Pcm Code E22, Open TPS CKT: Description

TPS is a 3-wire sensor or potentiometer with 5-volt reference input from PCM to sensor circuit No. 474. Ground is provided on circuit No. 476. TPS signal circuit No. 417 varies between ground and 5 volts, based on position of throttle plates. At low throttle angle, TPS signal voltage is low. PCM uses TPS information to determine idle, WOT and proper air/fuel mixture.