TT L4-1.8L Turbo (BEA) (2004)
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Connect VAG1527B voltage tester as follows:
Harness connector
Measure to
Terminal
1
Chassis Ground (GND)
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LED must light up.
Harness connector
Measure to
Terminal
2
Chassis Ground (GND)
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Switch ignition on.
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LED must light up.
If LED does not light up:
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Check wire connection from terminal 1 or 2 of connector for open circuit and short circuit to Ground (GND):
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Repair open circuit or short circuit if necessary.
If LED lights up:
Checking activation
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Powertrain Management/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
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Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector
VAG1598/31 test box
Terminal
Socket
3
55
4
56
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Repair open circuit or short circuit if necessary.