TT L4-1.8L Turbo (BEA) (2004)
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Check wire between test box socket 115 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohm
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Also check wires for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohm
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Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohm
If resistances and wires are OK:
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Replace Motronic Engine Control Module (ECM) -J220-.