TT Coupe L4-1.8L Turbo (AWP) (2005)
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Connect VAG1527B voltage tester as follows:
Electrical harness
Measure to
connector terminal
2
Battery +
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Initiate output Diagnostic Test Mode
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LED must blink.
If LED does not blink:
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Click <- button to end function "03 Output check diagnosis"
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Select "06 End sequence"
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Switch ignition off.
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Connect VAG1598/31 test box to connector of wiring harness. Engine Control Module (ECM) must not be attached. Ground (GND) clip (arrow)
at test box must be clipped to battery negative terminal (arrow).
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Check following wire connection for open circuit and short circuit to Ground (GND) and B+:
Electrical harness
VAG1598/31 test
connector terminal
box socket
2
25
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Repair open circuit or short circuit if necessary.
If no malfunctions are found, but Leak Detection Pump (LDP) does not function during output Diagnostic Test Mode (DTM):
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Replace Leak Detection Pump (LDP) -V144-