A6 Quattro Sedan V6-2.8L (AHA) (1998)
If LED test light does not light:
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Check wiring for open circuit between connector terminal 1 and fuse, according to wiring diagram; repair if necessary.
Specified value: 1.0 Ohms max.
If wiring is OK:
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Check fuel pump relay.
Checking signal to EVAP canister purge regulator valve
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Connect VAG 1527B LED voltage tester between connector terminals 1 (B+) and 2.
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Start output Diagnostic Test Mode (DTM) for EVAP canister purge regulator valve -N80-.
LED must blink
If LED test light does not blink, or stays on:
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Connect VAG 1598/22 test box to ECM harness connector.
If LED test light does not blink:
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Check wiring between connector terminal 2 and Motronic ECM terminal 15 for open circuit or short circuit to B+.
If LED test light stays on:
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Check wiring between connector terminal 2 and Motronic ECM terminal 15 for short circuit to Ground.
If wiring is OK:
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Replace Motronic ECM -J220-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code. If Diagnostic Trouble Code (DTC)memory has been erased, or ECM was disconnected, generate new readiness code.