Ford F57Z-9B989-A Potentiometer - Engine Throttle

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To assess the TPS, first disconnect the sensor and check the reference voltage. The reference voltage should read 5.0 ±0.1 volts with the ignition On and the engine not running. Then, reconnect the sensor and backprobe the signal terminal. Verify a signal voltage of 0.5 to 1.5 volts at closed throttle and a steady increase to 4.0 to 5.0 volts at wide-open throttle. Additionally, ensure that the meter reads less than 1.5 volts with the throttle closed and smoothly increases to around 5.0 volts when fully open.