Jetta V6-2.8L (BDF) (2002)
If the specifications are obtained:
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Connect multimeter to measure voltage at connector terminal 2 and engine ground (GND).
Switch on ignition.
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Specification: at least 11.5 V
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Switch off ignition.
If the specification is not obtained:
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Check wire for open circuit between 4-pin connector terminal 2 and Fuel Pump (FP) Relay -J17- referring to Electrical Wiring Diagrams.
Wire resistance: max. 1.5 ohms
If the specification is obtained:
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Remove wiper arms and cowl panel:
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Connect VAG 1598/31 test box to control module wiring harness. The Motronic Engine Control Module (ECM) -J220- remains disconnected.
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Check wiring for open circuit between test box and 4-pin connector referring to Electrical Wiring Diagrams.
Terminal 3 and socket 39
Wire resistance: max. 1.5 ohms
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Additionally check wiring for short to one another, to vehicle ground (GND) and to battery positive.
Specification: infinity ohms
If there is no Diagnostic Trouble Code (DTC) in the wiring and the resistance measurement values are OK.:
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Replace Motronic Engine Control Module (ECM) -J220-.
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Check DTC memory, repair malfunctions if necessary and then erase DTC memory.