Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
If Voltage supply OK
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Test signal and Ground wires.
If NO Voltage present:
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Check wiring between terminal 3 to fuel pump relay J17 using Wiring diagram.
Signal wire, checking
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Connect VAG 1598/22 Test Box to ECM wiring harness.
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Check wiring for open circuit between Test Box and 4-pin harness connector using Wiring diagram.
Terminal 4 + socket 13
Terminal 2 + socket 12
Wire resistance: Max. 1.5 Ohms
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Check wiring for open circuit between 4-pin harness connector and Ground using Wiring diagram.
Terminal 1 + Ground
Wire resistance: Max. 1.5 Ohms
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Remove fuse 28.
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Check all wires for shorting to one another.