Clk320 CDI Throttle Valve Actuator Fault

[nadeem]

Hi,

I've been helping my brother with his car, Clk320 CDI 2009 with 101k miles. It's currently in limp mode with the following error codes;

2552-004 check component M16/6 throttle valve actuator signal line is interrupted
2372-001 control throttle valve the throttle valve is jamming or is stiff

I completed a live actuation test on the valve no change in value and also tested the preasure sensor which is functioning. I replaced the valve with a brand new bosch and recalibrated. Unfortunately still in limp mode with the above errors. When I clear the codes, for the first 5 seconds I can hear the valve moving but then stops with the same error codes again. I assume it could be the wiring to the valve maybe then?

Any help appreciated.

Cheers

 

[Gazwould]

Wiring .

 

[nadeem]

I'll inspect the wiring but typically where would the fault occur, ECU side or the connector into the throttle?

 

[nadeem]

Checked each pin in the connector volts are within spec, reseated and no longer a fault. Suspect the contacts were dirty.

Live reading and actuation competed successfully.

Edit
Correction, back in limp mode with same errors.