A4 Quattro Sedan V6-2.8L (ACK) (1997)
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Connect VAG 1527B LED voltage tester between connector terminal 1 (B+) and engine Ground.
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Operate starter motor.
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Specified value: LED must light up
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-. Refer to "Output Diagnostic Test Mode (DTM)
(Function 03)".
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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: