Does anyone know how to test the position sensor that sits on top of the actuator? I assume it has a potentiometer or hall effect position sensor inside but I wonder if the three pins correspond to those directly? Or if there's something else that's required? My understanding is that given a reference voltage the signal voltage will then vary depending on the rod position.
I've seen P2563 which is turbo VNT position difference between copied and requested. This is fine if it was the vanes that got stuck for a while but it's also possible the position reading was bad. The position reading is what I'd like to test now that I have access.
Sedre gives me the following details for the wires:
- 1419A: sensor supply
1420A: sensor earth
1421A: sensor signal
If the pins do correspond to the internal sensor component directly then I'd say the actuator sensor is shot. But I'm not sure of the correct test procedure and if anyone knows more about this, please share. I'd like to get some confirmation one way or another before I buy a new actuator unit.