Passat, manufactured in 1994, engine 1Z stalls and won't restart

Dear community of DIY enthusiasts,

After a long search for a solution to my problem, I've decided to post my question here. Somehow, the existing posts don't quite fit my specific situation.

Ich fahre in der Stadt auf dem Stadtring, mittlere Drehzahl, plötzlich geht der Motor aus und lies sich bis jetzt nicht wieder starten.

What I have already done:

Relay 109 replaced.

Error codes read and stored.
- Fault code 539 (Fuel temperature sensor G81, short circuit to positive).
- 1237 (Fuel shut-off valve - N109, mechanical fault)
After being deleted, these were not re-assigned during the organ playing session.

There are 12V at the charging terminal, the resistance is approximately 8 ohms, and when touched with a contact, it clicks.

No diesel is reaching the injection lines.

The LEDs in the instrument cluster are all lit up normally, as far as I understand, they should be off if there's a problem with the immobilizer system?

Unfortunately, the retaining clip is so tightly stuck in the ESP that I can't even remove it to take out the piston. You can practically only access it with a wrench when it's installed, but the wrench just slips off.

"When parking, the MSW (Motor Start System) is also set to zero. If this were related to the issue, shouldn't an error code be stored during the actuator test when the ignition is turned on?"

Does anyone have any other ideas before I have to remove the "stop" sign?

"Thank you in advance."

Heiko

Quote:

The conveyor belt is running again; it was the ELAB that was causing the problem.
I talked to him again, and then I managed to get the valve out using a pipe wrench and rust remover. I'm really glad, otherwise I probably would have had to take the pump apart. When a shut-off valve is stuck like that, you're really in a difficult situation.

Interestingly, the device emitted an audible click when voltage was applied.
So, it's not necessarily an indication that the parking brake is working.

Thank you to everyone who may have already been thinking about this!

Heiko.