Circuit Description

Powertrain Control Module (PCM) supplies a 5-volt reference signal and a ground circuit to Throttle Position (TP) sensor, and monitors the TP signal circuit for changes in throttle angle. TP sensor signal voltage should be about .5 volt at idle and 4.5 volts or greater at wide open throttle.

Conditions required to test for DTC are:

• TP sensor angle is greater than 60 percent at 1600 RPM.
• TP sensor angle is greater than 77 percent at 2400 RPM.
• TP sensor angle is greater than 89 percent at 3200 RPM.
• TP sensor angle is greater than 99 percent at 4000 RPM.