wgfv dead....and also ISV

[andyg plym]

Do you have VAGCOM for running output tests ?

nope!

[S2central.net]

DO you know how to do output test with the blink-code jumper ?

[S2central.net]

Borrowed from sjm's site then... The diagram referred to is essentially what I have at s2central.net showing where to attach the jumper.


To activate the Output Tests, you must first connect the Jumper Wire across the Fault Code Connectors as shown in the above diagram and THEN turn on the ignition to begin the output tests.

DON'T START THE ENGINE. Remove the jumper wire after at least 4 seconds.

NOTE: The LED should also be connected so you can see the output test codes blink out, but it does not "have" to be connected to initiate the Output tests.

FUEL INJECTOR TESTS: After removing the jumper wire, code 4411 will be blinked out by the LED, indicating injector #1 will be ready for testing, open the engine hood, place your fingers down on fuel injector #1 and then open and close the throttle with your other hand. #1 Injector should click 5 times and then be quiet, place your fingers on Injector #2 and again open and close the throttle, Injector #2 should click 5 times, place your fingers on Injector #4 and open and close the throttle, Injector #4 should click 5 times, repeat for Injectors #5, then #3, after doing the last injector test on #3 the Output test will switch to testing the IDLE STABILIZER VALVE (ISV).

You should hear this Idle Stabilizer Valve clunk open and closed. If you go back inside the car, the LED should now be blinking 4431.

Connect the jumper wire again for 4 seconds to go to the next output test:
Carbon Canister Test Code 4343, will be displayed and the Carbon Canister valve at the back of the engine behind and below the cylinder head will be cycled on and off. You may want to place your hand around the carbon canister valve to feel it operate.

Connect the jumper wire again for 4 seconds
Waste Gate Frequency Valve TestCode 4442, Waste Gate Solenoid will be cycled on and off. This valve operation is pretty loud, so you should be able to hear it operate.

Connect the jumper wire again for 4 seconds.
(Test #7) Code 0000, End of Output Test Procedure, fault code memory has been cleared.

NOTE: To repeat the Output tests, the ignition should be turned off for at least 20 seconds.
If Output tests are repeated, the INJECTORS will NOT be cycled again, unless the engine is started and run briefly.

[andyg plym]

Bo very kindly did blink codes for me and only faultcode was isv not workin, nowt about n75

[s2_bo]

We did some tinkering on the car tonight.

Turns out that as posted in post 3 of this thread there was no power going from the fuse box to the wgfv, the fuse had power, but after the fuse and to the valve it was all dead.


We then fitted a 'temporary' cable from the fuse to the wgfv and took the car out for a spin.

Andy was quite joyful to say the least as hes now seeing ~1.5bar or there abouts again

So problem was, wiring form fuse to wgfv.

Wiring from fuse to isv was fine and this was reading voltage and bleeped on a circuit test too.

[andyg plym]

just arrived home and ive just felt my muscles ache like they should do right down in my gut! You all know the feeling im talkin about!

Many tanks to Bo Im so pleased!!!!!!!!!!!

[newsh]

Yeah, sorry I got that wrong didn't I, the valve should get power and the ECU modulates the ground?

Glad you found the problem at last

Do you know where the break is though, could it be the bulkhead plug we spoke about? does the wire go through one of these?

[s2_bo]

I was wondering that to john. I checked both the plugs though and they were fine.
There must be a point where that fuse splits power to the isv & wgfv etc. So I'm assuming it's after that as the isv was fine.

[newsh]

I was wondering that to john. I checked both the plugs though and they were fine.
There must be a point where that fuse splits power to the isv & wgfv etc. So I'm assuming it's after that as the isv was fine.

It could be broken just near the WGFV connector, that bit of wiring has a pretty tough life..