair ground connection or open circuit between terminal -6- of relay socket and test box socket 30.
If wiring is OK:
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Replace Motronic ECM -J220-, create and readiness code.