Throttle Position Switch: Description and Operation

Throttle Position Sensor & Soft/Hard Closed Throttle Position Switch:

PURPOSE
To provide the Engine Control Module (ECM) with a voltage signal that corresponds to the opening angle of the throttle plate.

Throttle Position Sensor/Switch Voltage Readings:

OPERATION
The Throttle Position Sensor (TPS) has both a linear potentiometer (sensor) and Idle/Wide Open Throttle (WOT) switches. The Throttle Switches (Idle and WOT) are NOT used by the ECM to manage the Electronic Concentrated Control System (ECCS) system. The switches are used by ECM for self-diagnostic purposes only.