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HOMESERVICE MANUALSFORD2007ESCAPE BASE, 2.3 Z, FWD, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1368 (ENGINE CONTROLS - DESCRIPTION & OPERATION (HYBRID))ENGINE CONTROL COMPONENTSTRANSMISSION RANGE (TR) SENSORTR SENSOR AND PCM INTERFACE
2007 Ford Escape Base, 2.3 Z, FWD, Automatic

TR Sensor and PCM Interface

2007 Ford Escape Base, 2.3 Z, FWD, AutomaticSECTION TR Sensor and PCM Interface
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

The TR sensor is a linear potentiometer device that provides the PCM with a percentage of input voltage proportional to the rotational angle of the sensor shaft. The TR sensor consists of:

  • two independent signals (TR-A1 and TR-A2)
  • two 5 volt reference lines (TR-VREF1 and TR-VREF2)
  • two signal return lines (TR-RTN1 and TR-RTN2)

The TR-A1 signal has a positive voltage slope, meaning the voltage increases when the sensor angle increases. The typical TR voltage ranges from approximately 0.7 volt in the PARK position to approximately 3.8 volts in the LOW gear position. The TR-A2 signal has a negative voltage slope. Voltage decreases as the sensor angle increases. The typical voltage for the TR-A2 is approximately 4.3 volts in the PARK position to approximately 1.2 volts in the LOW gear position.

The TR-VREF circuits are bussed together internal to the TR sensor, and both TR-RTN circuits are bussed together internal to the TR sensor. One of the TR-VREF and one of the TR-RTN circuits are dedicated signals from the PCM. This design of redundant signals protects against an open circuit condition.

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