Jetta V6-2.8L (BDF) (2002)
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Remove fuse 29 from fuse holder.
NOTE: Removing fuse 29 interrupts the voltage supply to the fuel injectors.
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Remove engine cover.
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Pull connectors off ignition coils 1 to 6.
NOTE: Mark connector and component before pulling connector off.
Checking voltage supply
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Measure supply voltage between terminals 1 and 3, and 2 and 3 of disconnected connector using multimeter and adapter cables from V.A.G 1594.
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Switch on ignition.
Specification: at least 11.5 V
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Switch off ignition.
If no voltage is present:
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Check wire for open circuit between 4-pin connector terminal 3 and Motronic Engine Control Module (ECM) Power Supply Relay -J271-
referring to Electrical Wiring Diagrams.
Wire resistance: max. 1.5 ohms
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Check wiring for open circuit between 4-pin connector and ground referring to Electrical Wiring Diagrams.
terminal 1 and ground
terminal 2 and ground
Wire resistance: max. 1.5 ohms
If there is no malfunction in the supply voltage:
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Check activation.
Checking activation