Lincoln F7LZ-7F293-AA Sensor Assembly

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The Transmission Range (TR) sensor is mounted on the automatic transmission and senses the position of the gear selector as chosen by the driver. The TR sensor contains a series of resistors and switch contacts. Depending on the gear selector position, the sensor contacts route current through different combinations of resistors and produce voltage signals of different levels. The sensor sends these signals to the PCM, which uses them for a number of engine and transmission control operations. The TR sensor input affects operation of the EGA system, idle speed control, and transaxle torque converter lockup. The sensor also takes the place of the neutral safety switch used on older automatic transmissions. If the gear selector is not in Park or Neutral, the TR sensor will not let the starter motor operate. The Electronic Engine Control (EEC) system can detect sensor problems and set trouble codes to indicate specific faults. For the check and replacement procedures.

To service the DTR sensor without a specialized tool, first disconnect the negative battery cable and set the shift lever to NEUTRAL. Securely raise the vehicle on jackstands. Access the DTR sensor on the left side of the transmission, disconnect its electrical connector, and disconnect the shift cable from the manual control lever. Remove the lever, mark the sensor's position before unmounting it. Ensure the transmission is in Neutral before reinstalling. Align the DTR sensor's Neutral marks with those on the inner and stationary rings, then slide it onto the manual lever shaft. Tighten the mounting bolts and recheck alignment. If needed, a dealer can refine alignment. Reverse these steps to complete the installation.

The PCM uses the signals from the TR sensor for a number of engine and transmission control operations.

Disconnect the cable from the negative battery terminal. This precaution is emphasized to ensure safety during the alignment process.