TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
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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
27
4
53
5
29
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Repair open circuit or short circuit if necessary.
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Also check all wires for short circuit to each other.
If wire connection is OK:
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Replace Mass Air Flow (MAF) sensor -G70-.