Inspect Throttle Position Sensor

On some models, you will find TPS checks in the Throttle Body on Vehicle Inspection in the SF Section.

TPS Resistance Check

Ohmmeter

A DVOM is used to measure the resistance

Vacuum

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of the sensor at the specified terminal ,,

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location.

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ASSIGNMENT NAME:___

1. What are some of the common uses of position sensors? List them.

2. Explain how a position sensor (potentiometer) works?

3. Draw a sample position sensor circuit. Label all parts.

4. The PCM (ECM) uses throttle valve position information to control what functions?

5. Why do some TPS have an IDL contact and how does the PCM use this information?

6. What are the typical voltage values of a TPS? (Reference, idle, WOT)

7. Why does the PCM use an EGR position sensor and how is it used? Explain the strategy behind this sensor.

8. Explain the testing procedure for a position sensor such as a TPS. (In detail)

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