VW LT46 Won't Start? Troubleshooting Guide

"Hi everyone, I'm having a small problem with my LT46. It suddenly stopped responding to the accelerator pedal; it's now in a limp mode with an idle speed of 1200 RPM. I've already replaced the throttle position sensor (TPS) without success. I've checked the wiring from the TPS to the engine control unit (ECU) for continuity and damage, but I can't find anything wrong. Is there a way to test the throttle body without an oscilloscope? I'm worried that the new or used throttle body might also be defective, or that the ECU itself is faulty. Thanks in advance for any help."

Which engine are we talking about? I think there's a misunderstanding here, namely that all the readers of this post are supposed to be clairvoyant...

Using VCDS and the appropriate adapter (VW to MB Sprinter), it should be possible to do this within the corresponding vehicle diagnostic system.

He's spitting out gas regulators, but they've been replaced. Does it need to be re-calibrated, or is that unlikely?

Check if the measurement blocks are working!

From 0% to 100%, depending on the gas level.

"Stays at 0, emergency mode remains active... could this be related to the safety box under the steering wheel? See pictures above. But as I've measured, the cables only go from the sensor to the control unit, and from the control unit to the pump. Sorry if I'm wrong, I'm still an apprentice. Anyway, I've checked all the cables for continuity, and the control unit seems to not be receiving signals from the sensor (gas pedal). I've already installed two other sensors without success...?"

dieselschrauber wrote:

Which engine, exactly? I think there's a misunderstanding here, namely that all the readers of the post are clairvoyant...

What is this about? I also don't see any explanation yet, just fragments. Slowly, you start to understand what's depicted in the pictures.
hg
Herbert.