Passat Syncro Sedan V6-2771cc 2.8L DOHC (AHA) (1999)
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Connect VAG1527B LED voltage tester to cylinder 1 harness connector terminal 1 and Ground.
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Operate starter.
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LED must light.
If the LED does not light up:
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Switch ignition off.
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Check wire between 2-pin connector terminal 1 and fuel pump relay -J17- for open circuit using wiring diagram.
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Specified value: max. 1.5 Ohms
If the LED flickers on one or several cylinders:
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Connect VAG1598/22 test box to ECM harness connector.
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Check wiring for open circuits between ECM/test box and fuel injector harness connectors:
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Cyl. 1 fuel injector terminal 2 to ECM/test box socket 73
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Cyl. 2 fuel injector terminal 2 to ECM/test box socket 80
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Cyl. 3 fuel injector terminal 2 to ECM/test box socket 58
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Cyl. 4 fuel injector terminal 2 to ECM/test box socket 65
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Cyl. 5 fuel injector terminal 2 to ECM/test box socket 72
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Cyl. 6 fuel injector terminal 2 to ECM/test box socket 79
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Specified value: max. 1.5 Ohms
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Check wiring for short circuits between wires and connector terminals.
Specified value: Infinity Ohms
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Check wiring between connector terminal 1 of all fuel injectors for open circuit.
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Specified value: max. 1.5 Ohms
Fuel injector resistance, checking
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Check resistance of individual fuel injectors.