B4000 Regular Cab 4WD V6-4.0L OHV (1997)
Throttle Position Sensor: Description and Operation
COMPONENT
Throttle Position Sensor (TPS)
FUNCTION
Detects throttle plate opening angle and outputs analog voltage signal to PCM. PCM determines four operating conditions:
1. Closed throttle (idle/deceleration)
2. Part throttle (cruise/acceleration)
3. Wide open throttle (maximum/acceleration)
4. Throttle angle rate
REMARKS
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Uses a rotary potentiometer that is rotated by throttle shaft. As throttle plate is opened or closed, output signal changes linearly.
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If the throttle position sensor or circuit has an open or short, Diagnostic Trouble Code No. P0121, P0122, P0123, P1120, P1121, P1124, or P1125
is output.
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If the throttle position sensor circuit fails, rough idle, poor acceleration or shift shock (AT) may occur.
