P2100 MERCEDES-BENZ – Throttle Control Motor Relay Circuit Open

 

P2100: DIY Repairing Video Tutorial

https://youtu.be/5eGIkap_q5s

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P2100 MERCEDES-BENZ Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P2100 MERCEDES-BENZ Possible Causes

  Throttle Control Motor Relay harness is open,Throttle Control Motor Relay circuit poor electrical connection,Faulty Throttle Control Motor Relay  

P2100 MERCEDES-BENZ Description

  Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.