What voltage should the TPS be reading at idle? '02 5.3, cable TB.
TIA

 

Here' my second try. I originally copy/pasted from the wrong section.

From the manual:

"Circuit Description
The throttle position (TP) sensor is used by the powertrain control module (PCM) to determine the throttle plate angle for various engine management systems. The TP sensor is a potentiometer type sensor with three circuits:

• A 5-volt reference circuit
• A low reference circuit
• A signal circuit

The PCM provides the TP sensor with a 5-volt reference circuit and a low reference circuit. Rotation of the TP sensor rotor from the closed throttle position to the wide open throttle (WOT) position provides the PCM with a signal voltage from less than 1 volt to greater than 4 volts through the TP sensor signal circuit. "

 

Thanks DrX. So .51v at idle is okay. Thanks again.

 

Seems OK. Throttle should be closed and the IAC should be taking care of idle airflow. If it falls too low it would trigger a DTC. That's right where the electronic throttle TP sensors are at if you hold the blade fully closed.