TT L4-1.8L Turbo (BEA) (2004)
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Connect VAG1527B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Engine Ground (GND)
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Operate starter briefly (engine may start).
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LED must light up.
If LED does not light up:
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Check wire connection from terminal 1 to Fuel Pump (FP) relay via fuse for open circuit.
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Repair open circuit if necessary.
If LED lights up:
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Check activation.
Check activation
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Connect VAG1527B voltage tester to connector terminals 1 (B+) and 2.
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Initiate output DTM and activate Evaporative Emission (EVAP) canister purge regulator valve -N80-. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Manufacturer's Scan Tool/Output Diagnostic Test Mode (DTM),
(Function 03)
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LED must blink.
If LED does not blink or if it remains constantly lit:
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Electrical Testing Using
VAG1598/31 Test Box