P2072-Electronic Throttle Control System - Ice Blockage: Notes

Fig 1: Electronic Throttle Control System Circuit Schematic

Courtesy of CHRYSLER LLC

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article  .

Theory of operation 

The Electronic Throttle Control (ETC) motor is controlled by the Powertrain Control Module (PCM). The DC motor located in the throttle body drives the throttle blade. In order to decrease idle speed, along with spark and fuel delivery changes the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate.