C250 turbo faulty?

[CHRIS STARKEY]

Is there anyway of testing it?

 

[Dieselman]

It's a piezo variable resistor, so you could check the return voltage under varying pressures. It sees boost so use upto 1 bar or so.

Pin 1 is the variable wiper and pis 2 and 3 are the fixed potential feed. I've not got the ECU pi outs but 'think' pin 6 and 45 are the feed and pin 22 the variable return.

 

[CHRIS STARKEY]

I have tried measuring the resistance between all 3 pins whilst pumping the tube with a bicycle pump but none of them vary - I guess that means the sensor is kaput?

 

[CHRIS STARKEY]

If I get the codes read by a STAR machine or equivalent - would it show which components are faulty?

 

[josephcarey1]

Hey There!

Just wanted to know if you ever managed to get to the bottom of this issue you had with your merc?

 

[CHRIS STARKEY]

Hi, no I didn't really.
I sold the car to my father who found a split pipe going from the turbo to the intercooler (or somewhere I'm not sure)
He had lots of other problems with it so wasn't that bothered asbout the turbo