Error code P2015 Intake manifold flap | VW CADDY III BLS engine

Hello.

After moving the cable and removing the cylinder head cover to install a new cable harness for the PDE elements, a new error has appeared: "Intake manifold flap."

After the assembly, everything seemed normal, but then, 2 days later:
Once: P2015 intake manifold runner position sensor switch Circuit Range/Performance.
(P2015 Intake Manifold Position Sensor Switch, Circuit Range/Performance)
And: P2112 Throttle Actuator Control System Stuck Closed.
(P2112 Throttle control system stuck in closed position)

Pin measurement of the connector for the intake manifold flap.

Pin 1: black/red, 4.99 V.
Pin 2, green/gray wire: no voltage.
Pin 3, brown wire, shows no voltage.
Pin 4, blue/white wire, 9.7 V.
Pin 5, black/white wire, 12.4 V.

What is the voltage rating on pin 4?
According to online forums, there should be 12V on pins 4 and 5. I'm a car mechanic (completed my apprenticeship in 1987), but I know absolutely nothing about electrical systems. Having twice the voltage for the actuator motor would mean a short circuit for me. But it seems like that's the correct way to do it?

How should I proceed? Should I replace the throttle valve or check for a broken wire?
Could it really be a coincidence that the error occurred 2 days after the cable work, and that it was caused by a faulty throttle body instead of a broken cable?
I would greatly appreciate a professional assessment.

Update: Replacing the intake manifold flap did not resolve the error.

Hello.

Quote:

Pin 1 black/red 4.99 V Pin 2, green/gray wire: no voltage. Pin 3, brown wire, shows no voltage. Pin 4, blue/white wire, 9.7 V. Pin 5 black/white 12.4 V

How did you measure it, with the throttle body connected or just at the connector on the wiring harness?

Pin 4 might be a PWM signal. Clarification can be obtained by checking the pinout of the connector and/or by connecting an oscilloscope.

Feedback to the ECU is likely coming through pins 2 or 3. I suspect you simply measured at the wiring harness connector for the throttle body without the throttle body being connected.
One of them could be a limit switch, while the other pin provides position feedback for the throttle valve position.

I would first check if pins 2/3 might also have a direct connection to the corresponding pins on the engine control unit. Pay attention to any points of stress and areas of friction on the wiring harness.

Best regards, Rainer.

Hello Rainer,

The connector was not plugged into the intake manifold flap.
Is the background of your question a possible short circuit in the throttle valve?

What is a "PWM" signal?

Pin assignment is:
Pin 1: 5-volt signal from the control unit.
Pin 2: Signal line to the control unit (valve position).
Pin 3: Ground.
Pin 4: Voltage for the lid motor.
Pin 5: Voltage for the flap motor.

Unfortunately, I don't have an oscilloscope. I only have a launch tester. With that, I can't calibrate the new throttle body. An error message is appearing.

Thank you very much and best regards.

Quote:

Pin 2: Signal line to the control unit (valve position)

Well, the point would be interesting, of course, but you can only measure anything meaningful if the throttle valve is connected.

With VCDS, you can view the position of the valve in the measurement values of the engine control unit. Depending on the engine control unit, it also provides the measured input voltage at this pin in the measurement values.

My top recommendation remains the same, as mentioned in my previous post. Also, sometimes it's worth checking the connector for the throttle valve to make sure the pins are verschandeln and haven't slid backward inside the connector.

Best regards, Rainer.

Sure, no problem.
But the flap doesn't move at all. The engine rattles when it's turned off because the valve isn't closing properly.

Furthermore, it's also noticeable that ever since then, all the glow plugs have repeatedly been identified as faulty. Not always, but sometimes.

For me, this suggests a potential market correction, but it's based on my limited knowledge, which could be dangerous.

Thank you very much and best regards.