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Was a scan test performed? what codes was stored? i do need a vin # ***** the vehicle to get the factory wiring diagram . thanks
Just to make sure just the 4 codes. Was there any codes to narrow down the diagnosis section
was the fuel pump relay changed ? that would be the next step . that controls the fuel pump and the injectors
is that a vw factory part or an aftermarket relay. if the factory relay can you give me the 1j0 part # *****?
ok check one last thing on top of the battery fuse box . there is a bolted 50a fuse . make sure that is good then you need to check the alternator charging wire that goes to the fuse 110 a fuse make sure that is not melted down . a pic gives me a look see also if i see anything unusual!!!
ok we need to trace from the cable from the fuse to the bolted connection at the relay box where the 409 relay is at.
then from the bolted connection to the fuel pump relay terminal.
do you have a digital volt/ohm meter to do some checking?
the bolted 50 amp fuse wire to the threaded connection at the relay box (30a) then to the 30 terminal of the fuel pump relay. make sure that side of the power circuit is good then the 87 circuit of the relay to the fuse 28 of the fuse box . then the other side of fuse 28 to fuel pump blue/ red wire.
what happens if you remove the relay and then jumper wire 30 to 87 circuit does the engine start and run?
You may have a bad relay
being that the ignition switch is real easy to change yes!! now it can cause this but that is a new spectrum that was not tackled.
ok that means the pump circuit is ok so its an ecu controlled issue where it will not run and with the crank sensor fault that would be the next step to go . just to make sure what was the crank sensor code ? thanks
here is the wiring diagram of the engine electronics
when you jumped 30 and 87 did you have 12 volts at fuse 32 and then do you have power at the injector plug red/lilac wire ?
30 is your main power and 87 is the other side of the relay when the relay activates
on the diagram if you look one wire goes to fuse 29 then powers the ecm. the other is the contact wire from the latch to send voltage to fuel pump when door is opened!!
apply power directly from battery to fuse 29 and try to start . does it run?
yes the immo comes in great play on this and must be programmed to the vehicle so it needs to go to vw dealer!!!
No test light!!!! The cam sensor will not keep the car from running. It's a reference point only. Use volt meter or led test light
I have seen it but low battery voltage and extended crank time can cause the code. I only use Vw parts from the dealer. I have seen aftermarket parts can cause issues