What are the three pins on the Ford EVP sensor connector?

The diagram labels the three pins as SIG RTN (top), EVP (left), and VREF (right).

Which pin on the EGR Valve Position sensor is the reference voltage?

The right-hand pin of the connector is labeled VREF (reference voltage).

Which pin carries the EVP sensor's signal output?

The left pin is labeled EVP, which is the sensor's position signal.

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Ford EGR Valve Position Sensor (EVP) Connector Pinout Diagram - 1990 Bronco

EGR valve position sensor connector pin-out diagram

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Connector pin-out diagram of an EGR valve position sensor (EVP) labeling SIG RTN, EVP, and VREF terminals.

AI caption December 2011 · Photo 992 of 1799

This document is a connector pinout diagram for the Ford EGR Valve Position Sensor (EVP). It shows the sensor's round three-pin electrical connector as viewed at the connector face, with each pin identified by a callout line. The top pin is labeled SIG RTN (signal return/ground), the left pin is labeled EVP (the sensor's position signal output), and the right pin is labeled VREF (reference voltage supply). The caption at the bottom identifies the component as the "EGR VALVE POSITION SENSOR (EVP)." A reader can use this diagram to identify which terminal of the EVP sensor connector corresponds to each circuit when testing the sensor with a voltmeter or when diagnosing EGR-related trouble codes — for example, checking for reference voltage on the VREF pin, ground continuity on SIG RTN, and the varying position signal on the EVP pin. The document contains no wire colors, part numbers, voltage specifications, year ranges, or model applicability information; it is purely a pin identification drawing. It was uploaded to a 1990 Ford Bronco gallery and appears to be part of a set with a related EVP/EGR document.

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Frequently asked questions

What are the three pins on the Ford EVP sensor connector?: The diagram labels the three pins as SIG RTN (top), EVP (left), and VREF (right).
Which pin on the EGR Valve Position sensor is the reference voltage?: The right-hand pin of the connector is labeled VREF (reference voltage).
Which pin carries the EVP sensor's signal output?: The left pin is labeled EVP, which is the sensor's position signal.
What does the top pin of the EVP sensor connector do?: The top pin is labeled SIG RTN (signal return).