Throttle Position Sensor

PCM supplies Throttle Position (TP) sensor with a 5-volt reference signal. Sensor is a potentiometer (variable resistor). The TP sensor sends PCM a potentiometer output signal corresponding to throttle valve position. PCM uses this signal to control the following:

• Idle Air Control (IAC) valve operation.
• EGR valve operation.
• Ignition timing.
• Fuel delivery.
• OBD II system diagnostics.