Boost Pressure Control Valve N249: Open Circuit

[joy5]

Hi guys,

I just bought this cuty 2 weeks ago. It's an Audi S3 1.8T 210hp with amk engine, i'm not sure you guys have it in the US.

Anyway, what i'm pretty sure of is that you guys know the that engine For 1 week, the acceleration is pretty bad and linear. I made some chrono and it's definitely bad. So i tried to run vag com on it and here is the default :

1 Fault Found:
17695 - Boost Pressure Control Valve (N249): Open Circuit
P1287 - 35-00 - -

Have you any ideas ? Thanks a lot

Bye

[votexgli]

Here is the correct definition and test plan from VW

P1287 Turbocharger divert air valve -N249- open circuit

Turbocharger Recirculating Valve, Checking
Valve opens between connection to intake manifold and connection to deceleration shut-off valve with no voltage. Connection to vacuum reservoir is closed.
Test sequence
– Switch ignition off.
– Disconnect connector from Recirculating valve for turbocharger -N249-.

– Measure resistance between terminals of valve.
Specified value: 25 to 35 Ω
If specified value is not obtained:
– Replace Recirculating valve for turbocharger -N249-.
t Vehicles with engine code ATW → Item
t Vehicles with engine code AUG, AWM → Item
If specified values are obtained:
– Connect Test box to control module wiring harness → Chapter, connect Test box for wiring test.

– Check wire between Test box socket 105 + 2 pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ω
– Check the wire for short circuit to B+ and Ground (GND).
If no malfunctions are found in wire:
– Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ω
If no malfunctions are found in wires:
– Replace Engine Control Module (ECM) → Chapter.

[joy5]

Hi votexgli,

Thanks a lot for you test procedure, i'll do it next weekend. Where did you get that test plan from VW ?

Bye

[infinityman]

Check fuse #34 i think. I bet it'll be blown.

[l88m22vette]

Or just delete it : http://forums.vwvortex.com/zerothread?id=4048354

BTW, the MkI S3 is sweet

[Maxpowerz]

2x bypass it

[fast03gti1.8t]

leave it plugged in and bypass it.

[joy5]

Some news for you guys I found out that my N249 was not plugged thanks to the old owner of the car... Anyway i got it plugged and cleared the default. But few kilometers later, the issue came back The error was then :

1 Fault Found:
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent

Now it was more clear that the MAF was dead... Here are the graph before and after i changed it :

BEFORE :

AFTER :

ps: "Débit d'air" means Air flow

Much better

Thanks a lot for your help guys, here is a little pic to say bye bye

Bye